The Impact Of A Dysfunctional Thermostat On Your Heating Unit

3 October 2022
 Categories: , Blog


A thermostat is a crucial device that displays the ambient temperature and allows you to adjust it to the desired level. And so, your heating appliance's performance may decline if the thermostat happens to fail. 

Moreover, you may incur hefty utility bills as your furnace overworks to heat your home adequately. Thus, you should contact a heating contractor to diagnose your unit for malfunction and remedy it. Below are ways in which a defective thermostat impacts your furnace.

Little To No Heating   

If you erroneously change the programming, you may prevent your furnace from heating. For instance, the system will run fans to cycle air when you switch to fan mode. As a result, the fans will blow the air at room temperature as this setting turns off the heat. In addition, a defective thermostat will result in uneven heating of your home. Therefore, you should engage a professional to replace the thermostat. They will also ensure the furnace runs for longer intervals to heat your house uniformly.


A defective temperature regulator will cause your heating unit to short-cycle. This occurs when the regulator senses constant temperature fluctuation and conveys wrong signals to the furnace. Consequently, the thermostat will shut down the compressor before finalizing a heating cycle and turn on eventually. This leads to the furnace components wearing down quicker, exposing your unit to breakdowns. Thus, hiring a heating contractor to replace your thermostat is essential to prevent short cycling.

Thermostat Forgets Programmed Settings

If your regulator keeps resetting, rebooting, or randomly changing, it could be defective. This might be due to a significant voltage spike that causes the thermostat settings to scramble. Since you want to maximize your home's temperature control, you should engage a furnace specialist. They will install a new and compatible thermostat with high voltage protection to prevent it from malfunctioning.

The Heating Unit Won't Turn On

When your temperature sensor loses connection to the furnace, it may render the unit inoperable. As a result, the thermostat will not prompt the unit to respond to temperature changes. Therefore, you should engage a technician to change your thermostat and fix the wiring correctly. Furthermore, they will ensure your furnace and the thermostat are compatible.

A defective thermostat will bring discomfort and reduce the furnace's efficiency. Thus, you should schedule regular furnace maintenance with an HVAC contractor to ensure your thermostat is in good working order. 

Contact a local HVAC contractor for more info.