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Have a T8011R programmable heat pump thermostat. When I go to adjust the thermostat...pressing the buttons, I get no response. Will not allow me to adjust the temperature.

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Turn the breaker off and disconnect the power to the thermostat for a few seconds. Then then reconnect and turn breaker back on and try adjusting now. Setpoints Are Permanently Held In Non-Volatile Memory And Retained During Power Outages

Posted on May 03, 2008

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We installe da T8011R Programmable Heat Pump Thermostat approximately 2 years ago and two weeks ago, the a/c unit began turning itself completely off (blank screen and all) several times a day and night...


If the screen is blanking out that means that the 24 volt power to the thermostat is being disrupted.
The most likely cause is a safety switch on the secondary condensate drain line. This means that the primary drain line is almost totally clogged and that the condensate backs up enough to trip the condensate overflow switch. When it shut the system down (blank thermostat) this allows time enough for the condensate to slowly drain out and the safety switch resets itself. Clean out the primary condensate drain line (hook a shop vacuum to the line where it terminates outside and sucks the gunk out of it), this should take care of the problem. If it does not then you may have to get an a/c technician to professionally blow the line out from the air handler and possibly clean the condensate tray out in the air handler.
Hope this helps.
One note: If the safety switch was properly installed then the system would shut off and never come back on until the drainage was corrected. Yours is obviously not installed properly.

Sep 10, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

I have Honeywell T8011R programmable Thermostat. Turn AC on last night for first time...working fine...came back late morning to find display and fan off. Check circuit breaker...on. I took it off and...


Hello, first you must verify if you are getting 24 volts to the tstat at the secondary side of the transformer, if not you have a bad transformer. If you are getting 24 volts then check the batteries in the thermostat.

Apr 12, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

How do you reset the unit so it is no longer on program mode


From the Operating Manual: Manual Operation for Non-Programmable Thermostats Press the SYSTEM button to select Heat or Cool and use the [Up] or [Down] buttons to adjust the temperature to your desired setting. After selecting your desired settings you can also press the SYSTEM button to select AUTO to allow the thermostat to automatically change between Heat and Cool. Manual Operation (Bypassing the Program) Programmable Thermostats Press the [Up] or [Down] buttons and adjust the temperature wherever you like. Then press HOLD. This will override the program. The HOLD feature bypasses the program and allows you to adjust the temperature manually, as needed. Whatever temperature you set in HOLD will be maintained 24 hours a day, until you manually change the temperature or press RUN to cancel HOLD and resume the programmed schedule. ____________________________________________________ *Disclaimer: I am not a lawyer, despite the handle. Words to live by: "Every creative act results from a sudden cessation of stupidity." -Edwin H. Land, inventor of the Polaroid Land Camera "The problem can always be solved with the materials in the room." -My college Physics Lab Professor

Jan 22, 2011 | White Rodgers White-Rodgers 1F85RF-275...

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Hi. I am just wanting to control the heat the manual way. I had someone come in to service my furnace and they set it for the week. How do I cancel that, and just have it so I can turn it up when I want,...


From the Operating Manual: _______________Manual Operation for Non-Programmable Thermostats Press the SYSTEM button to select Heat or Cool and use the [Up] or [Down] buttons to adjust the temperature to your desired setting. After selecting your desired settings you can also press the SYSTEM button to select AUTO to allow the thermostat to automatically change between Heat and Cool. _______________________Manual Operation (Bypassing the Program) Programmable Thermostats Press the [Up] or [Down] buttons and adjust the temperature wherever you like. Then press HOLD. This will override the program. The HOLD feature bypasses the program and allows you to adjust the temperature manually, as needed. Whatever temperature you set in HOLD will be maintained 24 hours a day, until you manually change the temperature or press RUN to cancel HOLD and resume the programmed schedule. ____________________________________________________ *Disclaimer: I am not a lawyer, despite the handle. Words to live by: "Every creative act results from a sudden cessation of stupidity." -Edwin H. Land, inventor of the Polaroid Land Camera "The problem can always be solved with the materials in the room." -My college Physics Lab Professor

Jan 19, 2011 | White Rodgers White-Rodgers 1F85RF-275...

1 Answer

My Honeywell Thermostat Mdel # T8011R displays all the icons at the same time. This occured when returning from an electrical outatge.


After being disconnected from the expert, whom wasn't of any help, I called our AC/Heater maint. person for service. Upon hearing the problem he told me to turn the power source off for at least 30 minutes. After restoring the power source everything worked fine. The secrret is leaving the source off for at least 30 minutes. Your expert advised to turn the source Off and then back On which didn't solve anything. This remedy may work with other Honeywell models as well.

In all due respect, I hope I'm not charged for the lack of results which your expert provided.

Frank Mooney

Jan 27, 2009 | Honeywell Programmable Heat Pump...

2 Answers

Honeywell T8011R


Check for either an in-line fuse in the heating unit or a fuse on the control board also in the heating unit.

Nov 06, 2008 | Honeywell Programmable Thermostat Heater

2 Answers

Battery backup?


which model do you have ? the 8000/8001 or 8011 the set is different depending on your type of heating system. This model has a memory chip not a battery that saves your settings. So you could be looking at replacing the unit.

Jan 05, 2008 | Honeywell Programmable Thermostat Heater

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