Question about Heating & Cooling
Outdoot unit code u4
Posted by Anonymous on
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Posted on Jan 02, 2017
Sounds like an interconnecting wiring error. Check wiring connection i.e. wires are connected in right order 1 to1 2 to 2 etc. from indoor terminal board to outdoor terminal board. Also check for slack or loose connections.
Posted on Feb 08, 2011
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