Re: [MBZ] Climate Control Failure Mode
I still haven't fixed mine, 'cause I can't seem to find the time to put it back together. I figured out that the fan was dying, but there may still be other issues to resolve once I get back on the project. I bought an Audi Quattro wagon to drive in the meantime, and its ACC works just dandy ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
On Jan 16, 2008 6:55 PM, Kevin Slater <[EMAIL PROTECTED]> wrote: > So how does one determine if you have an older or newer 87 model? > With regards to the fan fuse? Easy, it's either in the fusebox or not. If not, it's unmistakable---on my car, it's a big steel-colored strip fuse with "30A" stamped on it, same form factor as the one for the glow plug relay. Alex Chamberlain '87 300D Turbo et al. ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
Crazy how these things go together in bunches. I've been experiencing the same things that Casey has. A couple of days in the last few weeks the fan has come on, but it seems if I touch the fan buttons it stops and I'm back to only forced air. Not a problem on the highway trips, but not good when it's cold and you're driving around town. I pulled the pushbutton unit and resoldered a good number of the pads, didn't make a bit of difference. The way it worked a few times made me think it was heat / cold related and electrical in nature which aligns with Dave M's and Peter Frederick's advice. So how does one determine if you have an older or newer 87 model? ...Kevin ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
On Wed, 26 Dec 2007 22:45:34 -0800 Zeitgeist <[EMAIL PROTECTED]> wrote: > Well, I pulled the blower (without the benefit of a manual), and the > brushes and commutator are toasterrific. What's even more disturbing, > is the huge amount of grunge-buildup on the heater core fins. It's > almost entirely occluded any passage of air through there. It looks a > lot like the texture of velour. Ee! ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
> and commutator are toasterrific. What's even more disturbing, is the > huge > amount of grunge-buildup on the heater core fins. It's almost entirely > occluded any passage of air through there. It looks a lot like the > texture > of velour. Weird stuff, isn't it? Looks like flocking made from oil vapors and dust. Pressure washer works great, but might be a little hard on the fins and the car's interior. -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
well thats the evaporator, not the heater core, but yes it does need to be cleaned. They sell a cleaner for that. Zeitgeist wrote: > Well, I pulled the blower (without the benefit of a manual), and the brushes > and commutator are toasterrific. What's even more disturbing, is the huge > amount of grunge-buildup on the heater core fins. It's almost entirely > occluded any passage of air through there. It looks a lot like the texture > of velour. Is there a preferred method for removing this offending gunk? > I'll bet my heater/cooler output increases measurably after this little > exercise. > > On Dec 26, 2007 12:07 PM, Dave M. <[EMAIL PROTECTED]> wrote: > >> Pretty likely the fan motor is hosed. It will be fairly obvious once >> it's out, if the brushes are shot, and/or the commutator is deeply >> grooved. I would get the motor assembly WITH the fans mounted. The >> problem is that swapping the cages is difficult to do without breaking >> them. Although I've never tried, you might see if you can carefully >> remove your old cages intact... if so, you could attempt the >> motor-only swap. Be careful to get the cages installed in the right >> direction (!), and don't lose the balance clips on them either. >> >> > -- next part -- > A non-text attachment was scrubbed... > Name: heat.JPG > Type: image/jpeg > Size: 166199 bytes > Desc: not available > Url : > http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20071226/6fe564d8/attachment.jpe > > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > -- Kaleb C. Striplin/Claremore, OK 94 E420, 92 300SD, 92 300D, 92 250D Turbo, 92 300E 4Matic, 91 300D, 90 420SEL, 89 560SEL, 89 260E, 87 300SDL, 85 380SE 5.0 Euro, 84 190D, 84 300D euro manny, 81 240D, 81 380SLC, 80 240D, 76 240D, 76 300D, 72 250C, 69 250 http://www.okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
Well, I pulled the blower (without the benefit of a manual), and the brushes and commutator are toasterrific. What's even more disturbing, is the huge amount of grunge-buildup on the heater core fins. It's almost entirely occluded any passage of air through there. It looks a lot like the texture of velour. Is there a preferred method for removing this offending gunk? I'll bet my heater/cooler output increases measurably after this little exercise. On Dec 26, 2007 12:07 PM, Dave M. <[EMAIL PROTECTED]> wrote: > Pretty likely the fan motor is hosed. It will be fairly obvious once > it's out, if the brushes are shot, and/or the commutator is deeply > grooved. I would get the motor assembly WITH the fans mounted. The > problem is that swapping the cages is difficult to do without breaking > them. Although I've never tried, you might see if you can carefully > remove your old cages intact... if so, you could attempt the > motor-only swap. Be careful to get the cages installed in the right > direction (!), and don't lose the balance clips on them either. > > -- next part -- A non-text attachment was scrubbed... Name: heat.JPG Type: image/jpeg Size: 166199 bytes Desc: not available Url : http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20071226/6fe564d8/attachment.jpe ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
Yikes, Casey. That's a scary photo. And I thought my 300E was bad! What I did to clean the fins was use a shop vacuum, and a toothbrush, to scrape and suck away as much as possible, without pushing it further into the core. I then used a foaming evaporator cleaner from a local HVAC supply store to attempt further cleaning. I rinsed it with water from a garden sprayer tank... the liquid runs out the bottom drain tubes onto the floor. While it looked a lot prettier afterwards, I didn't notice any significant improvement in HVAC performance, but mine wasn't nearly as bad as yours. Here are photos of my my evap cleaning project - only one side was occluded on mine, though: http://www.w124performance.com/images/W124_stuff/evap_clean1.jpg http://www.w124performance.com/images/W124_stuff/evap_clean2.jpg http://www.w124performance.com/images/W124_stuff/evap_clean3.jpg http://www.w124performance.com/images/W124_stuff/evap_clean4.jpg http://www.w124performance.com/images/W124_stuff/evap_clean5.jpg I used Nu-Calgon Evap Foam cleaner, roughly $10/can - here's a link: http://tinyurl.com/cdddo This is a good reason to use the filters that Aaron Lam obtained through some contacts in Japan... it helps keep this crud out of your evaporator. Bummer they're so expensive, and so hard to obtain. It's a worse bummer that the factory didn't start using filters on the 124 chassis the until 1994 model year. And, worse yet, the factory setup can't be retrofitted without replacing the *entire* HVAC box (i.e., gutting the entire car)... you can't just add the factory filters to an 86-93 model. :-( -- Dave M. Boise, ID 1994 E500 - 100kmi (Q-ship) 1993 300D - 167kmi (Sportline) 1987 300D - 284kmi (Sportline Stage 2) > == > On 12/26/07, Zeitgeist <[EMAIL PROTECTED]> wrote: > Well, I pulled the blower (without the benefit of a manual), and the brushes > and commutator are toasterrific. What's even more disturbing, is the huge > amount of grunge-buildup on the heater core fins. It's almost entirely > occluded any passage of air through there. It looks a lot like the texture > of velour. Is there a preferred method for removing this offending gunk? > I'll bet my heater/cooler output increases measurably after this little > exercise. > > > On Dec 26, 2007 12:07 PM, Dave M. <[EMAIL PROTECTED]> wrote: > > Pretty likely the fan motor is hosed. It will be fairly obvious once > > it's out, if the brushes are shot, and/or the commutator is deeply > > grooved. I would get the motor assembly WITH the fans mounted. The > > problem is that swapping the cages is difficult to do without breaking > > them. Although I've never tried, you might see if you can carefully > > remove your old cages intact... if so, you could attempt the > > motor-only swap. Be careful to get the cages installed in the right > > direction (!), and don't lose the balance clips on them either. > > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
> I was under the impression that a failed monovalve would > provide heat at idle gradually cooling as the vehicle > picked up speed. That's certainly one symptom. Full heat can be another. A failed electrical portion (or wiring thereto) of the monovalve would do it. -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
Casey, Are you getting any fan output at all? If not, I'd check the fan fuse, which is either a 25A fuse in the fusebox on early 87's, or a 30A flat strip fuse outside the fusebox on late '87 models. The monovalve and vac system default into full-heat mode, but if there's no airflow from the fan, you'll never feel any of that heat. :-( Next, try gently turning the ignition key back towards 'off', just slightly - not enough to make any of the idiot lights turn on. See if the fan turns on. If so, the ignition switch is failing, but turning the key back a bit should make things work for a while longer (a couple of years, in my case.) Third, I'd check the aux heater pump, under the washer reservoir... make sure this is not shorted out. Disconnect it if in doubt. Finally, pull the blower motor and inspect the brushes... they usually don't last more than 15-20 years. I somewhat doubt that the pushbutton unit is the root cause of your problems, but if everything else checks out, it could be. The factory ACC manual has a lot of step-by-step troubleshooting procedures - it would be worthwhile to read that as well. =) -- Dave M. Boise, ID 1994 E500 - 100kmi (Q-ship) 1993 300D - 167kmi (Sportline) 1987 300D - 284kmi (Sportline Stage 2) > > On 12/26/07, Zeitgeist <[EMAIL PROTECTED]> wrote: > Ah, so I'm presently experiencing a complete failure with my the climate > control in my '87 300TD, which sorta sucks...you know, being that it's > sub-freezing and all. Right now I'm getting no heat or fan output at all. > I thought the default failure mode would kick the mono-valve wide open, > allowing full heat into the cabin--that's obviously not going on here. > > So, this started somewhat intermittently, with the fan failing to kick in > until a few minutes after starting the car, even on defrost. Then I noticed > a clicking behind the dash when I accelerated first thing in the morning. > Now, there's nothing at all. > > I just swapped in a spare pushbutton unit, but the failure mode is exactly > the same. I also changed the #7 fuse in the box. I don't presently have my > CD manual with me, so I'm blindly flailing around in desperation. Does > anyone have a clue what's going on here? Klima? OVP relay? > > TIA, > Casey > > '87 300TD 230k > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
A few days ago I went to look at a 89 low mileage 300TE, which came from Hong Kong. While I had a gander at it I asked the salesperson if the A/C was operative, yes was the answer but he reckons the ignition key had to be jiggled a bit to get it to work. Is replacing the ignition switch the only definite fix or can it be taken apart and rebuild? At the moment they want 10K Oz for it but I may offer them 6K because it has only done less than 100K klms and has 7 seats. Also it appears to have a limited slip differential (ASD), what are these like? Do they give trouble and can they be replaced with a standard diff if needed? Below is the output for the VIN (if it works): Another odd thing is that according to the VIN data the color is supposed to be smoke silver but it has been resprayed black and they did not do a good job, this doesn't worry me except that it might be hiding rust because the front jacking holes looked odd. The ad is at this link: http://search.carsguide.com.au/news/find-a-car/power-search/search-results/car-details.do?make=MERCEDES&model=300TE&make2=&model2=&make3=&model3=&keyword=&priceFrom=&priceTo=&body=&newBody=&transmission=&lifeStyle=&yearFrom=&yearTo=&location=All+Locations&postcode=&radius=&stockNumber=&sortFields=A&asc=true&pageNumber=&searchType=4&dealerId=&featureAd=false&vehicleId=NIMEMAAP6%3AMK74&vehicleType=1 *VIN* WDB1240902F064072 *Model* 300 TE *Chassis* 1240902F064072 *Engine*103983 22 103035 *Transmission* 722320 03 039556 *Order* 0 8 823 00060 *Delivery date* 25.01.88 *Dealer*Hong-Kong* (823)* *Interior* mb-tex black* (171)* *Paint* *702* smoke silver metallic (? 01.01.1983) *Options* *211* automatic limited slip differential (ASD) (? 01.07.1984) rear axle with automatic limited slip differential (ASD) *221* left front seat, electrically adjustable (? 01.11.1978) *242* right front seat electrically adjustable with memory feature. only applicable to series w 210 when installed in conjunction with code 275. (? 01.03.1983) *412* electric sliding roof with tilting device (? 01.07.1983) *420* automatic transmission, floor shift (? 01.01.1963) *524* paintcoat preservation (? 01.01.1964) *547* double roller blind and sun visors with mirrors on the left and right, illuminated (? 01.03.1982 ?? 31.07.1997) *570* folding armrest front w202/210 stowage box front with armrest (? 01.04.1970) front folding armrest w202 - housing at front with armrest *586* Behr air conditioner, and electric window lifters (front and rear doors) (? 01.04.1970) *593* heat-insulating glass, all-around, heated rear window pane (single-sheet safety glass), band filter green heat-insulating glass all round, heated rear window, single pane safety glass - tinted strip (? 01.01.1972) *601* oil for rear axle with limited-slip differential, in canisters and containers (? 01.01.1964 ?? 31.01.1990) *613* lamp unit, asymmetrical, l.h. traffic (? 01.02.1963) *640* aluminium disc wheels with radial-ply tires (? 01.10.1969 ?? 31.12.1989) *677* tropical battery (? 01.06.1965 ?? 30.11.1991) *844* folding seat bench in loading compartment, reverse to direction of travel (? 01.10.1977) Hendrik who needs more room than the 201 is offering Kaleb C. Striplin, work wrote: > When you start the car, turn the ignition switch back just a hair. The > spring in the switch is probably not completely returning to the run > position or its not making good contact when you start the car. Just do it > a hair. Put it on defrost or something while doing this so you can tell for > sure if it comes back on. Pretty common. Just get used to doing that or > replace the ignition switch. > > --- > Kaleb C. Striplin > Cox Auto Trader > 730-Tulsa FSBO Supervisor > > - Original Message ----- > From: "Zeitgeist" <[EMAIL PROTECTED]> > To: "Mercedes Discussion List" > Sent: Wednesday, December 26, 2007 11:32 AM > Subject: [MBZ] Climate Control Failure Mode > > > >> Ah, so I'm presently experiencing a complete failure with my the climate >> control in my '87 300TD, which sorta sucks...you know, being that it's >> sub-freezing and all. Right now I'm getting no heat or fan output at all. >> I thought the default failure mode would kick the mono-valve wide open, >> allowing full heat into the cabin--that's obviously not going on here. >> >> So, this started somewhat intermittently, with the fan failing to kick in >> until a few minutes after starting the car, even on defrost. Then I >> noticed >> a clicking behind the dash when I accelerated first thing in the morning. >> Now, there's nothing at all. >> >> I just swapped in a spar
Re: [MBZ] Climate Control Failure Mode
Jim, On your website you mention that full heat all the time regardless of temp. settings, buttons pushed or vehicle speed could be a symptom of monovalve failure. I've been expereiencing this for the past two months and was wondering what else it might be. I was under the imporession that a failed monovalve would provide heat at idle gradually cooling as the vehicle picke up speed. History - four years or so ago I replaced the monovalve insert and the foam tube behind the dash. Thank You, Fred Johnson Chicago 1977 240D 1983 300SD 1991 A-R 164L 1996 Civic Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
> Ah, so I'm presently experiencing a complete failure with my the > climate > control in my '87 300TD, You can also run the diagnostic checklist from my site: http://userweb.windwireless.net/~jimc/mamerepairs.html -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
Ah yes, I forgot one little detail...my fan has been making some ominous noises as of late--sorta like a jet taking off. I assumed I'd still receive some semblance of heat, even if the fan went completely TU. Is there any reason to buy the fan motor with both the squirrel cages attached, especially given that they're another $150 over the bare motor? The wiggling ignition key trick didn't work and I removed my auxiliary pump years ago, after hearing that it could cause the pushbutton unit to die. So, I'm guessing I just have a dead fan motor...bummer. I'll swing by my place later today and pick up my CD manual for the definitive check. Thanks all! Casey On Dec 26, 2007 9:50 AM, Dave M. <[EMAIL PROTECTED]> wrote: > Casey, > > Are you getting any fan output at all? If not, I'd check the fan fuse, > which is either a 25A fuse in the fusebox on early 87's, or a 30A flat > strip fuse outside the fusebox on late '87 models. The monovalve and > vac system default into full-heat mode, but if there's no airflow from > the fan, you'll never feel any of that heat. :-( > > Next, try gently turning the ignition key back towards 'off', just > slightly - not enough to make any of the idiot lights turn on. See if > the fan turns on. If so, the ignition switch is failing, but turning > the key back a bit should make things work for a while longer (a > couple of years, in my case.) > > Third, I'd check the aux heater pump, under the washer reservoir... > make sure this is not shorted out. Disconnect it if in doubt. Finally, > pull the blower motor and inspect the brushes... they usually don't > last more than 15-20 years. I somewhat doubt that the pushbutton unit > is the root cause of your problems, but if everything else checks out, > it could be. The factory ACC manual has a lot of step-by-step > troubleshooting procedures - it would be worthwhile to read that as > well. > > =) > > -- > Dave M. > Boise, ID > 1994 E500 - 100kmi (Q-ship) > 1993 300D - 167kmi (Sportline) > 1987 300D - 284kmi (Sportline Stage 2) > > > > > > On 12/26/07, Zeitgeist <[EMAIL PROTECTED]> wrote: > > Ah, so I'm presently experiencing a complete failure with my the climate > > control in my '87 300TD, which sorta sucks...you know, being that it's > > sub-freezing and all. Right now I'm getting no heat or fan output at > all. > > I thought the default failure mode would kick the mono-valve wide open, > > allowing full heat into the cabin--that's obviously not going on here. > > > > So, this started somewhat intermittently, with the fan failing to kick > in > > until a few minutes after starting the car, even on defrost. Then I > noticed > > a clicking behind the dash when I accelerated first thing in the > morning. > > Now, there's nothing at all. > > > > I just swapped in a spare pushbutton unit, but the failure mode is > exactly > > the same. I also changed the #7 fuse in the box. I don't presently > have my > > CD manual with me, so I'm blindly flailing around in desperation. Does > > anyone have a clue what's going on here? Klima? OVP relay? > > > > TIA, > > Casey > > > > '87 300TD 230k > > > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
Bad temperature sensors. You can check them from the right hand connector on the pushbutton unit. A bad aux pump can cause all sorts of trouble, too, but shutting off outputs all the time. Default is full heat with low or no blower and full defrost, so if you are getting hot air out the windshield vents, its electrical or vac failure. If no heat, it's either a temp sensor or a wiring failure. Check the wires on the coolant temp sensor (up on the upper radiator hose fitting). Mine were broken, results in no heat as the PBU "thinks" the engine is about -40F. Check the archives. I think I posted once which wires went to each sensor. The clicking is the vac servo switchover valve changing modes. An intermittantly shorted or open sensor will do this. Peter On Dec 26, 2007, at 11:32 AM, Zeitgeist wrote: > Ah, so I'm presently experiencing a complete failure with my the > climate > control in my '87 300TD, which sorta sucks...you know, being that it's > sub-freezing and all. Right now I'm getting no heat or fan output at > all. > I thought the default failure mode would kick the mono-valve wide open, > allowing full heat into the cabin--that's obviously not going on here. > > So, this started somewhat intermittently, with the fan failing to kick > in > until a few minutes after starting the car, even on defrost. Then I > noticed > a clicking behind the dash when I accelerated first thing in the > morning. > Now, there's nothing at all. > > I just swapped in a spare pushbutton unit, but the failure mode is > exactly > the same. I also changed the #7 fuse in the box. I don't presently > have my > CD manual with me, so I'm blindly flailing around in desperation. Does > anyone have a clue what's going on here? Klima? OVP relay? > > TIA, > Casey > > '87 300TD 230k > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Climate Control Failure Mode
When you start the car, turn the ignition switch back just a hair. The spring in the switch is probably not completely returning to the run position or its not making good contact when you start the car. Just do it a hair. Put it on defrost or something while doing this so you can tell for sure if it comes back on. Pretty common. Just get used to doing that or replace the ignition switch. --- Kaleb C. Striplin Cox Auto Trader 730-Tulsa FSBO Supervisor - Original Message - From: "Zeitgeist" <[EMAIL PROTECTED]> To: "Mercedes Discussion List" Sent: Wednesday, December 26, 2007 11:32 AM Subject: [MBZ] Climate Control Failure Mode > Ah, so I'm presently experiencing a complete failure with my the climate > control in my '87 300TD, which sorta sucks...you know, being that it's > sub-freezing and all. Right now I'm getting no heat or fan output at all. > I thought the default failure mode would kick the mono-valve wide open, > allowing full heat into the cabin--that's obviously not going on here. > > So, this started somewhat intermittently, with the fan failing to kick in > until a few minutes after starting the car, even on defrost. Then I > noticed > a clicking behind the dash when I accelerated first thing in the morning. > Now, there's nothing at all. > > I just swapped in a spare pushbutton unit, but the failure mode is exactly > the same. I also changed the #7 fuse in the box. I don't presently have > my > CD manual with me, so I'm blindly flailing around in desperation. Does > anyone have a clue what's going on here? Klima? OVP relay? > > TIA, > Casey > > '87 300TD 230k > ___ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] Climate Control Failure Mode
Ah, so I'm presently experiencing a complete failure with my the climate control in my '87 300TD, which sorta sucks...you know, being that it's sub-freezing and all. Right now I'm getting no heat or fan output at all. I thought the default failure mode would kick the mono-valve wide open, allowing full heat into the cabin--that's obviously not going on here. So, this started somewhat intermittently, with the fan failing to kick in until a few minutes after starting the car, even on defrost. Then I noticed a clicking behind the dash when I accelerated first thing in the morning. Now, there's nothing at all. I just swapped in a spare pushbutton unit, but the failure mode is exactly the same. I also changed the #7 fuse in the box. I don't presently have my CD manual with me, so I'm blindly flailing around in desperation. Does anyone have a clue what's going on here? Klima? OVP relay? TIA, Casey '87 300TD 230k ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
