Will Bad Blower Control Board Keep Compressor From Coming On. - HVAC - DIY Chatroom Home Improvement Forum

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Old 05-28-2012, 08:19 PM   #1
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Will bad blower control board keep compressor from coming on.

Have no air conditioning whatsoever. It is a single compressor with two zones controlled by dampers and a zone board. I suspected the zone controller board since it fails frequently and i was right. Wired upstairs thermostat to equipment to at least have ac upstairs but am getting nothing. The thermostat is calling for cooling but the unit is not coming on. I took the door off the furnace unit and found no diagnostic lights lit on the surelight board. There is 120V to the board but nothing happening. I took off the surelight board and there is a badly burned spot on one of the traces on the back. My question is will this prevent the outside unit from coming on. I can manually press the contacter and the outside unit comes on. I am going to replace the zone controller board and the surelight board but want to make sure that i shouldnt have any other issues. Thanks in advance for any help you can provide.


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Old 05-28-2012, 09:45 PM   #2
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it could....


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Old 05-28-2012, 09:45 PM   #3
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Yes, board is bad and will not be able to direct any low voltage control. Might want to check the transformer as well.
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