Re: [MBZ] OT AC Unit
Those home warranties are great. I made claims to replace an ancient water heater and fix a Kitchenaid dishwasher in 2 years. On Wed, Aug 5, 2015 at 10:52 AM, Kaleb C. Striplin via Mercedes mercedes@okiebenz.com wrote: Well we still have a home warranty for another month that came with the house, will call them and have somebody come out Sent from my iPhone On Aug 5, 2015, at 8:20 AM, Max Dillon via Mercedes mercedes@okiebenz.com wrote: My new HVAC units have a timer in the control board for the inside air handler, so the blower fan stays on for about a minute after the outside unit shuts off. It also delays blowing air for a bit after the outside unit starts. I think your air handler control board is either faulty or getting a bad signal from the thermostat, if your system is anything like mine. A new control board is probably cheaper than a service call, maybe swap in a new board first? -- Max Dillon Charleston SC '87 300TD '95 E300 ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT AC Unit
Well we still have a home warranty for another month that came with the house, will call them and have somebody come out Sent from my iPhone On Aug 5, 2015, at 8:20 AM, Max Dillon via Mercedes mercedes@okiebenz.com wrote: My new HVAC units have a timer in the control board for the inside air handler, so the blower fan stays on for about a minute after the outside unit shuts off. It also delays blowing air for a bit after the outside unit starts. I think your air handler control board is either faulty or getting a bad signal from the thermostat, if your system is anything like mine. A new control board is probably cheaper than a service call, maybe swap in a new board first? -- Max Dillon Charleston SC '87 300TD '95 E300 ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT AC Unit
With the exception of that one time the outside unit seems to be off but the inside unit is running at random. There are some back door settings in the thermostat that I adjusted slightly but nothing that I would think would affect it. I agree it sounds like a relay or control board issue. If the thermo sends 12v signal to turn on unit, then if the thermostat is removed the 12v signal is removed and that should turn off the unit. If this is the case I think that rules out the thermostat as the problem. Sent from my iPhone On Aug 4, 2015, at 10:52 PM, G Mann via Mercedes mercedes@okiebenz.com wrote: The thermostat sends a 12 volt signal [typically] which triggers a relay in the outside unit which connects 220 volt lugs to run the compressor pump and the cooling fans for the outside condenser. Very often, the symptoms which you describe, happen when the 220 Volt contacts become worn from arcing on contact and then stick together. Another thing that happens is the springs that force the contacts apart when the thermostat signal says disconnect become weak and the contacts stay connected.. It will of course cause your compressor to fail from overheating after running for hours while you are away from home [don't ask how I learned this]. I suggest it's a good time to call your local AC company for a service call, if you don't feel comfortable addressing it yourself.. If you do.. pull the service disconnect prior to opening anything electrical and of course be sure your unit is not going to kill you. Good luck Grant... On Tue, Aug 4, 2015 at 8:34 PM, Kaleb C. Striplin via Mercedes mercedes@okiebenz.com wrote: So the inside unit has been running a while but outside unit not, its at set temp of 73. It turned off a minute ago for about 1 minute and now has turned back on again. Thermstat says its calling for cooling and outside unit is running. Will see if it turns off in a few minutes On 8/4/2015 10:18 PM, Kaleb C. Striplin via Mercedes wrote: A couple of weeks ago I noticed the blower would kick on at random on the house ac unit even when it did not call for cooling (outside unit not running just inside unit). Sometimes it would run for 30 seconds then shut off. Sometimes when it does call for cooling when its done it will shut off then a couple of minutes later the inside unit will kick on. I was not sure if this was some sort of feature or what. Anyway, last night I noticed it was starting to get cold in the house and it had been blowing for a while. Thermostat was set to go to 73 at night. It was 71 inside temp indicated in the thermostat which was below the set temp. The outside unit was running but it seemed to be stuck. Not sure if it is a thermostat issue or some sort of control board issue on the inside or outside unit. I turned the thermostat off and it continued to run. I even actually removed the thermostat from the wall base plate so it was not connected and it still ran. Question is, should it not completely shut down if the thermostat is removed or if the stat was stuck in cooling mode and sent signal to the unit to turn on, will it continue to run until a signal is sent to turn it off so in other words even with thermostat removed it is not sending the off signal? I ended up flipping the breakers off for a minute then back on. I am thinking the outside unit did not come back on but the inside unit did and blew for a while then eventually shut off. Sitting here right now I am thinking I am having the same problem. I just cant figure out why it seems to only do it at night. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT AC Unit
I once had spiders build a nest inside the main contactor for the compressor. The pros sold me a hard-start kit before I found the real problem. -Original Message- From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Kaleb C. Striplin via Mercedes Sent: Wednesday, August 05, 2015 11:03 AM To: Mercedes Discussion List mercedes@okiebenz.com Cc: Kaleb C. Striplin ka...@striplin.net Subject: Re: [MBZ] OT AC Unit With the exception of that one time the outside unit seems to be off but the inside unit is running at random. There are some back door settings in the thermostat that I adjusted slightly but nothing that I would think would affect it. I agree it sounds like a relay or control board issue. If the thermo sends 12v signal to turn on unit, then if the thermostat is removed the 12v signal is removed and that should turn off the unit. If this is the case I think that rules out the thermostat as the problem. Sent from my iPhone On Aug 4, 2015, at 10:52 PM, G Mann via Mercedes mercedes@okiebenz.com wrote: The thermostat sends a 12 volt signal [typically] which triggers a relay in the outside unit which connects 220 volt lugs to run the compressor pump and the cooling fans for the outside condenser. Very often, the symptoms which you describe, happen when the 220 Volt contacts become worn from arcing on contact and then stick together. Another thing that happens is the springs that force the contacts apart when the thermostat signal says disconnect become weak and the contacts stay connected.. It will of course cause your compressor to fail from overheating after running for hours while you are away from home [don't ask how I learned this]. I suggest it's a good time to call your local AC company for a service call, if you don't feel comfortable addressing it yourself.. If you do.. pull the service disconnect prior to opening anything electrical and of course be sure your unit is not going to kill you. Good luck Grant... On Tue, Aug 4, 2015 at 8:34 PM, Kaleb C. Striplin via Mercedes mercedes@okiebenz.com wrote: So the inside unit has been running a while but outside unit not, its at set temp of 73. It turned off a minute ago for about 1 minute and now has turned back on again. Thermstat says its calling for cooling and outside unit is running. Will see if it turns off in a few minutes On 8/4/2015 10:18 PM, Kaleb C. Striplin via Mercedes wrote: A couple of weeks ago I noticed the blower would kick on at random on the house ac unit even when it did not call for cooling (outside unit not running just inside unit). Sometimes it would run for 30 seconds then shut off. Sometimes when it does call for cooling when its done it will shut off then a couple of minutes later the inside unit will kick on. I was not sure if this was some sort of feature or what. Anyway, last night I noticed it was starting to get cold in the house and it had been blowing for a while. Thermostat was set to go to 73 at night. It was 71 inside temp indicated in the thermostat which was below the set temp. The outside unit was running but it seemed to be stuck. Not sure if it is a thermostat issue or some sort of control board issue on the inside or outside unit. I turned the thermostat off and it continued to run. I even actually removed the thermostat from the wall base plate so it was not connected and it still ran. Question is, should it not completely shut down if the thermostat is removed or if the stat was stuck in cooling mode and sent signal to the unit to turn on, will it continue to run until a signal is sent to turn it off so in other words even with thermostat removed it is not sending the off signal? I ended up flipping the breakers off for a minute then back on. I am thinking the outside unit did not come back on but the inside unit did and blew for a while then eventually shut off. Sitting here right now I am thinking I am having the same problem. I just cant figure out why it seems to only do it at night. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http
