Question about ICM286 Furnace Control Board
Hello, Often times the clarity of the "C" terminal is faint in the instructions. The "C" terminal should be naturally grounded from the transformer. So yes make sure it is grounded. Double check that the "C" is constant from furnace to thermostat to outdoor unit.
Also make sure the furnace is properly grounded.
Holle back if needed.
Posted on Oct 19, 2013
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Posted on Jan 02, 2017
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