Ask Experts Questions for FREE Help !
Ask
    humblecl's Avatar
    humblecl Posts: 1, Reputation: 1
    New Member
     
    #1

    Jun 15, 2010, 08:11 PM
    Heil high efficiency furnace
    Have a Heil high efficiency furnace which works fine with heat and ac, but the fan will not go when thermostat is set to the on position and heat/air are off... is the a furnace problem or a thermostat problem??
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Jun 16, 2010, 06:36 AM
    It could be a low voltage wiring problem or thermostat problem. Since the blower comes on OK in the heat and cool mode the problem is the signal from the thermostat G terminal to the indoor unit. When you place the thermostat fan mode in ON the G wire sends a signal to the indoor unit to turn the fan on. Check the wiring first then if OK it is probably the thermostat.

Not your question? Ask your question View similar questions

 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

We have a heil super high efficiency furnace Model: NULK075DG05 / 867.779424 [ 1 Answers ]

We have a heil furnace Model: NULK075DG05 / 867.779424 and the red light is flashing on the control board. We have a manual but cannot find anything concerning the red light flashing and what it could mean. The furnace will start all the steps of igniting without actually igniting. We have checked...

I have a Heil DC90 Ultra high Efficiency furnace that the fan runs all the time but I [ 1 Answers ]

The fan runs all the time but the unit never lights or heats. Where are the limit swithches that might need to be re-set?

Heil 5000 High Efficiency air-conditioner will not cool. [ 2 Answers ]

Hello, Florida summers at 95-degrees are terrible, especially when your air-conditioner stops working in the middle of it. :mad: Here are the symptoms: - It's connected to a gas line. The heat works well, but when the cooling is turned on it blows out room-temperature air. - The fan on...

Briant high efficiency furnace [ 3 Answers ]

I have a Briant high efficiency furnace i.e Air tight burner compartment, inducer motor And exhaust and intake air from side of house etc. I had similar problems with my gas furnace. I was able to solve the intermittent Problem of the furnace not coming on every time the thermostat called for...

Heil High Efficiency locks out when weather is cold [ 6 Answers ]

I have a Heil Model MULK125DK03 furnace. It works fine for AC and for heat as long as the outdoor temp is above 20 degrees. When it gets cold, especially when the temp is dropping the furnace intermittantly starts, gets to main flame and locks out with the ID fan running and nothing else. I come...


View more questions Search