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    joehays's Avatar
    joehays Posts: 3, Reputation: 1
    New Member
     
    #1

    Feb 16, 2015, 06:44 PM
    Heat pump continues to heat house when temperature is above setting
    Hello,

    My heat pump won't stop heating my house when the temperature gets above the setting.

    Example:
    Outside temperature: 14 degrees F
    Inside temperature setting: 68 degrees F
    Actual inside temperature: 74 degrees F (and still heating)

    I have EMERGENCY HEAT on because its so cold.

    I cannot stop the heating... If I set the thermostat to OFF the system does not turn off but keeps heating. The only way I can stop the system is to flip the circuit breaker off and leave it off for at least 2-3 minutes.

    I've made no changes to the system. It's been working just fine this season until yesterday.

    Any ideas?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,379, Reputation: 2280
    Home Repair & Remodeling Expert
     
    #2

    Feb 16, 2015, 07:07 PM
    "I have EMERGENCY HEAT on because its so cold." can you explain exactly what this is? Is it a backup furnace possible gas fired
    joehays's Avatar
    joehays Posts: 3, Reputation: 1
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    #3

    Feb 16, 2015, 07:53 PM
    I'm no expert on heat pumps but as I understand it... once it gets too cold the heat pump cannot generate enough heat to heat the house. The EMERGENCY HEAT, I believe, is simply an electrical heating element inside the heat pump that generates the heat instead (when activated). It's more expensive than the heat pump but it can still generate heat when the heat pump cannot. At least, that's my understanding.
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
     
    #4

    Feb 16, 2015, 08:32 PM
    In most cases the emergency heat is electric restance coils in the air handler. When the thermostat is turned to "emergency heat" the outdoor unit is shut down & all heating is done by the electric strip heat.
    Joe, it sounds like the emergency heat relay in your air handler is sticking.
    How old is your heat pump?
    joehays's Avatar
    joehays Posts: 3, Reputation: 1
    New Member
     
    #5

    Feb 17, 2015, 10:37 AM
    Quote Originally Posted by Grady White View Post
    In most cases the emergency heat is electric restance coils in the air handler. When the thermostat is turned to "emergency heat" the outdoor unit is shut down & all heating is done by the electric strip heat.
    Joe, it sounds like the emergency heat relay in your air handler is sticking.
    How old is your heat pump?
    I'm not entirely sure how old the system is. I bought this house a few years ago but the house is 23 years old.

    I think you're right about the relay. After reseting the system using the circuit breaker I switch EMERGENCY HEAT off and reverted back to normal HEAT mode. Ever since then the system is regulating properly. Thanks for the help!
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
     
    #6

    Feb 17, 2015, 08:42 PM
    You are more than welcome. I do suggest getting that relay checked out by a local pro familiar with heat pumps & electric furances.

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