arcoaire 90% furnaces

Problems related to residential installations.

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arcoaire 90% furnaces

Post by pneedham » Sat Sep 10, 2011 1:44 pm

I have an arcoaire n9mp2 90% furnace . During the off cycle the inducer motor cycles on and off rapidly but in the heating or cooling stage it runs normally.
Any Ideas what is happening. I replaced the inducer motor pressure switch it still does the same thing. When I unhook the hose to the pressure switch it runs normally.

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- arcoaire 90% furnaces

Post by heatseeker » Wed Sep 14, 2011 10:29 am

it runs in the cooling stage? thats odd. could be problem with relay on circuit board or other control wiring even t-stat. call a pro might be beyond diy.

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