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My Whirlpool furnace (WFCU125D20-1A) is not working. The indicator light is blinking 3 times meaning presure switch. This has hapened in the past.

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1.when you turn off power to the unit and retry with power after two minutes does the unit fire up and is there blue flames or is it more white or yellow This could be a blocked intake or exhaust vent also gas pressure could be fluctuating from another gas appliance firing. 2. does the flame jump when the main fan turns on this could be a cracked heat exchanger which is the part where the flame blows in. let me know if this help

Posted on Jan 10, 2009

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Posted on Jan 02, 2017

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