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

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Th8000 does not match another thermometer inside home

Am having to set heat at 74 degrees to stay warm. I have bought another thermometer to place in the same room and it reads about 4 to 5 degrees lower than the th 8000.

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Is the thermostat mounted near a lamp or other heat source?
Is the wall warm from ducts in the wall or a refrigerator on the other side?
The thermostats are usually pretty accurate. Most times I find some other influence on the thermostat causes the problem.
The Honeywell 8000 series also has a feature accessed through the installer setup menu, that will allow the temp display to be changed + or - 8 or 9 degrees.
Check the manual or Honeywell's website for a .pdf if you need it.
Hope this helps.
Matt

Posted on Jan 12, 2009

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I turned my thermostat down this morning to 68 degrees. I came back about 2 hours later to increase the temp to 70 degrees but when I push the ^ arrow instead of showing the increase to 70 it just flashes...


Since it's within 2 degrees of your setting it could be one of two things. Most furnaces run longer (pass your setting) to maintain the setting you made. Which really not a problem. However, your thermostat may need calibrating. To test this theory, place a regular wall thermometer next to your furnace's thermostat and see if the two temps match when the furnace cuts on and then when it cuts off.
If the temps are both the same, the furnace thermostat is fine.

If you're turning it down to 68, because no one will be at home during the day, just set it 2 degrees cooler than 68 degrees. You will then wind up with 68 degrees.

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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..........

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Generic instructions to set temperatures in fridges:

Many manufacturers design these appliances to operate at 0 degrees F in the freezer and 34 to 36 degrees F in the fresh food compartment.

To set the temperature correctly, fill a glass with water (8 to 12 ounces) and place a thermometer capable of indicating 32 degrees and up into the glass with water (if the temperature goes below 32 degrees, the water will freeze - so no need to find a thermometer that indicates any lower). Place the glass with the thermometer in it on a shelf and wait. Putting the thermometer in a glass of water helps preserve the temperature reading while the door is open. You can skip the water and glass if you want - but you'll need to read the temperature as soon as you open the door.

The freezer will require a thermometer capable of displaying 0 degrees F. Place it on a shelf where it can be seen readily - but preferably in the rear - between items (to prevent the warm air from driving the indicator up when opening the door to read it).

It will probably be easier to set the freezer temperature first. Adjust both the freezer and fresh food thermostats to mid-points (if the fridge is empty - otherwise skip this step). Adjust the freezer thermostat up or down as needed to reach the desired 0 degree F temperature.

Once the freezer adjustments are complete, adjust the fresh food compartment thermostat as needed up or down to reach the desired temperature for it.

If you fridge is fully stocked, it may take some time for the temperature to stabilize and warm / cool the fridge's contents completely. This is further affected by how often the door(s) are opened and for how long. 24 hours is often claimed - but you might be able to sneak an 8 - 12 hour soak before reading the thermometers.

After the temperatures are set, you may find that the lower part of the fresh food area is partially freezing - simply adjust the thermometer up *slightly* as needed.

Please rate this reply if it was helpful - good luck!

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