Question about Honeywell Programmable Thermostat Heater

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Honeywell T8011R thermostat

The thermostat display suddenly went blank today. We haven't lost any power and we checked to make sure there wasn't a fuse blown. We can't get the heat or the fan to come on at all. We have the same unit upstairs and traded the units out. Both units will work upstairs but neither will work downstairs. If you can help that we be great as it is hot here and our Home Warranty company can't get anyone out until late tomorrow.

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  • Anonymous Dec 29, 2008

    We have the same problem exactly. Does anyone know if this is battery operated or not?

  • Dogface29 Feb 25, 2009

    No display on T8011R. No power outage, no breakers tripped. We have two units and both work when connected to the upstairs plate.

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5 Suggested Answers

muttandjeff
  • 359 Answers

SOURCE: Honeywell thermostat

make sure not turned on @ tstat to man ,also were you in the heat or cool mode when this occured .

Posted on Oct 26, 2008

  • 1 Answer

SOURCE: Programing a Honeywell T8011R Programable Heat Pump Thermostat

I found this link to the program manual at honeywell website:

http://customer.honeywell.com/techlit/pdf/PackedLit/69-1431.pdf

Posted on Jul 18, 2009

heatman101
  • 43501 Answers

SOURCE: honeywell t8000c display is blank, unit doesnt run

I would say that you have one of two issues. Either your thermostat is bad or you do not have 24v coming from the heating unit. In this case the problem would be in the low voltage circuit of the heater. At the heater you should have 24v AC when you place an electric meter across the R terminal and the C or W terminal. If you have no vaoltage across the R to either the C or W then you have a bad transformer or a blown fuse in the furnace. If you do have voltage ther and also at the t-stat then the t-stat has gone bad, replace it.

Posted on Nov 14, 2009

  • 221 Answers

SOURCE: I have 2 Thermostat's in my home. My heat works

Hi, sounds like you determined the problem is not with the thermostat. That leaves the furnace that serves downstairs. What type heating system do you have?

Posted on Jan 13, 2010

kingbrizzle
  • 407 Answers

SOURCE: honeywell thermostat t8400c intermittent blank screen

It actually sounds like the batteries are going dead if the 24v from the furnace are not providing the power to the thermostat.

Posted on Jan 23, 2010

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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.

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T8011r thermostat doesnt have a display, fuse is not blown out and it suddenly stopped working


Here is a link for the owner's manual. It gives several suggestions for the cause of the display being blank. Check those and let me know if that helps.
http://www51.honeywell.com/pacific/common/documents/T8000C_T8001C_T8011.pdf

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Thermostat display suddenly went blank today. We haven't lost any power and we checked to make sure there wasn't a fuse blown. We can't get the heat or the fan to come on at all.


Check the control board in your unit. There's a fuse on it. Either a small glass "buss" style or a flat blade style, like you find in a car.

Oct 10, 2009 | Honeywell Programmable Thermostat Heater

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Honeywell T8011r does not have anything on display - does not appear circuit breaker is thrown - could it be wire disconnected at the plate or is there a fuse inside the unit?


Check to see if you have power at the furnace. You thermostat is powered by 24vac coming from the furnace. You should have power on the "R" terminal.

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1 Answer

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remove the batteries and pull the metal tabs at each end stretching out a little the reinstall the batteries

Nov 26, 2008 | Honeywell Programmable Thermostat Heater

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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

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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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