Question about Icm 302c 302 Heat Pump Defrost Timer Control Board

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Heatpump defrost board

Unit will not run in cooling mode unless defroas board is bypassed

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REPLACE THE BOARD IS BAD ALSO CHECK FOR 24 VOLTS FROM COMMON AND RED TO MAKE SURE THE BOARD HAS 24 VOLTS.

Posted on Aug 30, 2010

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1 Answer

2005 s type jag a/c quit blowing cold air suddenly .just blows hot at any setting or on auto


hi,is this a heatpump or a ac unit only...if a heatpump ,there is a valve that switchs from heat tocool mode...go outside with unit running..put hand on big copper line,if it is hot your in heat mode..if cold your in cool mode....possible stuck change over valve if a heatpump...hope this helps...good luck...michael doctor airr appl.repair..843-384-8474...if need more assitance..call..its free...good luck

Mar 26, 2010 | Heating & Cooling

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I have ruud heatpump and it is covered in ice and it does not seem to be defrosting what could this be?


The defrost sensor attached to the outside coil is defective and or the defrost control board in the outside unit is defective.

To defrost the unit,turn the thermostat to cool and lower the temperature as low as it will go. Run in the cool mode until the coils defrost. Then return to heat mode.

Jan 16, 2010 | Ruud Heating & Cooling

2 Answers

Is it normal for fan on outside unit to be on while on heat mode


Yes, it is normal with a heatpump, you run the outside unit in cooling and heating.
It is also normal when the outside unit goes into defrost for the outdoor fan to shut off during the defrost mode and to see steam coming out of the outside unit, while it's melting the frost or ice, then the fan will come back on.

Jan 06, 2010 | Carrier XHB123D X/Y Series Heat/Cool Air...

2 Answers

Electrolux Kelvinator - Unit on defrost


When a heatpump goies into defrost, the unit is in a/c mode. and cool air is inside. You may have a bad reversing valve or bad defrost board.

Sep 25, 2009 | Electrolux E23CS75SS Air Conditioner

1 Answer

Outside fan runs all the time


Fan wired wrong to contactor. defrost board bad if it is a heatpump. outside fan relay is on board. Rusty

May 30, 2009 | Heating & Cooling

2 Answers

Heatpump A/C not working


First,Turn on the heat cycle (Not Emergency)and see if the outside unit come on,If not,and you don't have low voltage outside,Go to the inside unit and test the transformer,If you have low voltage from the transformer but not outside,It is the low voltage wires,If you don't have low voltage from the transformer,It's the transformer.If you have low voltage outside when in heat mode,but the unit won't come on,It's the contactor.Let me know if you need more help.


Please take time to rate this fixya

May 13, 2009 | Goodman CLQ36AR49 Air Conditioner

2 Answers

Heats for 15 - 20 mins then blows cool air


If the outdoor unit is in defrost mode the compressor will be running but the outdoor fan will not. You may even see some steam rising from the coils. This mode is to prevent frost or ice build up on the outdoor coil. Essentially it goes into cooling mode w/o the outdoor fan running.

Mar 05, 2009 | Goodman GPC1342H21A Air Conditioner

2 Answers

Tempstar heat pump: want to bypass defrost thermostat


Don't attempt to bypass defrost mode. If it's cold enough to use as a heat pump, it's cold enough to need the defrost cycle.

It sounds like a sensor issue, although it may be the controller board.

Unless you know how to work on equipment like this, I urge you to get a professional to service the unit for you.

Jan 22, 2009 | Heating & Cooling

1 Answer

I have Goodman combination heating and cooling outdoor unit PBB series. I am wanting to know if when the heat is on should the fan outside turn or is that only ac


If it's a heatpump, then yes the outdoor fan will turn unless the unit is going in defrost mode. But for the majority of the time a heat pump is operating in heat mode, the outdoor fan is running.

Jan 16, 2009 | Heating & Cooling

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