Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Honeywell Chronotherm III Emer. Ht button keeps flashing

The emergency Heat button keeps flashing red. What is causing this and how do I fix it?
Thanks,

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  • 11 Answers

Change the batts on the stat

Posted on Jul 07, 2008

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Posted on Jan 02, 2017

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Display shows LLL


PDF]Chronotherm III 7 Day Programmable Thermostat - Honeywell

https://customer.honeywell.com/resources/techlit/.../69.../69-0352.pdf
O I" O 0. HEAT M10 COOL OF ow to operateyo. This Owner's Guide will show you how to get the most benefit from your new thermostat. Your new Honeywell ...

Sep 13, 2015 | Cars & Trucks

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My honeywell chronotherm III says -AC any ideas


The problem is your 24v power source. I am unsure as to why you put "other than power source or batteries". If you did indeed check that your thermostat is receiving 24v, then I would say that you have a bad thermostat. Hope this helps

Jan 22, 2010 | Heating & Cooling

2 Answers

Chronotherm III...Replace Battery notification blinking...replaced twice with the appropriate batteries, turned the correct way. Cleaned off the battery terminals and still have replace battery...


Thermostat problem; Honeywell chronotherm lll ' Low Batt. indicator Keeps blinking after Batteries replace. I chk'd batt. with elect. volt ntr. Was told to pull batt. and change ends with them , letthem stay reversed for 5-10 sec. then put them back in right order,and replace thermostat. No success!
Anyone have any answers

Nov 12, 2009 | Honeywell Power Humidifier: Furnace...

1 Answer

Thermostat does not read current settings or respond to commands.


HONEYWELL WEBSITE:
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

Oct 08, 2009 | Honeywell Power Humidifier: Furnace...

3 Answers

Replacing aging erratic honeywell chronotherm III


Hi, your replacement part can be purchased on amazon, take a look here: Amazon com honeywell chronotherm III thermostat. I hope this was helpful. Cheers

Nov 30, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Replacing thermostat for central heat and air/ not humidifier


rh and rc should have a jumper between them.connect red to either.y=yellow g=green w=white and do not use the blue.your new stat will run on batteries.

May 26, 2008 | Honeywell Power Humidifier: Furnace...

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