texsis22
06-26-2009, 05:00 AM
Hi ! This board seems very knowledgeable and I need your help on a residential A/C question that I have.
I have 2 friends that claim to know AC but haven't been able to put their finger on the problem yet.
I have a goodman cpkj42-18 heat pump unit. I started having the problem of the outside condenser fan turning off about 20 minutes after I turned on the air. The blower in the attic then started blowing horribly hot air through the house, like the heat was on. This happened over and over without being able to run the unit 20 or 30 minutes without the outside condenser fan motor stopping. Every 20 minutes after the outside condenser fan stopped I would then have to kill the breaker switches to prevent hot air from blowing through the house. I was told to replace the condenser fan motor and capacitor. I did both a few days ago and then had the same exact problem.
I then told an ex ac friend what happened. They figured out that by removing the purple condenser fan motor wire from the defrost board and plugging it into somewhere else(forget the name of the terminal), it would make the condenser fan stay on. So basically we bypassed the defrost board and the fan motor stayed on until a/c unit shut off. I was so excited, but guess what. After 30 minutes the air went from 54 inside up to the high 80's within just minutes. The fan motor was still on ! I then ended up flipping off one of my 2 heat circuit breakers and this stopped the hot heat from blowing. So the a/c breaker is still on. Another breaker labeled heat is still on...the one that makes the air blow in the attic. But one heat breaker is flipped off...the one that stopped the hot air within 20 secs of flipping it off.
If I leave the purple fan motor wire where it is bypassing the defrost board the condenser fan stays on more than 20 minutes.
If I leave the one heat breaker off, the extremely hot air doesn't start to blow after about 20 to 30 minutes of turning on.
Also adding my friend told me a few days ago that the thermostat was calling for heat when it was set for ac and auto. I just replaced that 2 hours ago and then flipped my heat breaker back on. House cooled down nicely but after 30 minutes my boy was watching the digital thermometer I have in the vent. It went from 55 to 80 within a couple minutes. I sure hope one of you guys can help me. Now that I have basically eliminated my thermostat, condensor fan, capacitor, and am bypassing my defrost board to keep my condenser fan motor running. What all is left ????? I also need to add, that when I flip my thermostat to off and leave it on auto, my outside condenser fan turns off, but sometimes my blower motor in the attic sometimes will run an additional 10 minutes before turning off even though the thermostat is on off/auto. Hope this info gives you pros enough info to shoot down this problem. I will be very thankful to any help I can get.
I have 2 friends that claim to know AC but haven't been able to put their finger on the problem yet.
I have a goodman cpkj42-18 heat pump unit. I started having the problem of the outside condenser fan turning off about 20 minutes after I turned on the air. The blower in the attic then started blowing horribly hot air through the house, like the heat was on. This happened over and over without being able to run the unit 20 or 30 minutes without the outside condenser fan motor stopping. Every 20 minutes after the outside condenser fan stopped I would then have to kill the breaker switches to prevent hot air from blowing through the house. I was told to replace the condenser fan motor and capacitor. I did both a few days ago and then had the same exact problem.
I then told an ex ac friend what happened. They figured out that by removing the purple condenser fan motor wire from the defrost board and plugging it into somewhere else(forget the name of the terminal), it would make the condenser fan stay on. So basically we bypassed the defrost board and the fan motor stayed on until a/c unit shut off. I was so excited, but guess what. After 30 minutes the air went from 54 inside up to the high 80's within just minutes. The fan motor was still on ! I then ended up flipping off one of my 2 heat circuit breakers and this stopped the hot heat from blowing. So the a/c breaker is still on. Another breaker labeled heat is still on...the one that makes the air blow in the attic. But one heat breaker is flipped off...the one that stopped the hot air within 20 secs of flipping it off.
If I leave the purple fan motor wire where it is bypassing the defrost board the condenser fan stays on more than 20 minutes.
If I leave the one heat breaker off, the extremely hot air doesn't start to blow after about 20 to 30 minutes of turning on.
Also adding my friend told me a few days ago that the thermostat was calling for heat when it was set for ac and auto. I just replaced that 2 hours ago and then flipped my heat breaker back on. House cooled down nicely but after 30 minutes my boy was watching the digital thermometer I have in the vent. It went from 55 to 80 within a couple minutes. I sure hope one of you guys can help me. Now that I have basically eliminated my thermostat, condensor fan, capacitor, and am bypassing my defrost board to keep my condenser fan motor running. What all is left ????? I also need to add, that when I flip my thermostat to off and leave it on auto, my outside condenser fan turns off, but sometimes my blower motor in the attic sometimes will run an additional 10 minutes before turning off even though the thermostat is on off/auto. Hope this info gives you pros enough info to shoot down this problem. I will be very thankful to any help I can get.