Question about Honeywell Programmable Thermostat Heater

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Cannot set heat setting by using "hold" feature

Honeywell rectangular Model #RTH221B. It gets stuck on temperature (65 degrees). When I set it at desired temperature (67 degrees) and push hold it keeps going back to 65 degrees. I thought setting a temperature and pushing hold would overide any programming that is set.

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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

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You can further reduce the number of furnace start and stops by increasing the offset to 2 degrees. This would work like this when the t-stat is set to 65 degrees and the room is cool:

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With a 1 degree offset, the room temperature varies +/-1 degree (about 2 degrees total). With a 2 degree offset, the temperature about varies +/ -2 degrees (about 4 degrees total).

Also, when the thermostat shut the heat off, the heat that was made is delivered to the space instead of wasted by sending outdoors - so the room will get a little warmer even though no fuel is being burned. The same holds true at the other end. When the t-stat turn heat on, fuel is burned, but there's little heat until the source has reached the optimum temperature and then the heat is delivered to the space.

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http://yourhome.honeywell.com/home/Products/Thermostats/

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