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Error code reference
Trane Furnace Error Code ERR 91
Communication fault-blower motor no comm response, inducer motor no comm response, loss of heat/cool demand, or loss of clock signal.
SourceTrane UHM/DHM Series Furnaces - Service Manual: Specificationsp. 34
Where this code is documented
1 manual in the MyPros+ library documents this code for Trane furnace.
Models covered by the manuals that document this code
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