4 Symptoms of a Faulty Furnace Limit Switch in Covington, LA

A faulty furnace limit switch is a common cause of furnace trouble in Covington, LA. As a safety measure, the limit switch detects the equipment’s temperature and shuts off the gas supply when the temperature is too hot. These are common symptoms of a damaged furnace limit switch.

The Limit Switch Is in Lockdown Mode

After a furnace limit switch turns on and off frequently, its lockdown mode (also known as lockout mode) activates. This occurs when the switch detects a problem such as low gas pressure, a pilot light issue or overheating. HVAC maintenance services address many causes of overheating and minimize the chance of this happening.

The Blower Runs Constantly

Once the furnace shuts down, the heating element fails to heat up. The blower, however, runs until the home’s interior reaches the temperature setting on the thermostat. Without a warm heating element, the blower runs constantly without heating the house.

The Furnace Blows Cool Air

A faulty furnace impairs the gas supply and affects the furnace’s ability to produce warm air. As a result, the blower generates cool air and makes the indoor environment uncomfortable. In this situation, replacing, resetting or cleaning the switch resolves the problem so that the furnace once again heats your home.

The Furnace Cycles On and Off Frequently

The furnace limit switch typically cycles frequently due to a dirty air filter, blocked vents or a damaged blower motor. However, another cause is if its malfunctioning. A diagnostic service can pinpoint the exact cause of short cycling.

At Three Rivers Services, LLC, we take pride in doing top-quality work and helping our valued customers stay warm throughout the winter months. Call us today for furnace repair service in Covington, LA.

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