Question about Honeywell CT87B ROUND HEATING&COOLING MECHANICAL THERMOSTAT - WHITE Heater

1 Answer

Honeywell digital thermostat won't turn off ac.

I justmoved in to this house and I have a honeywell digital thermostat. I can't seem to get the thermostat to turn off the ac. Even in the off position for the switch the air is still on. What can I try? I have read that you need to have the temp. set at least 6 ot 7 degrees higher so that it will turn off but I have tried that and it didn't work. I'm getting cold! Need advice.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,420 Answers

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.

Posted on Sep 12, 2007

  • Chandler Ede
    Chandler Ede Sep 27, 2007

    What did you discover? You gave me a poor rating without a solution, what gives?

×

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

No power to thermostat inside the house


Replace the 24 volt ac transformer mounted on the side of the furnace

Nov 26, 2013 | Honeywell Electronic Programmable...

1 Answer

Honeywell heat/cool thermostat keeps turning furnance on


This is not the thermostat, it is most likely the controller in the furnace.

Aug 10, 2012 | Honeywell Heat/Cool Thermostat

1 Answer

Heating won't go off


Honeywell manuals are online for all its thermostats.
Google search your model number.
Model number is on back of thermostat.
Copy following link for Honeywell resources:
http://yourhome.honeywell.com/home/Applications/FindYourModelNumber.aspx
Honeywell manuals are detailed, but each pdf file can be word-searched.
More resources:
http://www.ehow.com/how_6596826_troubleshoot-honeywell-thermostats.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Jun 25, 2012 | Hardware & Accessories

1 Answer

Our thermostat has "HOLD" on


Hi, Either push the program or resume program button... or on some you need to push the hold button again to take the hold off... Check the manual if all of this does not work... but the t-stat may be fried...

Here is a tip that tells you how to get a manual for most any Honeywell productonline...

Manual Honeywell How to Find Honeywell Manuals

heatman101

Jul 24, 2011 | Honeywell Electronic Programmable...

2 Answers

House lights dim when ac comes on since new honeywell thermostat installed. Is this ok?


Hello,

This is to tell you that the new installed honeywell thermostat as high voltage capacity, it is ok, it is not good enough, though, it as no much effect on your lighting points, but you can get a technician to see if there is a way to adjust the voltage at the thermostat.

Take care.

Jun 25, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

New thermostat..have heat but not A/C help....


What are you setting the thermostat to when you turn on the AC , if you turn on the AC and the house is warm you will need to turn the AC down to a lower setting before the the AC will start up.

Mar 14, 2010 | Honeywell Electronic Programmable...

2 Answers

A/C not turning on - Digital screen is blank


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

Jul 11, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell CT3600-AC not working


could be froze up if it is turn it off to melt ice clean unit could be low on freon or bad blower motor

Jun 17, 2009 | Honeywell CT3600 7 Day Electronic...

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

5,473 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

3335 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...