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Anonymous Posted on Nov 13, 2008

On off cycling, little air flow, little heat

My Carrier 58MVP furnace seems to cycle up and down frequently. When it cycles up the air flow from the vents seem almost non existent and the air is warm but not hot. I believe there is an issue here and what can it be?

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Anonymous

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  • Posted on Dec 17, 2008
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We had the same problem with the same furnace, CODE 32 DISPLAYED ON THE LEDS. I fixed it by cutting the air inlet pipe and using a hair dryer to supply heated combustion air to the furnace. Once I did that it started to run more and more until it finally heated the house up and works fine, so far so good.

We had a severe drop in temps, sunday it was 40 and rain and that night it dropped to -5 I suspect those conditions contributed to the problem. Wife observed this has never occurred before in 14 years of operation.

  • Anonymous Dec 17, 2008

    Nicknamee again. Forgot to add, I used the hair dryer for about 1/2 hour which must melt ice in the supply pipe. Once the furnace runs OK I remove the hair dryer and reattached the intake pipe with a hubless pipe fitting, the rubber kind with hose clamps.



    In NO WAY should you leave the hair dryer in place for anything more the melting ice in the pipe.



    I had a reoccurance tonight and the hair dryer worked again, I may have an issue with the vent pipe, angle or so cold out it's freezing in the outside portion of the pipe.

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Does the furnace stays off?.
Furnace are ment to cycle on and off because of limits .If you set to 70 furnace would cycle several times before reaching that temperature.
Just make sure your filters are clean and you got proper return air flow because lack of air flow will cause furnace to shut off sooner than normal
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