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Question DetailsAsked on 12/18/2017

WHY DOES MY THERMOSTAT SHOW THAT THE TEMPARTURE IN MY HOUSE IS 44 IN THE BIG NUMBER AND 85 IN THE SMALL NUMBER

MY HOME IS NOT GETTING WARM

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Well - some thermostats with 2 temperature numbers show the actual temp in large letters and the setting in small, some the opposite.


If yours (check manual) shows actual temp in large letters (44) and the desired setting (85) in small, and it is actually about 44 in your house, then your furnace/boiler is not firing up. Could be because of a problem at the thermostat or at the furnace. First thing I would look at is if the thermostat control has been properly seasonally changed from A/C to HEAT setting (and not to OFF - could be the switch, particularly if a slide switch as is normal, is not fully to the HEAT or FURNACE side so it thinks it is set to OFF), and that the batteries in it are good (may have a low battery indicator on the thermostat). Kids are also good about sliding switches and pushing buttons on thermostats, and some without protective covers can move just by brushing past them - you may need a protective locking cover over it. Or may have been messed with and needs reprogramming.


If yours instead shows the desired temp in large letters and the actual in small (so your house is currently at 85 degrees, or it at least thinks it is) then it would be targeting 44 degrees and would not come on till it got down to 44 in the house. If that is the case but it is not 85 in the house (which sounds to be the case) again check batteries, and may need reprogramming.


Batteries should be changed yearly - also check the batteries have not corroded and damaged the contacts in the battery area, which cause cause a failure.


Many also have a FAN setting - so the furnace blower runs for ventilation/air movement but the furnace does not kick on - it needs to be set at the HEAT or FURNACE or equivalent setting for the furnace/boiler to kick on.


If checking / replacing batteries / reprogramming the thermostat does not solve it, then check that the furnace has power - that switch and breaker are on, that the gas or oil shutoff valve at the furnace/boiler is on (aligned along the pipe as opposed to perpendicular to it) if someone might have moved it, and that if it has any indicator lights or LED's that at least one is on and that they are not showing a failure code. (See owner's manual for code meanings - some give error codes as a combination of colored LED's next to each other being on or off, others with a blink code - sets of different number of blinks.)


And of course, if on tanked fuel, check you are not out of fuel.


If you have other appliances running on the same fuel check if they are working - if all are out, then check for out of fuel condition at tank if on tanked fuel - otherwise contact your gas utility on conventional piped gas supply.


If these did not help, then Heating and A/C would be your Search the List category.

Answered 11 months ago by LCD




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