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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a 7656b gas furnace. The fan runs 30 sec during heat

Customer Question

I have a Coleman 7656b gas furnace. The fan runs 30 sec during heat cycle then goes off. I installed new fan switch that is adjustable set to lowest setting about 140. Any ideas..Tom
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Tom are we losing voltage to the motor or is it just stopping with voltage still there?

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