What Typically Fails On A Furnace?

furnace service

As a responsible homeowner interested in keeping their appliance in top shape, you might wonder what fails more often so you can keep a close eye on it, right? Well, plenty of things can go wrong with the furnace. Here are some common areas that can fail, as given by furnace service professionals.


The thermostat is responsible for controlling the temperature of your furnace, and it works by measuring the temperature of the air in your house and compares it to the temperature you have set on the thermostat.

If the temperature in your home is lower than the set point, the thermostat signals the heating system to turn on and start warming the air. Consequently, you have a warm, toasty house.

Like any appliance in the house, the thermostat is prone to several problems. One of the problems is the wiring problem. The wires can be old and damaged by animals, among many other issues. As you can guess, when your unit has wiring problems, there is no way it will accurately control the temperature in your house.

The thermostat can also have battery issues. Battery problems are often the leading causes of the thermostat not working, and the most common one is the battery dying due to constant use. When you notice your thermostat not working, you should check the batteries as they might be worn out and need replacement.

Other parts of the furnace, such as the display or sensor, might also stop working due to abuse or old age.

The ignition system

From its name, the ignition system is responsible for lighting the fuel in the furnace. Furnaces can have different ignition systems, such as a pilot light, continuous ignition, and electronic ignition.

The ignition system used in your furnace determines the efficiency and reliability of the appliance.

The ignition system can fail due to various factors, such as wear and tear, poor maintenance, improper installation, and electrical issues.

A telltale sign that your furnace’s ignition system has a problem is the furnace struggling to maintain a frame.

You shouldn’t ignore this problem. Instead, move with haste and fix it before it gets worse.

The burners

From their name, they are responsible for burning fuel to produce heat, which the heat exchanger picks up and transfers into the air.

In most furnaces, burners are located at the bottom of the furnace, and you control them using a thermostat.

Plenty of factors can make your burners fail to work as well as they should. These factors include dirt, dust, and other debris. If you have gone for a long time without cleaning your unit, this problem is bound to happen.

Your furnace burners will also have issues if the thermostat is malfunctioning. When the thermostat isn’t working properly, it can cause the burners to turn off or even turn on at the wrong times, leading to inefficiency and discomfort.

If you have noticed that your burners aren’t running properly, don’t ignore it—fix the problem as soon as you notice it.

The blower motor

The blower motor is responsible for circulating warm air throughout your home, and when it’s not working properly, the furnace may not effectively heat your home.

The blower motor will fail to run due to malfunctioning, faulty thermostat, tripped circuit breaker, or a wiring problem.

Sometimes you will find the blower motor running, but cold air isn’t blowing. In such a case, you might have a clogged air filter, a damaged fan belt, or a problem with your ducts.

In some cases, you might have the blower motor making noises, often due to a worn-out motor bearing, damaged fan belt, or issues with the blower housing.

Like with the other problems, move with haste and have experienced furnace repair service Long Island professionals fix the problem before it gets worse.

The flue

The flue is a pipe that vents gases from the furnace to the outside of your home. If the flue is blocked or damaged, the furnace may not vent properly, which can be dangerous.

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