Question about Heating & Cooling

1 Answer

F12 showing on thermostat screen wondering what it means its an honeywell 8yrs old

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 68 Answers

Many times an "F" stands as a reminder the filter needs changed, the 12 in this case could be a date, amount of days, or the F12 could be a code of some kind all together different, send me the model and all info you can get off the thermostat and we will see what it is.

Will

Posted on Nov 05, 2008

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,
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

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

Home furnace erratic


Did you keep the old thermostat? I prefer them. New ones want batteries, and can get complicated.

Nov 26, 2013 | Honeywell Thermostat Ct31a Heat & Cool Non...

1 Answer

Honeywell thermostat blank screen on cool


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

May 14, 2013 | Honeywell Rth2310b 5-2 Day Programmable...

1 Answer

I HAVE A HONEYWELL MANUAL THERMOSTAT NO BATTERIES ALL IT HAS ON THE BACK IS T8400C 1099 (2) 0710 1B HELP, IT DOES NOT SHOW ANY THING THE SCREEN IS BLANK


This model of Honeywell thermostat uses the 24v from the unit to power it. One of three things must have happened.

1. You have lost power to the furnace, therefore no power to thermostat.
2. You only have 4 wires hooked up on the thermostat and not 5. A lot of older homes had just 4 wire running to the thermostat, which will not work for this thermostat. You should have a wire connected to the (C) or (B) terminal on the thermostat, which ever one they have, I can't remember off hand. These are the Common terminals. They have to have the common from the furnace 24v power to operate.
3. Faulty thermostat, which will obviously have to be replaced.

Hope this helps and gets you to cooler days!

Jun 28, 2012 | Honeywell Heating & Cooling

1 Answer

My gibson furnace is about 8yrs old and it was working fine heat was on yesterday morning but last night it stopped. Changed batteries in thermostat which in new(thermostat) but no heat. Checked the vents...


Hi,
Look on the back of the bottom cover... it should tell you what the blinking means...


Here is a tip that will help you try to figure out why your furnace is not working.

Basic Furnace or Heating System Troubleshooting

heatman101

Feb 03, 2011 | Gibson Heating & Cooling

1 Answer

Honeywell DT200 thermostat is not responding to any buttons pressed. Display is showing small flame icon on left of screen and what looks like a battery in top right hand corner. Any suggestions?


The thermostat is calling for heat, and the battery icon means that the batteries are low and should be replaced. If the thermostat is wired to run on battery power alone, replacing the batteries usually corrects this problem. Hope this helps! Jim

Jan 29, 2011 | Honeywell Heating & Cooling

1 Answer

I need to replace an old Thermostat that just has 3 wires coloured Red, Blue and Yellow. The Honeywell THR830TUK Thermostat I have bought shows 5 wires on the diagram. I'm not sure which wire goes into...


The honeywell THR830TUK thermostat does not require a neutral as shown in the instructions.Connect the LIVE to terminal "1" and your YELLOW SIGNAL wire to terminal "3".
Connect your EARTH (if you have one) to the EARTH connection on the top left hand corner of the thermostat and blank off your NEUTRAL wire with a block connector.These instructions were supplied to me by Honeywell Customer Support.Hope this helps.

Jan 08, 2011 | Heating & Cooling

1 Answer

Wiring in a new thermostat


yes .common as in the netural side of the transformer x to cif not hooked up the stat will still work. and honeywell has good support for their products . Tom

Jun 20, 2009 | Intertherm P3RA-048K Air Conditioner

2 Answers

My Honeywell thermostat T874R is showing the EM heat indicator light when I turned the AC on for the first time this season--Why? House is warm but not humid.


The T874R thermostat should be a heat pump thermostat. EM means emergency heat which you obviously are not using. That means that you just need to determine if your heat strip is on while you air conditioner is working. If so you may need to replace your thermostat or you heating relay or sequencer.

May 27, 2008 | Honeywell Heating & Cooling

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

Related Topics:

221 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2046 Answers

Dan Webster
Dan Webster

Level 3 Expert

8205 Answers

Cris Sparks
Cris Sparks

Level 2 Expert

338 Answers

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

Answer questions

Manuals & User Guides

Loading...