Question about Honeywell Programmable Thermostat Heater

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Programmable thermostat intermittent problems...

Our programmable thermostat works great, most of the time. Sometimes, however, the unit will not shut off once the thermostat reaches the programmed temperature. (i.e. AC is set for 72, unit continues to run past 69 and does not shut off until we "override" the programmed temperature)
The programmable thermostat is a LUX version and is about 2 years old. Our ac and heater are both 6 years old.
Could we just need a new thermostat?

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  • Ned C Cook
    Ned C Cook May 11, 2010

    Does the unit shut off when the programmed temp is reached?

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  • Master
  • 1,711 Answers

Some tstats control humidity as well. Temp will over shoot set point in order to reach humidity s

Posted on Jun 24, 2017

  • Thomas Woodburn
    Thomas Woodburn Jun 24, 2017

    Some tstats control humidity as well. Temp will over shoot set point in order to reach humidity s

  • Thomas Woodburn
    Thomas Woodburn Jun 24, 2017

    Humidity set point. This is known as the temperature droop. Read your manual or send model number to be sure this is not what is happening. Good Luck

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SOURCE: loss of temperature control

Is the heater staying on all the time? Most likely cause of themostat trouble is the sensor. Try to find it and measure its resistance at different temps to verify the trouble.

Posted on Dec 31, 2007

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SOURCE: honeywell deluxe programmable thermostat 69-1402m

Solution #2 as above worked (thank you very much!) to get to the programming mode, but on mine keeping Function #13 on the default setting of "0" maintained the AIR.  Toggling the Temp button to "1" changed the system to conventional on/off at the programmed times.

Posted on Feb 07, 2008

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SOURCE: Honeywell 5+2 day programmable thermostat will keep heating to 29 degrees!

Our Honeywell thermostat is model RTH6300B. Now that the weather is getting hot, we decided to put the centeral air on. Hot air keeps blowing out. I called Honeywell several times thinking that we had fixed the problem. It still is blowing out hot air. Also, my husband checked the wires. Has anyone else had this problem? Any ideas what it could be?

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SOURCE: Thermostat temperatures not reaching preset Energy Star settings

Well with a boiler system like you have it will cost you more money to heat your house that way than if you leave it like it is. With a boiler system it takes a lot longer to heat an area than with a furnace. The best thing you can do is find a happy medium and leave it there at all times. If you read the paper work on your new thermostats they have a set procedure which tells the thermostat if you have forced air or boiler system. Do you have baseboard or in-floor heat how many zones do you have.

Posted on Jan 20, 2009

clyde2j2
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SOURCE: Honeywell programmable Thermostat won't hold time or program

Most thermostats use a six volt transformer for a power source, similar to a door bell, you can tell if yours does by looking at the wires that are attached to the thermostat.

The wires will be thin with just a single strand if you have these wires then you have a transformer, try and find the transformer (good luck) test it with a voltmeter if it fails the test that's it, if not, call the man. Probably it though.

Posted on Feb 15, 2009

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Tip

Lux Thermostat 500


The Lux 500 Thermostat is an affordable programmable thermostat that gives you a very easy way to customize your heating and cooling temperatures to your schedule. The programming of this thermostat is easily the simplest that I have found in a programmable t-stat.

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The Lux 500 series thermostats are a great economical way to reduce energy and utility expenses by raising or lowering your temperature settings a the times you set. The installation is so easy that most any DIY’er can install this thermostat. It has an easy to read display and the rotary dial makes the programming very user friendly.

A few of the other great features of this unit are, a keyboard lockout, and an air filter reminder.

This thermostat can be used on any 24v AC or 750mV single stage conventional heating/cooling system. Single stage heat pumps without auxiliary heat will also work with this thermostat.

Here is a summary of the features of this thermostat

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  • 5 - 2 Day programming
  • 4 Periods per day
  • Large easy-to-read display
  • LUX patented user-friendly Speed Dial®
  • Filter usage monitor and alert
  • Default Energy Star approved program
  • Temporary Temperature Override
  • Temperature Hold
  • Keyboard Lockout
  • Temperature Calibration
  • Swing Settings #1 - #9
  • Fahrenheit or Celsius temperature Scale
  • 12/24 Time Format
  • Low Battery Warning Indicator
  • Mercury Free


As you can see this thermostat will give you a lot of great features at an affordable price.

on Jan 16, 2010 | Heating & Cooling

1 Answer

My programmable thermostat does not work properly. When I attempt to push "temporary hold" and set a temp, it responds sometimes but will not continue to hear the house. OR it does not respond...


you should hear the themostat make a light click when it calls for heat...the hold or as you said temporary hold overides any programming you have and should maintain that temperature you are setting it on indefinetely of until the next programmed cycle... to check and make sure the unit is actually working properly try it again ... actually go after you hold the setting and see if unit is working...digital thermostat have a five minute time delay built in so from the time you press hold and raise the temperature above house temp a few degrees start a counter for 5 mins... if the unit does not come on then unplug the unit or reset breakers to heat and try again watching the unit to see if anything happens...is this a gas unit or electric unit? if the unit never responds then go to thermostat and remove cover take a small jumper wire and jump out the "r" terminal and the "w"terminal which is power and heat circuit see if it comes on if it does and should immediately as this way bypasses the thermostat operation then you have a faulty t-stat.

Jan 11, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

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

Thermostat takes too long to cool down 1 degree


Thermostats don't cool or heat. They are just the control device that tells the furnance or AC to operate and register the present temperature and tell the furnance or A/C to shut off, once the desired temperature has been reached.

Most programmable thermostats will take at least 1-2 weeks to "learn" how long to run the furnance or A/C in order to reach the desired temperatures you've programmed into it, for the time you want it be that temperature. Variables such as extremely hot days and higher humidity will also affect your cooling system.

Give it a little time to self-learn and it should adjust itself after a week or two of operation. You might want to take some time to review and familiarize yourself with the owners manual to see what Hunter advises for setting up and using the thermostat.

You may need to have your A/C checked to see if you're running low on freon, or need to have the coils cleaned, need to change the air filter, etc.

Hope this helps and best regards!

Aug 01, 2009 | Hunter Fan Company 5/1/1 Programmable...

1 Answer

My thermostat will not change the temp when trying to change


tHE TIME PERIOD SETTINGS ARE ONLY TEMPORARILY OVER RIDDEN. oNCE THE TEMP YOU SET IS REACHED AND THE UNIT SHUTS OFF IT DEFAULTS TO THE PERMANENT SETTINGS ON THE CLOCK.

Jun 05, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Thermostat not shutting off heat.


has the thermostat been programed to tell it what type of system you are using. If you look in the papper work you should find where it ells you to hold down the button lower left and top right button i think those are the two i don't have the papper work with me right now but i can get if you need more information on how to set it

Jan 21, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell rth230b won't shut off heat


Sounds like a relay sticking. Possibly in the thermostat or possibly the furnace relay at the furnace. The next time it happens, unplug the thermostat from the wall. If the furnace still runs then it's the furnace relay.

Hope that helps...

Geno

Mar 07, 2008 | Honeywell Programmable Thermostat Heater

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