Palatine Heating Repair Guide: The Limit Switch

As a full-service heating and AC contractor, we take pride in installing quality systems and ensuring accurate repairs. Our installers and service technicians look over your entire system to make sure that everything is in top working order. And when we service gas heating equipment, our number one concern is your safety. Luckily, gas furnaces contain multiple safety switches that help to protect your home from gas leaks, fire hazards, and carbon monoxide poisoning. But choosing professionals for the repairs, installation, and maintenance of such devices is the best way to ensure optimal safety.

Speak with a furnace safety and operation expert by calling the friendly technicians at Service King. We can service the most vital safest components of your unit too make sure your home and family stay protected.

The Furnace Limit Switch: An Important Safety Feature

One of the most vital safety components in your furnace is the limit switch. The limit switch is the control that keeps your furnace from overheating. There is a setting on your furnace limit switch past which the furnace plenum is not allowed to pass, which may or may not be adjustable. If the plenum temperature does become too high, the control shuts off the entire system. You can usually find this switch in the control board.

Sometimes, the fan switch and the limit switch are one in the same. The fan switch contains a delay which tells the fan when to turn on after the furnace has heated up. If the fan does not start up, the plenum may overheat, and the limit switch will shut off the unit.

When the furnace limit switch shuts off your unit, you’ll need a technician to help you to get your system back on and keep it on. You may not be able to turn the unit back on at all or it may just continuously shut down. The same could happen if other safety switches detect trouble and shut off the system as well. A technician is best suited to determine the source of the trouble.

Call the friendly neighborhood service providers at Service King and schedule an appointment for professional heating repair in Palatine.

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