How To Fix a Short-Cycling Furnace

  A furnace cycling on and off frequently is not a problem you can ignore. When your furnace isn’t delivering the performance it should, it’s time to call an HVAC expert who can identify the cause of the issue and apply the appropriate repairs. The longer you delay addressing the issue, the greater the likelihood the problem will worsen and cause significant damage to your system. When your furnace is short-cycling, contact the licensed and insured HVAC technicians at GreenBox Home Services by calling (859) 278-0281 to schedule service in Lexington, KY.

Inspect for Airflow Issues

Dirty filters and clogged vents are common causes of short-cycling. When filters or vents are clogged, this restricts airflow into the unit and ventilation of exhaust gases. In turn, this triggers the system to shut down. It is also possible that there are problems with the blower motor. When the blower motor malfunctions, it prevents air from blowing over the heat exchanger. When airflow issues are the cause of the problem, routine maintenance is often an effective solution.

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Reset or Replace the Thermostat

Your thermostat controls the heating system, and if it’s malfunctioning or broken, it will cause your furnace to shut off prematurely. Thermostat problems can occur due to faulty wiring, damaged circuit boards, or dead batteries. It’s also possible that the thermostat was installed in the wrong location. For example, if placed near the furnace, beside a heat register, or in front of a window, it can affect the temperature reading and cause the thermostat to turn on/off when it shouldn’t. Is it time to reset or replace your thermostat? Call (859) 278-0281 to schedule fast and reliable thermostat services.

Test the Furnace Flame Sensor

A corroded or dirty flame sensor will shut the gas valve to prevent gas from entering the home. When corroded/dirty, the sensor won’t detect the flame and will shut down the furnace as a protective measure. If a dirty/corroded flame sensor is suspected, our HVAC technicians will visually inspect it and use a multimeter to determine whether it’s functioning properly.

Consider Sizing

Your furnace may be oversized for your home. This often occurs with newly purchased systems when the HVAC company doesn’t accurately perform the Manual J Heat Load calculation. When it comes to furnaces, bigger isn’t always better, and rather than increase your comfort, it will do just the opposite. If your furnace is too large for your home, the house will warm too fast, causing the system to shut off suddenly. As your home cools down, it will initiate the cycle over again.

Schedule Furnace Repair Today

At GreenBox Home Services, our licensed and insured HVAC technicians are committed to ensuring your comfort and safety. For over 50 years, we’ve served the Bluegrass community, and it’s our pleasure to show you why we are the top choice for HVAC repairs for your friends, family, and neighbors. We service all brands, and when you choose our team, you’ll always receive expert service from background-checked and NATE-certified technicians. We even offer upfront pricing and free estimates on replacements. When your furnace malfunctions, contact GreenBox Home Services at (859) 278-0281 to schedule a service appointment in Lexington, KY, and surrounding communities.