HVAC question > Georgia

Posted: 6/27/2016 7:52:09 AM EDT

Am I right about this?
I am having some issues with my outside unit not running. I am not getting the 24 volts across the coil to pull the contactor down. When I tap on the defrost board everything fires up and runs like a champ for the next 10-16 hours with out issue and hols the house temp at 74 with outside Temps in excess of 94 degs. Nothing freezes up or acts out of place. I have also been able to get it back up online by cutting breaker off for a min or so and resetting. After 5 min's or so everything fires back up and runs like a champ. The only time it is cutting out is during heat of the day. I am suspecting bad defrost board. Is there anything else that would cause this condition? Any suggestions would be great.

Posted: 6/27/2016 8:49:07 AM EDT

[#1]

Seems reasonable. I had to replace the defrost board on the old system I had at the time. Your symptoms sound familiar but I don't remember exactly what mine was doing.

Posted: 6/27/2016 11:53:16 AM EDT

[#2]

Make sure you have 24 volts coming from the tstat. Check the yellow wire ( possibly blue) from the tstat to ground also check the red wire from the tstat to ground (it should have constant 24 volts).

Posted: 6/28/2016 5:23:16 PM EDT

[#3]

do you have a deal with GA power or Sawnee EMC where they hooked up a box to your AC unit where they can shut it off? Could just be coincidence in timing of tapping on the defrost board. They also usually have a 5 min delay built into them if power is lost.

Posted: 6/28/2016 5:23:55 PM EDT

[#4]

do you have a deal with GA power or Sawnee EMC where they hooked up a box to your AC unit where they can shut it off? Could just be coincidence in timing of tapping on the defrost board. They also usually have a 5 min delay built into them if power is lost.

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