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

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I installed a honeywell rth2410 and with the fan switched to auto and system in off position, the fan is still running and will not **** off

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Sounds like you have 24 v going to the g terminal check that otherwise the fan relay in the furnace is stuck closed or the thermostat is defective

Posted on Apr 11, 2011

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Posted on Jan 02, 2017

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The honeywell thermostat I installed th8110r1008 system is in off also fan is in off but fan starts Up ?


There is no off selection for the fan. It likely has on or auto, but, it possibly has "circ." This will randomly bring the fan on with no call for heating or cooling. Keep your fan selector in the auto position, system to whatever you need!

Aug 07, 2017 | Honeywell Heating & Cooling

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In the zoning system cooling does not get turned off automatically


If the blower not turning off or is the condenser not turning off. Are ALL ZONES satisfied? Is fan in auto position at all zones?

Jul 04, 2017 | Honeywell Heating & Cooling

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How do you program the Honeywell RTH 2410B1019 thermostat for a heat pump.


5-1-1 Day Programmable Thermostat - Honeywell

yourhome.honeywell.com/.../thermostat/5-1-1-day-programm...

HoneywellSet the Honeywell 5-1-1 day programmable thermostat to your maximum comfort settings. Works with heat pump systems. Buy now!

Nov 18, 2015 | Honeywell Heating & Cooling

1 Answer

To turn on the air conditioner, on the thermostat do you click it to Auto and then on the other side click to Cool? Or do you click on Fan and Cool?


If you put the fan to auto, the fan will run only when the compressor runs. the other position it will run untill you switch it back to auto. Then cool unless you require heat at night or in the morning, usaually when I start cooling season the heat stays off.

Jul 05, 2011 | Honeywell Heating & Cooling

1 Answer

I'm tryingt to install RTH2410 honeywell thermostat for a central air/gas heat system. I accidentally discarded the old thermostat, because I thought the honeywell would be easier to install, but nothing...


Call 1-800-468-1502 for wiring assistance.
You probably have the wrong wire on the R terminal. Make sure that the wire on the thermostat R is the same wire that is on the furnace R terminal.

Oct 17, 2010 | Honeywell Heating & Cooling

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

heatman101

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

1 Answer

My newly installed Honeywell RTH2410 keeps running the Aux Heat and we have it set on 68 Its been like 55 outside so there is no reason for the aux heat to kick in. I followed the wiring directions, but i...


I'm having the EXACT problem. I called Honeywell. They said that there's an internal algorithm that decides when to use aux heat and that there are no user-settings to determine when aux-heat is used. I told them they have a lousy algorithm.

Jan 25, 2010 | Honeywell Heating & Cooling

1 Answer

Problem with thermostat (honeywell rth111/221). Furnace turns on evern when the switch is in the off position and with the fan switch on auto. switch the fan to on and the heat turns off. Again, all this...


should be installed with
1) red to rc and jumpered to rh
2) green to g
3) yellow or blue to y
4) white to w
to test: remove t-stat connect white and red - furnace should operate normally unitil you disconnect.
if it does replace t-stat

Oct 27, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

RTH230 thermostat, want to run fan only.


There is a switch labeled FAN with positions for Auto and On. Move the switch to On. For an owners manual go to http://customer.honeywell.com/Honeywell/getliterature.axd?LiteratureID=69-1800.pdf

Jul 09, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell digital thermostat won't turn off ac.


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.

Sep 11, 2007 | Honeywell CT87B ROUND HEATING&COOLING...

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