Re: [MBZ] Troubleshooting Standing Pilot (millivolt) Gas Valve
All the external stuff has been removed. There is no sail switch, as this is a pool heater, but there are pressure and high temp cutout switches, again, which have been jumpered out. I'm gonna tear into the thing again tonight. I've worked on electrical controls for years, so this part won't be a big deal... Dan [EMAIL PROTECTED] wrote: In a message dated 5/6/2008 12:35:08 P.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: I figured this out Looks like the valve itself is good, it's the controls that are funky. I jumpered from the thermocouple to the main valve and it opened and the burners fired off. Yahoo! Dan, look for some kind of flow confirmation such as a sail switch in the pipe or a pitot tube that senses flow pressure. I have had sail metal fall off the arm and of course the water flow would not actuate the switch. could also be a bad micro switch. Check the easy stuff first. Jim Friesen Phoenix AZ 79 300SD, 264 K miles 98 ML 320, 155 K miles **Wondering what's for Dinner Tonight? Get new twists on family favorites at AOL Food. (http://food.aol.com/dinner-tonight?NCID=aolfod000301) ___ 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 - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. ___ 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] Troubleshooting Standing Pilot (millivolt) Gas Valve
I figured this out Looks like the valve itself is good, it's the controls that are funky. I jumpered from the thermocouple to the main valve and it opened and the burners fired off. Yahoo! Now I have to dig through the control circuits. What a PITA, as there is a little black box along with simple things like pressure switches and fusible links. I'm hoping it's not the black box, as I am sure it's expensive. Dan 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] Troubleshooting Standing Pilot (millivolt) Gas Valve
In a message dated 5/6/2008 12:35:08 P.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: I figured this out Looks like the valve itself is good, it's the controls that are funky. I jumpered from the thermocouple to the main valve and it opened and the burners fired off. Yahoo! Dan, look for some kind of flow confirmation such as a sail switch in the pipe or a pitot tube that senses flow pressure. I have had sail metal fall off the arm and of course the water flow would not actuate the switch. could also be a bad micro switch. Check the easy stuff first. Jim Friesen Phoenix AZ 79 300SD, 264 K miles 98 ML 320, 155 K miles **Wondering what's for Dinner Tonight? Get new twists on family favorites at AOL Food. (http://food.aol.com/dinner-tonight?NCID=aolfod000301) ___ 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] Troubleshooting Standing Pilot (millivolt) Gas Valve
I've got experience with gas systems, but not with standing pilot millivolt valves. I've got a spa heater that's giving me fits. Pilot stays lit, meaning that the generator (thermocouple) is working fine, but the main valve won't open when the control circuits are closed. Other than assuming the main valve is kaput, does anyone have experience with these kinds of gas systems, and if so, is there anything else I can check out? Nothing has changed since it last worked, such as gas pressure, etc., so I've narrowed it down to the valve. Dan 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] Troubleshooting Standing Pilot (millivolt) Gas Valve
Those gas solenoid valves are problematic. I had to replace a couple on a dryer, and my downstairs furnace currently has a bad one I just have not dealt with. You can see if the solenoid is getting energized with your meter (just hook it up across the wires-- check them too for continuity -- either at the solenoid or the controller), if it gets juice and doesn't open then you need a new valve (or maybe just the solenoid). They are not very expensive if I recall. WARNING: Working on these can cause dire results, up to and including death, dismemberment, dyspepsia, distention, disorders, dystopic tendencies, strabismus, sterility, and other conditions. See your doctor. Ask not what you can do for your country. Vote for change! Change your underwear. Hope to count your spare change. Yes we can! --R LWB250 wrote: I've got experience with gas systems, but not with standing pilot millivolt valves. I've got a spa heater that's giving me fits. Pilot stays lit, meaning that the generator (thermocouple) is working fine, but the main valve won't open when the control circuits are closed. Other than assuming the main valve is kaput, does anyone have experience with these kinds of gas systems, and if so, is there anything else I can check out? Nothing has changed since it last worked, such as gas pressure, etc., so I've narrowed it down to the valve. Dan 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 ___ 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] Troubleshooting Standing Pilot (millivolt) Gas Valve
In my limited experience, that is a bad gas valve. Given a humid climate, it is probably just corroded stuck inside. Unfortunately if you try to fix it, and anyone knows, you can have a huge liability problem. ... UNless you have had a repair training class by the manufacturer (slim to none) At 06:19 PM 5/5/2008, you wrote: I've got experience with gas systems, but not with standing pilot millivolt valves. I've got a spa heater that's giving me fits. Pilot stays lit, meaning that the generator (thermocouple) is working fine, but the main valve won't open when the control circuits are closed. Other than assuming the main valve is kaput, does anyone have experience with these kinds of gas systems, and if so, is there anything else I can check out? Nothing has changed since it last worked, such as gas pressure, etc., so I've narrowed it down to the valve. Dan 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 Loren Faeth ___ 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] Troubleshooting Standing Pilot (millivolt) Gas Valve
Its been a while, but IIRC, a water pressure signal has to be present for the main valve to open, otherwise you have a melt down of the heat exchanger. Hmmm, me thinks there was a tap off the inlet water pipe with a small copper tube going ???. Harry On Mon, May 5, 2008 at 6:19 PM, LWB250 [EMAIL PROTECTED] wrote: I've got experience with gas systems, but not with standing pilot millivolt valves. I've got a spa heater that's giving me fits. Pilot stays lit, meaning that the generator (thermocouple) is working fine, but the main valve won't open when the control circuits are closed. Other than assuming the main valve is kaput, does anyone have experience with these kinds of gas systems, and if so, is there anything else I can check out? Nothing has changed since it last worked, such as gas pressure, etc., so I've narrowed it down to the valve. Dan 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 ___ 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
