# How to Change the High-Heat Setting on a Thermostat
A thermostat is a temperature-sensitive device that controls a furnace and air conditioner to keep the temperature at a specific level. If the temperature rises above a certain setting, the thermostat signals the air conditioner to come on, lowering the temperature. Likewise, if the temperature drops below a certain setting, the furnace switches on to raise the temperature to the high setting on the thermostat. You can adjust this setting on a programmable thermostat at any time. The exact steps to change this setting vary by model, but the process is basically the same.
Instructions
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Digital Thermostats
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1
Remove the thermostat's front cover to gain access to the control panel, if necessary.
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2
Set the thermostat's system switch to "HEAT."
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3
Press the up or down arrow to adjust the heat setting to whatever temperature you choose. Replace the cover on the thermostat.
Mechanical Thermostat
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4
Locate the lever on the side or underneath of the thermostat.
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5
Slide the lever up or down, if it is on the side of the thermostat, to adjust the high-heat setting for the thermostat needle. Slide the lever to the left or right, if it is on the bottom, to adjust the setting.
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6
Rotate the dial to the left or right, if the thermostat is round and has a dial on its front, to adjust the high-temperature setting for the thermostat needle.
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1
Air Conditioners
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