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Heating · Massachusetts

Thermostat Not Working

A dead or unresponsive thermostat can mean the heating system underneath it is fine and just isn't being told to run, so a call sorts out which side the problem is on.

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When this becomes an emergency

What a pro does

A blank thermostat is often just batteries. Beyond that, a technician checks the low-voltage wiring between the thermostat and the equipment, since a loose or corroded connection at either end can make a perfectly good thermostat look broken, and on older systems being converted to a smart thermostat, a missing common wire is one of the most frequent causes of a unit that won't power on at all. A thermostat reading the wrong temperature is usually a placement problem: sitting in a draft, in direct sun, or near a heat source throws the reading off. Replacing the thermostat won't fix a wiring fault underneath it.

Frequently asked questions

Yes, it's the single most common cause and the easiest thing to rule out before assuming anything else is wrong.
Many older systems don't have the extra common wire smart thermostats expect for constant power, and without it the thermostat can brownout or reset instead of holding a steady call for heat.
It does. A thermostat near a heat register, in direct sun, or on an exterior wall reads a temperature that doesn't match the rest of the house, which throws the whole schedule off.
Not necessarily. An unresponsive thermostat and a genuine furnace fault can look identical from the living room, which is exactly why a technician checks both sides rather than assuming one.

Thermostat Not Working?

Get connected with a local pro now.

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