Question about Omega Trane Furnace Draft Inducer Blower 115 Volt Variable Speed Fasco # A190

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Central heat/air unit for home blows cold air

I turn the unit on. It blows heat for about 3 minutes then it turns to cold air and wont shut off, until I shut it off.

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  • Anonymous Mar 01, 2009

    I have a 1994 Trane XE90 furnace that just started doing the same thing. It will heat up and run okay for a while but after a random number of normal cycles, the blower won't shut off. I have to shut the furnace off and restart it to get any heat. Sometimes I can see the burners start to light but stop or misfire.

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Flame sensor is dirty

Posted on Aug 10, 2009

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Sounds like your drain is stop up in wich is filling your air swich up with water the causes a miss fire the indoor motor will run untill you turn it off when this happens

Posted on Mar 13, 2009

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1 Answer

My fan wonT shut off


Good Morning Judy,

I understand that the fan will not shut off on your Frigidaire air conditioning and heat, air conditioner, model# LRA18HMT2, even when you have turned your appliance completely off. I suggest resetting your appliance, by either unplugging it or shutting the power off at your home's circuit break, for 3-5 minutes. When power is restored, turn your air conditioner to any cycle and let it run for 5 minutes before turning it off. I ask that you please follow up with a comment on the post, at your convenience, to advise if further troubleshooting is needed or if your air conditioner status has changed successfully. Hope this is helpful.

-Best Regards-
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Unless we set the thermostat very high, like 80 degrees, the heater will blow cold air. When the heat does blow, it will eventually stop blowing heat and the fan will continue to blow cold air.


Check and make sure the filter is clean. This sounds like a restriction in the system. If the unit has central cooling make sure ther indoor evaporator coil is clean at the furance.The unit may be cycling the burners on and off at the high heat limit , fan/limit control. You can also eliminate the thermostst from the furance. Turn power off at the furnace and disconnect the wiring from the thermostat. Jumper the red and white wire together. Turn the furnace back on. The furance should run in the heating mode. Try this and see if the problem is still there.

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The contactor in the outdoor unit is stuck.You will need to replace the cooling contactor.I am sure it is wielded shut and thus will not turn off.

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Do you have central air? If so put the fan on auto turn AC to lowest setting fan should come on in a minute if not go outside to your condenser unit check for ice building up on the compressor or any of the copper lines if it is you need refrigerant. If not you may need to blow out the condenser with an air compressor or shut off power hose it out. Also, look for broken wires. If all else fails call your local service Provider.

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The blower motor kicks on when there has been a 24 volt control failure.

This usually means that a limit switch has tripped.

Most likely that would be a high temp limit switch or a rollout switch.

First, make sure the filters are clean. and the evap coil is clean. If eaither are dirty/clogged, it will partially block airflow, causing the furnace to overheat, causing the high temp limit to trip.

A rollout switch typically trips for three reasons.
1 flame rollout into the burner compartment due to poor airflow.
2 overheating af teh metal plate the rollout is mounted to, due to dirty, old, rusted components.
3 a bad limit switch.

If your unit has an LED light, count the flashes and it will hepl popint out the problem.
(locate the wiring diagram/flash code list, and correspond the flash count, with the code.)

First, check filters.

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Have an amana central air duelfuel heat system.when aux heat[gas] heats the house and shuts off the fans still blow for 3 to 5 minutes with the last couple of minutes being cold air which cools the...


Change your heating delay to shut off sooner, you can find this in the installation manual. Also the Thermostat may have delay after heat as well. It is true there could be many variables, but it also sounds like the Heatpump is not charged properly, you will have to have a different tech come out and check that. No need to have the installer mess your system up any further. This solution will only correct the auxilary heat, your heat pump on the other hand will require expert skills.

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Your thermostat is calling for blower, your fan relay is stuck, or that model had a time delay blower solid state board on it which had the blower relay on it, and it could be bad. I would turn the power off to all of your system for a few minutes and see if this could make something happen.

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