Dealing with a Heater that Cycles On and Off Too Frequently

Cooler weather has arrived in Lorton, VA, and freezing winter temperatures will soon be on the way. If you’re dealing with a heater that cycles on and off too frequently, this could affect both your comfort and your energy bills. Read on to learn about the common causes of frequent heating cycles and what you can do about them.

Thermostat Problem

The thermostat is like the brains of your home’s heating and cooling system. A thermostat malfunction could be the reason for frequent heating cycles. Check the thermostat’s power. If you have a smart or programmable thermostat, it might need a new battery. If its battery has at least a 50% charge, verify the thermostat’s settings. If they look right, your thermostat may need a diagnostic checkup. It could have a loose or damaged wire that needs to be repaired or replaced.

Low Airflow

Low airflow could cause your furnace to shut off quickly. If the hot air gets trapped in the combustion chamber, its safety valve may trigger it to turn off. A dirty blower wheel can also cause rapid heater cycling. Closed or blocked supply vents may interfere with the thermostat’s ability to detect a temperature change, so it will tell the heater to cycle again. A dirty air filter could also cause low airflow. According to Energy Star, you should check the air filter once per month. If it’s dirty, remove and replace it. Put in a new filter at least every three months.

Malfunctioning Flame Sensor

Gas furnaces keep a flame going. If the flame sensor is dirty or broken, it will shut off the gas supply to the furnace. That happens for safety reasons. When the gas valve turns off, your furnace shuts down. This issue requires professional maintenance or repairs.

For more details about frequent heating cycles, take a look at Commonwealth Cooling & Heating, LLC’s professional HVAC services, or contact us today for additional information.