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T8011 HONEYWELL THERMOSTAT TURNS OFF & ON

SCREEN GOES BLANK AND AIR SHUTS OFF AFTER A FEW MINUTES IT CYCLES BACK ON FOR A SHORT TIME

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Battier dead replace or their is a control wire problem check for loose connections. Tom

Posted on Jun 21, 2009

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Thermostat is not coming on we are in san antonio is there help out there for us


Reasons for a Blank Screen on a Honeywell Thermostat ...

homeguides.sfgate.com > ... > Real Estate Rental & Lease Basics
Honeywell and other brands of programmable thermostats typically show a blank ...and the batteries can no longer provide power to the screen, it will go blank. ...electrical system, a blank screen indicates there is no power going to the unit, ...

programmable thermostat troubleshoot - YouTube

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Programmable thermostat started to fail and behave erratically after being in service for a few ... My thermostat works but the remotes have stopped working. .... Honeywell CM907 Digital Programmable Room Thermostat user ...

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Heater fails to turn on it does not mean you have a faulty heating system ... 4th - Check programming on a programmable

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I have a Honeywell programmable thermostat and I have central heat and air system. When I set the heat to a temperature above the inside temperature, the heater turns on for a short period of time and then...


I would say that the problem is in the furnace, not the thermostat. The Thermocouple or other temp sensor needs replacing, the sensor that tells the furnace that it is heating. It just keeps turning off and trying again in 3 minutes cycles.

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Honeywell Chronotherm iv Plus power cuts on and off


There's a trouble shooting guide here, you need to check for the presence of 24V when it goes blank, and trace back to where it's disappearing (I assume it is losing the 24v, if not you'll need to go through the installer setup or read on...
My first thought would be to check the wiring which has been touched last if it started doing that after you had coil replaced.
As an aside I'm not sure which model you have but if it has batteries you should replace them (I don't think it does have batteries but not seen a model iv so I'm unsure)

https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-1410.pdf

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check that the replaced thermostat is the same temp degree setting of the last one

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I wonder if they shorted a wire a during install. That is where I would begin.

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Honeywell thermostat short and then went blank by mistake i short the thermostat with a wire and then became blank


Check the transformer in the air conditioner/heater. There should be a fuse on teh 24 volt side. Shut power off to the furnace. Locate and check the fuse. If there is no fuse, you probably destroyed the transformer.

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

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T8411r1028 honeywell thermostat blank screen where would fuse be?


That thermostat should get power from 24V side of a transformer in the air handler. There should be a fuse in there on the PCB, but just as likely, there may be a 2-wire sensor in your drain trap that will shut it down if it senses water backing up in the drain piping. Clear that line from the outside of your house with a shop vac, cycle the breaker for the air handler if needed. You may also be low on freon, though, so a service call might be a good idea anyway.

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Honeywell HZ7040 shuts off after few minutes


This sounds like a theromostat problem. If you're NOT still under warranty you should at least open the heater and look for the theromostat. A lot of times you can buy replacement at a local electronic or hardware store and they're easy to replace. Good luck!

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