Question about Honeywell Programmable Thermostat Heater

2 Answers

A/C not turning on - Digital screen is blank

I have a Honeywell Thermostat, Part# T8411R1028. The digital screen is blank. When I flip the fan or system controls on, nothing is happening. I turned the breakers to the A/C unti and flipped the main breaker to the house off and on again, but still nothing. Please help.

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 520 Answers

Your honeywell should have battery back up but the primary power for this is a 24 volt transformer located in the air handler probably in your attic. All these controls run on 24 volts

Posted on Jul 11, 2009

Ad
  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 9 Answers

Check the water sensor in your drain piping if you have one. If it's sensing water backing up, it will blank that display.

Posted on Oct 06, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

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

? 3:35
https://www.youtube.com/watch?v=pNVTAUcBx-U
Sep 26, 2011 - Uploaded by Maxxmentum
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 ...

HEAT WON'T TURN ON How Test if your Thermostat is ...

? 2:36
https://www.youtube.com/watch?v=lSJn69EAcAw
Nov 16, 2014 - Uploaded by You can Fix It!!!!
Heater fails to turn on it does not mean you have a faulty heating system ... 4th - Check programming on a programmable

Jan 10, 2016 | 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

How to remove thermostat cover to replace


the cover pulls off if it has a green screen then most likely takes batteries if does not light up then no batteries with a small piece of insulated wire jump from green to red if indoor fan does not come on then transformer bad

May 15, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell Digital Thermostat won't click on if temp is below 59


do you live there? if so here are the rules for setting back temperature: do not lower the temperature more than 8 degrees F from the temperature you want it when your there, setting it back for periods of less than eight hours is also somewhat futile. Due to laws of thermo-dynamics the heat required to recover from more extreme setbacks or shorter periods of time exceeds the savings acquired by taking said action. As to your question directly there are no reasons why your thermostat should not function at any setpoint temperature that it is allowed to set to (45 normally being the lowest) if it does not function below 58 degrees it has a failure and should be replaced before it fails completely. Suggest a Robertshaw or Braeburn brand thermostat, Honeywell quality has slipped over the past decade to unacceptable levels. Unless your considering a Hunter in which case buy another Honeywell.

Dec 17, 2008 | Honeywell Programmable Thermostat Heater

2 Answers

T8411r1028 honeywell thermostat


Check in the heating unit itself for an automotive style fuse.

Dec 17, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell digital thermostat won't turn off ac.


The Honeywell CT87 thermostat is a normal round thermostat, not digital and may have a sub-base installed with it that has a two switches on it. One is for Fan (Auto or On)and the other is for Heat, Cool and Off. Make sure the Fan switch is in the Auto position and the other switch is in either the Cool or Off mode. If you continue to get cooling, you have a short in the thermostat wire or a stuck relay in th indoor or outdoor unit. To test this, while the unit is running; remove the round outer ring on the thermostat by pulling it straight off towards you. You will find 3 slotted head screws that hold the thermostat to the sub-base. These screws are located at the 3 o'clock, 7 o'clock and 9 o'clock positions. Turn these screws counterclockwise with a small head screwdriver. They are held in place so should not fall and get lost. With the front of the thermostat removed from the base, the air conditioner should stop running. If the unit continues to run, you will need to have your A/C system inspected by a technician. If in fact your thermostat is digital, look to see how it is mounted to its sub-base and remove it. If the system stops, you may have a bad thermostat or the Fan switch is in the On position. Hopefully this will help.

Sep 11, 2007 | Honeywell CT87B ROUND HEATING&COOLING...

Not finding what you are looking for?
Heating & Cooling Logo

1,446 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honeywell Heating & Cooling Experts

Bill Long

Level 3 Expert

588 Answers

Paul Carew

Level 3 Expert

3328 Answers

vance jones

Level 2 Expert

120 Answers

Are you a Honeywell Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...