I have an American Standard high efficient split system unit. Two HVAC people have looked at it and cannot figure out why it wont work when it is connected properly. If you disconnect the tubing from the combustion chamber it works fine, but when the tubing is connected it cycles on-off erratically. The model # is ady120r9v5v3

Asked by John on 01/02/2014 0  Answer

ManualsOnline posted an answer 10 years, 10 months ago

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