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Honeywell ct2700 went blank and not producing air

I was lowering the temperature, and the screen went blank and now I have no air.

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4 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

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Posted on Jan 02, 2017

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Karl Whisenand

  • 1554 Answers

SOURCE: our air conditioning was working

open the thermostat and look for batteries, 3 AA
http://www.heater-home.com/photos/2129-5b.jpg


http://www.heater-home.com/manuals/th8321u1006manual.pdf

Posted on Jun 13, 2008

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Anonymous

  • 9 Answers

SOURCE: 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.

Posted on Oct 06, 2009

Bill Long

  • 606 Answers

SOURCE: The thermostat worked correctly for months then

Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions
If you can’t find what you want, the bottom left and bottom of web
Page, they have homeowners assistance and Home products to get the help you need

Posted on May 10, 2010

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1 Answer

I bought a Honeywell RTH8500 thermostat and I can't get the temperature to go down past 75 degrees


You will need the installation book that came with the thermostat. There is a way to enter into the programming of the thermostat from the home screen. From there, you will need to find what code is the temperature settings in the manual, they are usually all 3 digit numbers. Once you find the code for the setting your looking for which is the lowest temp for the thermostat, it will have a 75 to the right of it which you can set a lower number. Sorry I do not have the manual right now to just tell you exactly how, but hope this still helps!

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I am trying to lower my temperature to cool my house but it will not go any lower than 78, is there anything i can do to reset or lower the temperature?


Hi,
Many t-stats will not let you go within less than 2 degrees of the heat set point....

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heatman101

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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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The thermostat worked correctly for months then


Go to honeywell.com
Under red welcome sign
Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
Then click on the PDF files owners manual / installation instructions
If you can’t find what you want, the bottom left and bottom of web
Page, they have homeowners assistance and Home products to get the help you need

May 10, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

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.

Jun 01, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Our air conditioning was working during the day. when one family member turned the air up from 72 to 75 she saw the screen process what she wanted and walked away. when another family member went to turn...


open the thermostat and look for batteries, 3 AA
http://www.heater-home.com/photos/2129-5b.jpg


http://www.heater-home.com/manuals/th8321u1006manual.pdf

Jun 13, 2008 | Honeywell Heating & Cooling

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