Question about Coleman Mach III Air Conditioner

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Problem with heat pump

We have a 2008 Phaeton, with a coleman heat pump, airconditioiner combo, with a coleman mach hp thermostat. When we turn on the heat pump the fan comes on for a few seconds, then the gas tries to ignite, then it turns off, then the blower turns off. Any ideas

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  • renden Jan 19, 2009

    I have two Coleman AC units in my Seville 5th wheel. When I first turned them on, both units put out heat. Now they only blow cool air when set on the electric mode. I have checked connections, fuses, breakers and the units themselves. Any ideas. They are brand new.

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This sounds like a 4--step furnace. Step 1 ,the small ven fan turns on and proves it turnning thru the small air tube that sucks a switch close . Step 2 the spark igniter lights the pilot ...Step 3, the main gas valve opens up and dump gas in the venture tubes to heat the box up, Step 4 theres a swith in the box the when heated closes and turn the fan on! Thank-you-very-much!

Posted on Aug 28, 2008

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Posted on Jan 02, 2017

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