5 Symptoms of a Bad Furnace Limit Switch in Doraville, GA

The limit switch of your furnace normally helps regulate the temperature for safety reasons and to ensure optimal performance. If something goes wrong with the limit switch, it can quickly have a negative effect in many areas. Let’s cover five signs that your furnace limit switch in Doraville, GA, needs a repair or replacement.

Furnace Limit Switch Trips Constantly

If the limit switch is tripping all the time, this is often a sign it has excessive wear because of extended use. You may notice higher electrical bills because the furnace short cycles often in this case.

Overheating Furnace

An overheating furnace is one of the most concerning indications of a broken limit switch. This is something to take seriously because overheating can disable the heat exchanger and lead to high carbon monoxide levels. It’s best to have a professional perform heating maintenance.

Cold Air

The limit switch helps regulate temperature. If you notice that cold air flows from the vents, the limit switch may not be working. If that’s the case, it can’t make adjustments in response to temperature changes, so the fan ends up putting out cool air before it has time to warm adequately.

Blinking Lights

Modern furnaces often include LED light systems that will blink in certain patterns to notify you of a problem. There’s typically a guide for interpreting these light patterns included with the furnace. This will let you know for sure that the limit switch isn’t working correctly.

Fan Shutdown

If there’s no air coming out at all, this means the blower fan has shut down entirely. The limit switch is normally what controls the blower fan, so if it doesn’t work, neither will the fan.

A faulty limit switch can prevent your furnace from working and even lead to dangerous overheating and gas buildup. Contact Ful-Bro Heating and Air Conditioning Inc. to schedule an appointment to repair or replace your faulty limit switch.

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