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I can't turn on my honeywell thermostat - Honeywell Heating & Cooling

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Check the batteries

Posted on Aug 05, 2008


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Posted on Jan 02, 2017


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Honeywell thermostat blows cold air on heat

Thermostats don't actually blow anything, the heating system might though. Check the breakers for your heat system, then call a heating specialist. They're really not that expensive.

Oct 06, 2014 | Honeywell Heat/Cool Thermostat

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Installed the Honeywell RTH2300/RTH221 but the old thermostat was removed by someone else. Since the original wires were not labeled, I simply attached them to the new thermostat by following the letters...

This appears to be a thermostat installation that was made without regard to wire code. The Honeywell material I have suggests it may be necessary to check connections at the furnace end and work back to the thermostat. There may be compatibility problems between the number of wires in the old installation and terminal connections in the new thermostat. Honeywell may be able to help at 1-800-468-1502.

Oct 29, 2013 | Heating & Cooling

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:
Honeywell manuals are detailed, but each pdf file can be word-searched.
More resources:

Jun 25, 2012 | Hardware & Accessories

1 Answer

Can't get the thermostat to turn on. The batteries are good, but the thermostat won't turn on when I slide the thing from off to the heat. I have a Honeywell MPLS, MN. thermostat (this code was found at...

Try with following link:

Honeywell thermostat website: heating b>

Dec 09, 2010 | Heating & Cooling

1 Answer

Heat won't turn on!

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

Manual Honeywell How to Find Honeywell Manuals


Oct 26, 2010 | Honeywell Programmable Thermostat Heater

2 Answers

My Honeywell Programmable Thermostat RTH2410 operates intermittently, the entire unit , display and all, turns on and off at various times throughout the day.

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You need to reset the t-stat and totally reprogram it...
Look in your manual how to do that or...

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

Manual Honeywell How to Find Honeywell Manuals


Sep 13, 2010 | Honeywell Focus 6300B 5-2 Days...

1 Answer

Need oper instr for honeywell environmental control thermostat 63-4038

Type Honeywell 63-4038 in your search on home page. Select the link that starts with and your model #

Oct 31, 2017 | Honeywell Heating & Cooling

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