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

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My thermostat has a .8 degree swing temperature

I would like it to have a 2 degree temperature what do I have to do to get it to do that?

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The Thermostat Wizard is an interactive tool that will guide you through wiring and troubleshooting your thermostat, as well as programming it to the most comfortable settings for you and your family. Simply answer the questions from the Thermostat Wizard to correctly connect, troubleshoot and/or program your Honeywell Thermostat. You can even print the instructions and bring them right to the thermostat to help make things easier.
Go to: http://yourhome.honeywell.com/Consumer/Cultures/en-US/Support/Thermostat+Wizard/

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Posted on Mar 12, 2009

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Heat pump not keeping up to set temperature on thermostat but never drops below 63 degrees whens its 20 degrees outside.


It may be getting low on refrigerant due to a small leak. I'd have it serviced soon. When running at less than peak efficiency it will much more often switch on the heat strips and they are not cheap to operate.

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Where do I set thermostat when temp is 10 degrees outside?


Setting a thermostat has nothing to do with outdoor temperature, but more to do with what is a comfortable setting for you and your utility bill.

A common misconception associated with thermostats is that a furnace works harder than normal to warm the space back to a comfortable temperature after the thermostat has been set back, resulting in little or no savings. This misconception has been dispelled by years of research and numerous studies. The fuel required to reheat a building to a comfortable temperature is roughly equal to the fuel saved as the building drops to the lower temperature. You save fuel between the time that the temperature stabilizes at the lower level and the next time heat is needed. So, the longer your house remains at the lower temperature, the more energy you save.

Another misconception is that the higher you raise a thermostat, the more heat the furnace will put out, or that the house will warm up faster if the thermostat is raised higher. Furnaces put out the same amount of heat no matter how high the thermostat is set; the variable is how long it must stay on to reach the set temperature.

In the winter, significant savings can be obtained by manually or automatically reducing your thermostat's temperature setting for as little as four hours per day. These savings can be attributed to a building's heat loss in the winter, which depends greatly on the difference between the inside and outside temperatures. For example, if you set the temperature back on your thermostat for an entire night, your energy savings will be substantial. By turning your thermostat back 10 to 15 degrees for 8 hours, you can save about 5 to 15 percent a year on your heating bill -- a savings of as much as 1 percent for each degree if the setback period is eight hours long.
Hope this helps..........

Nov 23, 2010 | Goodman GMS90703BXA Heater

1 Answer

Hi i have a room thermostat with 4 programs per day on it. in the book it doesn't say if program 2 & 4 are the off times and if 1 & 3 are the on times. the thermostat was bought from wolseley....


On and off is determined by what temperature you set each program for. Example: 6 am - 70 degrees, 8 am - 65 degree, 4 pm - 72 degrees, 11 pm - 65 degrees. You can set the thermostat to fit your schedule and temperature preferences.  Good luck.

Jan 08, 2010 | Heaters

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When this thermostat is in the HOLD position, which cancels the programmed feature, I set the temperature to 72 degrees and the furnace runs until that 72 degree temperature is obtained. Now the thermostat...


If you still have the instructions for the thermostat, then it will show you how to get into the menu and set the swing on the temps. I would try to explain off the top of my head, but its actually quite a bit off numbers to remember. Hope it helps somehow.

Dec 29, 2009 | Honeywell Focus 6300B 5-2 Days...

1 Answer

Temperature fluctuates


Actually that thermostat is adjustable for only +/- 1 degree. I would make sure it is located close to a radiator/register, whichever you have, to help close that 8 degree variance. The thing about hot water heat is that even when the boiler shuts down those radiators are still putting off heat, so the temp can still shoot up a few more degrees after the stat has been satisfied. Is the boiler shutting down when the stat hits 71* ? If not then the stat may be bad. Honeywell carries a 5 year replacement warranty on that stat. I use the Honeywell Focus stats in almost all my installations. They are a very dependable thermostat. Feel free to ask anything else that will help solve your problem...Rob

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1 Answer

First floor of house is cold


The thermostat will turn your furnace on and off to satisfy the temperature setting at the location where the thermostat is located. If you move the thermostat to the first floor and set the thermostat at say seventy, it should keep the furnace on until the temperature near the thermostat hits seventy degrees.

Feb 06, 2009 | Honeywell Focus 6300B 5-2 Days...

1 Answer

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.

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Your filter is clogged. Not the one at the bottom of the unit.The one above the unit. It is like a raditor coils, kind of a bear to get to. We have cats and dogs the filter gets most of the hair but not all.Usualy about 6 bolts to take out.The proublem will be at the bottom of the top filter.

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1 Answer

Thermostate temperature setting wrong


Are you saying that the temperature over-shoots it's setting by 5 degrees? If so and if the thermostat has an inticipator device in it you can adjust it. After removing the cover on the thermostat, look for a little brass triangle on the lower right hand side. There will be a scale with numbers on it and they are very hard to see. This device heats up prior to shutting off the thermostat so it will not over-shoot by more than a few degrees. Move the brass triangle either up or down and let the heater cycle a few times. If the temperature swing gets worse, go the other way next time.

If the thermostat is not heat inticipated, there will be a small "Dip" switch where you can adjust to a specific degree of under-shoot.

Visit the Honeywell website and you can pull up the installation/owners manual for your model. www.honeywell.com

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