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Discussion Starter #1 (Edited)
I have never been able to program a 6 year old Bryant tstat.
I have to set it manually every morning and at bedtime.
When I set the temperature on the tstat the ambient displayed temperature jumps 4 or 5 degrees when I shut the thermostat cover door.

The display also turns blank randomly and resets itself cancelling the program I have set

The Bryant heat pump model number is pictured below as is the existing defective thermostat

Do todays heat pump thermostats use standardized wire connections ??
I want to replace the thermostat with one that will work with the current bryant heat pump and would appreciate advice on what to look for before I buy one. Thanks for your help
 

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What’s the model number of the thermostat?
Your running up your energy bill adjusting the setpoint like that. Heat pumps run more efficiently when leaving the setpoint to a constant setting.
If you want to have a setback thermostat it’s best to select one with auxiliary heat lockout.
 

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Discussion Starter #3
have been unable to locate a Bryant model number displayed on front or back or wall mounting plate after I removed module from wall There were 6 male pins on the back that plugged into the wall mounting plate as shown on attached photo.
What is the auxilliary lockout feature. I was under the impression that all heat pumps have an auxilliary heat that comes on in very cold weather.
Thanks for clarifying this for me
 

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No, that’s a heat pump lockout. You want an auxiliary heat lockout. This will save you energy use.
Setting it up and down as you have been doing to save energy, will use more energy and raise your electric bill.
That’s a standard thermostat.
That unit you posted is not a heat pump.
 

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And neither is the thermostat a heat pump type.

Check to see that your problem wasn't from a poor control wire or battery connection or dying battery before assuming it's defective.

Nearly an standard thermostat will replace that one. Choose the one with the features you need but no more than that.

Your Thermostat Info
 
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