Question about Heating & Cooling
We keep getting the alert on our furnace that means ''combustion air switch failed to close''
Make sure there is nothing in the flue or intake air pipe. make sure tubing to the pressure switch is clear and that the combustion blower motor is running. If all these are okay the air switch may be bad.
Posted on Oct 05, 2009
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Posted on Jan 02, 2017
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