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no heat from heat pump airhandler blowing cold air

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Posted: Thu Apr 1st, 2010 03:30 pm

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1^st Post

tramilton
Senior Apprentice Appliantologist

Joined:	Sun Mar 11th, 2007
Location:	Rincon, Georgia USA
Posts:	4
Flavorite Brew:	diet dew
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I had a problem that in A/C mode the pump (Goodman A24-10 serial # 9712433118). wouldn't come on hence no air. I found out the delay relay was bad changed it all good. Well we had a cold snap and the opposite problem occurred in heat mode. the air handler comes on but the pump outside doesn't. I changed the thermostat out to a digital one didn't help.
P.S the whole unit inside and out was washed for spring cleaning. IE leaves removed dirt vacuumed out etc.

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Posted: Sat Apr 3rd, 2010 03:15 pm

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2^nd Post

ACtechGUY
Master Appliantologist

Joined:	Sun Sep 27th, 2009
Location:	New Orleans, Louisiana USA
Posts:	137
Flavorite Brew:	Landshark
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Sounds like you have a problem at the condensing unit outside. The first thing you should check for is voltage to the condenser. you may have a blown fuse , or a bad capacitor, or... well there is alot to go wrong with a heat pump condenser.

You will need a volt meter to do tests for voltage and other things.

Last edited on Sat Apr 3rd, 2010 03:17 pm by ACtechGUY

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Don't know much. But learned early on, once you let the smoke out of a something electrical, you can never put it back in!! :oops:

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Posted: Sat Apr 3rd, 2010 05:05 pm

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3^rd Post

applianceman18007260692
Fellow, Academy of Sublime Masters of Appliantology

Joined:	Thu Nov 17th, 2005
Location:	Mobile, Alabama USA
Posts:	1119
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understanding heatpumps

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Buy me a Beer: http://web.me.com/zenzoidman/applianceman18007260692/

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Posted: Sun Apr 4th, 2010 04:26 am

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4^th Post

tramilton
Senior Apprentice Appliantologist

Joined:	Sun Mar 11th, 2007
Location:	Rincon, Georgia USA
Posts:	4
Flavorite Brew:	diet dew
Status:	Offline

OK. Well I have a DVOM among other stuff. I have a good mech background. I am a Master Light/medium duty ASE mechanic so I understand electronics. You talk me in the right direction and we should be able to arrive at a faulty something haha. Keep in mind the air conditioner works great now, when I Switch back to air mode the compressor runs fine, cools great. Just wont run in heat mode.

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Posted: Sun Apr 4th, 2010 02:44 pm

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5^th Post

ACtechGUY
Master Appliantologist

Joined:	Sun Sep 27th, 2009
Location:	New Orleans, Louisiana USA
Posts:	137
Flavorite Brew:	Landshark
Status:	Offline

Your problem lies in the condenser. You will need to take voltage readings on the low voltage thermostat wires in the condensing unit .

You will have to determine what wires are what by reading the wiring diagram.

You will test for 24 volts ac between the 24v common wire and other wires.

In cooling mode you will see 24 volts between :
C - R
C - Y
C - O

In heating mode YOu will see 24 volts between :

C - R
C - Y

If you get those voltages to the condenser circuit board and nothing happens..... then you may have a bad circuit board(if unit does not have a circuit board then post a photo of the unit and control section so I know what parts you do have)

IF the condenser runs in cool and not in heat , then the problem HAS to be in the condenser. look for loose connections or maybe somthing that looks burnt or damaged.

Last edited on Sun Apr 4th, 2010 02:46 pm by ACtechGUY

____________________
Don't know much. But learned early on, once you let the smoke out of a something electrical, you can never put it back in!! :oops:

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