Tip & How-To about Heating & Cooling
Usually when the furnace blower motor runs all the time
The limit switch or rollout switch is usually open or bad.
The furnace board is seeing that one of those switches is open, so it brings the blower on to try to get the heat out of the combustion chamber area, so the switch will close. But if the switch is bad and won’t close, the furnace board will keep the blower running continuously.
Make sure the fan switch on the thermostat is not in the "ON" position it should be in the "AUTO" position.
Posted by Bill Long on
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