Question about Honeywell Programmable Thermostat Heater

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Heating not getting to the set temperature

We have Oil Heat. Temperature adjusted using digital Honeywell Thermostat (Model # CT3600A4444). The furnace comes on and shuts off frequently.

How do I resolve the issue. It is freezing inside.

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  • en1091 Dec 21, 2008

    I had heat on Aux. Heat, and the temp. dropped by 10 degrees inside overnight. Now I have it on Em. Heat waited for an hour. It did nothing. I want to get warm!

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Clean or replace your air filter

Posted on Dec 21, 2008

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1 Answer

My round non-programmable digital thermostat doesn't seem to be communicating with the heater very well. I set it to 70 degrees and it clicks off before reaching that temperature. Any ideas?


It sounds like you may have a round Honeywell thermostat. It could be that the temperature pointer you see on the face of the thermostat just needs to be adjusted. The next time your furnace or AC finishes running, remove the face off the thermostat and use a small screwdriver to set the dial so the pointer temp matches the other temperature indicator.

Oct 29, 2013 | Honeywell Thermostats

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My thermostat when prgrammed and set on "auto" mode kicks on heat when temp drops below set temperature. The problem is that after warming up to that temperature...it does not shut the fan off. ...


I have a honeywell TH8320U thermostat and American standard Air handler with heating unit put in. THE thermostat works fine with the ac and follows the programs I have set. However the heat is a different story. The thermo clicks on to follow program but the unit does not run. (auto settings) If I place the thermo in heat and turn it to on I get heat?

Dec 08, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

My round Honeywell T-87 on the main floor(middle) of the house has no ON/OFF switch. It controls the temp of that level of the house and even though it is set at 60, the temp is way too high and reads 74....


What you are describing is the Heat Anticipator. It is a small resistor that helps the thermostat from overshooting the set temperature by heating up and shutting off the thermostat just before your set temperature. I don't think that is related to your over heat. 14 degrees is a lot and the Heat Anticipator will only effect it 4 or 5 degrees. I would remove the thermostat and check if there is a call for heat. If so, you have a shorted wire. If not, replace the thermostat.

Dec 30, 2009 | Honeywell Programmable Thermostat Heater

2 Answers

Honeywell RTH2310 thermostat temp variance


Hi,
Yes you can change that by change the number of cycles per hour that your t-stat looks from for youe furnace. Lower the cycles per hour number and it will increase the range.

You can see how to do it here

http://dl.owneriq.net/3/39359643-dfda-451d-bb81-828eecddd9fc.pdf

I hope that this will help you to solve your problem!

Thanks for using Fixya!!

Heatman101

Dec 12, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Incorrect ambient temperature on Honeywell Model RTH221B


Check in your manual for the thermostat. By pushing a combination of buttons you can get into the advanced installer menu. From there you can make an adjustment to correct the temperature.

Nov 11, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Cannot set heat setting by using "hold" feature


make sure it is not telling you room temp, some of the Honeywells, will display room temp over desired temp. check that, if it wont let you switch temp than buy a new one, if you dont have a heat pump a new cheap stat is around 20.00.

Dec 31, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell Digital Thermostat won't click on if temp is below 59


do you live there? if so here are the rules for setting back temperature: do not lower the temperature more than 8 degrees F from the temperature you want it when your there, setting it back for periods of less than eight hours is also somewhat futile. Due to laws of thermo-dynamics the heat required to recover from more extreme setbacks or shorter periods of time exceeds the savings acquired by taking said action. As to your question directly there are no reasons why your thermostat should not function at any setpoint temperature that it is allowed to set to (45 normally being the lowest) if it does not function below 58 degrees it has a failure and should be replaced before it fails completely. Suggest a Robertshaw or Braeburn brand thermostat, Honeywell quality has slipped over the past decade to unacceptable levels. Unless your considering a Hunter in which case buy another Honeywell.

Dec 17, 2008 | Honeywell Programmable Thermostat Heater

3 Answers

Dy/night heater turns on for 10 sec then and off, over and over


Hi and welcome to FixYa,

If I understand your concern, it is that the heater switches itself on for 10 seconds and then switches itself automatically off. A couple of ideas of you may want to explore/check:
  1. the built-in protection system detects an internal fault and to prevent any further damage switches itself off;
  2. the faults could be:
  • open heating element (assuming it is electrical);
  • blower not turning;
  • open limit switch. The limit switch is an inline cutoff to the heater that automatically opens up when the heater exceeds a pre-determined temperature independent of the settings in the thermostat. This is like a thermal fuse once gone bad will remain open;
  • whereas a thermostatic switch will turn on if temperature is below its threshold and turn off if the temperature is above. It is basically an on/off switch.
Often the limit switch would look like the image below.
7d0829b.jpg
To be able to provide a more detailed information/assistance, pls verify & post back the model number of the Day Night Heater. Model 8ou-19 does not turn up anything. Or perhaps you can share the website you were referring to.

Good luck and Thank you for using FixYa. Happy Holidays.

Dec 16, 2008 | Honeywell Programmable Thermostat Heater

2 Answers

Program manual for honeywell thermostat model T8700C1005(1)


go here: http://yourhome.honeywell.com/Consumer/Cultures/en-US/Products/Thermostats/

Nov 13, 2008 | Honeywell Programmable Thermostat Heater

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