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I am trying to get my air conditioner to go back on. Our Magic Stat(Honeywell) model # CT3300A1009 9224. I had a display on the thermo that said low battery, so I replaced them & now I can't get anything to display on the thermo. The fan works, but the air does not kick on & the face plate says nothing.

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John

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  • 7 Answers

No LCD display would suggest bad battery, incorrect battery install, or unit not seated. Fan may not need LCD to display.

Posted on Dec 17, 2017

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5 Related Answers

cagreenw1

  • 77 Answers

SOURCE: I have a honeywell thermostat

Remove main stat from subbase. On back of main stat there are some screws used for different settings. Screw "C" if for fahrenheit and celcius. Screw in for fahrenheit and out 1 turn for celcius.

Posted on Jan 17, 2011

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Anonymous

  • 432 Answers

SOURCE: Broken air conditioner?

Try another wall outlet. You may need an extenion cord.

Posted on Jun 25, 2007

Anonymous

  • 113 Answers

SOURCE: Air conditioner not getting cold

low on freon by the time u pay someone to repair it u could buy a new one

Posted on Jun 20, 2008

Anonymous

  • 540 Answers

SOURCE: digital thermostat not working

Can you saY, Batteries!

Posted on Sep 15, 2008

Sea Breeze

John Tripp

  • 4656 Answers

SOURCE: fan not working on LG air conditioner su/sz/s3 model

Bad fan motor and or start capacitor are reasons that I suspect......Sea Breeze

Posted on Jan 31, 2009

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1 Answer

Don't remember security code on thermostat


All Honeywell t-stats have a model # and a 1-800 #. Call them! Have your t-stat apart to see the model#. Or if you don't know how to take it apart call them first. Ask Mr. Google for Honeywell customer service #. Their customer service is usually %100 in helping me when needed.

May 25, 2015 | Honeywell THX9421R5005 Prestige IAQ...

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I don't remember the security code to change the settings.


Depends on what t-stat you have. Need a make of tstat and model # or style.

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Honeywell VisionPRO IAQ thermostat. No back light. Screen shows characters, but dim. When touched, back light fails to work. All other systems function okay.


this control has an option for back light display in the set up menu. if it has never worked this may be the problem. if it did work then quit you should replace the t-stat. there are many different models as they have advanced over the years. this is a great control. see if you can find the set up manual

Oct 12, 2013 | Honeywell YTH9421C1002 VisionPRO IAQ...

1 Answer

I have a honeywell thermostat magic stat/32 model 3200. It reads celis and not farinheit. Just started doing this.


Remove main stat from subbase. On back of main stat there are some screws used for different settings. Screw "C" if for fahrenheit and celcius. Screw in for fahrenheit and out 1 turn for celcius.

Jan 17, 2011 | Honeywell Heating & Cooling

1 Answer

Unlock thermastat of honeywell


Hi,
Do not know what model t-stat you have and they are different depending on what t=stat you have...

Go here and down load the manul for you t-stat which will then tell you how you can unlock it...

Manual Honeywell How to Find Honeywell Manuals
http://www.fixya.com/support/r3894275-manual_honeywell_find_honeywell_manuals

heatman101

May 06, 2010 | Heating & Cooling

1 Answer

Replaced Bryant T-stat model TSTATBBNB001 with Honeywell t-stat


Hello,You forgot to wire the O terminal w1 witch is the reversing valve.It is important to check if old stat is using O or B in witch case B terminal=w1 leaving O unused.

Apr 21, 2010 | Honeywell Heating & Cooling

1 Answer

Housesitting. RTH111B model. I cannot keep the


That is a NONprogramable T-stat. There is no program to overide, therefore there is no need for a "hold" option. To set the temp, place the switch on the side marked

COOL
OFF
HEAT

to the desired setting, and push the up down arrows on the front until the display shows 80.

The DISPLAY will revert back to the current room temperature within a few seconds, and will keep the unit on until it reaches the desired temp.

The set temperature remains at 80, it just shows the current room temp.

Aug 31, 2009 | Heating & Cooling

1 Answer

Honeywell digital thermostat stopped working


Sounds to me like you have a low voltage short. If the stat had no display until you installed the battery means there was no voltage for the stat to work. Putting the battery in proves the stat works, no motors turning on probably leads to a blown low voltage fuse generally a blade fuse on circuit board in indoor unit. Good Luck

Jun 11, 2009 | Honeywell Programmable Thermostat Heater

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