Ask Experts Questions for FREE Help !
Ask
    1dazed1's Avatar
    1dazed1 Posts: 13, Reputation: 1
    New Member
     
    #1

    Dec 22, 2009, 02:22 PM
    How to override heatpump & run gas furnace?
    We would like to override our heatpump and have the gas furnace run instead. The heatpump has a setting to instruct it to run up to a certain outdoor temperature, and once it gets lower than that then the furnace kicks in. Our thermostat has an emergency heat setting that is supposed to activate the funace, but instead it just turns off the heatpump and the furnace blower fan runs, but the gas furnace doesn't engage. If the temperature gets below about 32 degrees then the gas furnce will come on. Any ideas on how we can override the heat pump? We honestly prefer the furnace to the electric heat pump.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
     
    #2

    Dec 22, 2009, 05:51 PM
    Kill the power /at breaker,, does the furnace only now come on when calling for heat?

    When /if this works expect your heating cost to go up,, way up

    Let us know
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
     
    #3

    Dec 22, 2009, 06:50 PM

    Wm:

    This is a dual fuel set-up. Not a HP with electric back up. Way Way up doesn't apply.

    Sounds like someone didn't install a dual-fuel system correctly.

    With some Honeywell Vision Pro Stats that support dual fuel more options are available. Those stats require an outdoor sensor.

    I'd suggest either pulling the disconnect outside. Usually you pull and turn the pull out upside down, or cut the power to the outside unit from the breaker box and see if it works.

    Emergency heat should run the back-up heat, in your case gas without regard to outside temperature.

    Bet a dual fuel kit or dual fuel thermostat with outdoor sensor wasn't installed.
    1dazed1's Avatar
    1dazed1 Posts: 13, Reputation: 1
    New Member
     
    #4

    Jan 22, 2010, 06:58 PM

    Thanks for your reply... temps were cooler for several weeks, thus causing just the furnace to run and so we didn't have this problem. The past few days the temp around here has been around 40 and as a result the heat pump is being called to duty and totally failing at it's job.

    We tried the suggestion, killing the power to the heat pump @ the breaker and on the until, but for some reason this just engages the fan to run and does not fire up the furnace. HELP, please??
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
     
    #5

    Jan 22, 2010, 08:09 PM

    This still applies:

    Bet a dual fuel kit or dual fuel thermostat with outdoor sensor wasn't installed.

    Take a look at the install instructions for the first two devices on this page: dual fuel - iaqsource.com

    In a dual fuel setup, the gas heat and the heat pump should not run at the same time.

    There may be a dual fuel kit available for your furnace too.

    For the thermostat opton to work, you have to put an outdoor sensor outside from the thermostat base.

    You may need professional service for this is a complex setup.

    I can't guarantee I can find anything, but do you have a make/model # of the HP?

    Does the HP and the furnace run at the same time between two temperatures?

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!

Furnace Blower Motor Runs Constantly & Furnace or AC Won't Run [ 2 Answers ]

I have an Armstrong forced air (induced draft) natural gas furnace with central AC (made around 1990 -- Model: EG6H80DC14-1, Serial: A18315MNA). I had a problem at the end of the heating season where the blower motor would run continuously (even when the thermostat is turned to "off"). I thought...

Heatpump frozen up & gas furnace backup. [ 4 Answers ]

We have a heat pump and a gas furnace - the heat pump is supposed to act as our primary heat until temps are below 32 degress when the gas furnace then takes over. Here's the problem - the heatpump is frozen up (coils covered in thick white ice and solid ice partially covering one exterior side of...

Why does my gas-furnace not run? (fan-blower won't start) [ 4 Answers ]

Hi Why does my gas-furnace not run? (fan-blower won't start) I could not see any blown fuses or circuit-breakers; power-switch is on; I ignited the pilot-light and turned the temp to 90 in thermostat - but fan-blower did not start at all, even after waiting for 10 min; I measured voltage at fan...

Concord Gas Furnace with run time problems. [ 5 Answers ]

We have a Concord Gas Furnace that is about 3 years old. The furnace seems not to respond to the thermostat. We replaced the thermostat with a new digital one but are still experiencing the same issues. We set the thermostat to 83 just as a test. I had my wife record when the furnace came on...

GMC Gas Furnace Fan Won't Run [ 3 Answers ]

Hi, I have a friend with a GMC gas furnace that will not start. We are receiving a three blinking LED code that says pressure switch failed to close. We found this switch on the main air fan and discovered the fan will not run in auto or manual. We checked for 120 VAC output on the circuit board...


View more questions Search