Question about Honeywell Programmable Thermostat Heater

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Stuck at 79 degrees

When my thermostat is turned off it still maintains a termperature of 79 degrees. When I turn it on to cool I can change the indoor temp from 79 but after 17 or 18 minutes it reverts back to 79. It won't even hold the scheduled indoor temp and always goes back to a setting of 79. I've reset the factory settings and still the same problem. Can you think of anything?

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Posted on Jan 02, 2017

Accurate Joe
  • 61 Answers

SOURCE: heat pump auxiliary heat does not turn on

Turn up your outside thermostat in the outside unit.
You should have about 3 degrees difference in one stage to the next. So I would change the thermosat with one that has three stages of heat.

Posted on Nov 30, 2008

  • 22 Answers

SOURCE: 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.

Posted on Jan 02, 2009

  • 61 Answers

SOURCE: Forced Hot Air Heating system doesn't maintain thermostat setting

It sounds like you may have issues with the furnace. A qualified professional can go over the system and the house to let you know if the system and unit are properly sized. The poor performance of a furnace can be a sign of carbon buildup in the furnace.
Good luck, hope this helps.

Posted on Jan 10, 2009

  • 137 Answers

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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SOURCE: My thermostat will not change the temp when trying to change


Posted on Jun 10, 2009

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