Heat pump icing up

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Old 12-31-12, 03:43 PM
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Heat pump icing up

Had a new compressor, and switching valve put in last summer.

A/C works well.

Heat Works well.

It ices up, and doesnt appear to defrost.

Ive been reading forum and after forum and youtube, and see lots of great info but nothing seems to apply to my Ruud setup or has any good pics.

I looked around, my thermostat for the defrost bored had fallen off, so i zip tied it back on. I shorted the test points on the board, nothing happened.

When the unit is NOT running the red LED is on. When the unit is on the red LED os OFF.

Unfortunately as you can see it has had many different people working on it and their idea of wiring each is different.

SO, is my defrost board hooked up right? I have no idea due to wire colors. there are so many wire nuts etc...
 
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Old 12-31-12, 03:48 PM
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all the wiring.................
 
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Old 12-31-12, 03:52 PM
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Defrost board..............
 
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