Having a furnace is a great way to ensure that your family stays warm, and your home remains safe during the winter months. However, your furnace is susceptible to various malfunctions that you could encounter at various points through its lifespan. By being able to identify the source of the problem, you can take steps to fix it rapidly so that you don’t go without heat for long.
Your furnace uses an air filter to enhance the quality of air inside of your house. As this filter does its job, it eventually becomes clogged with airborne particles. This creates a solid barrier that makes it more difficult for air to pass through. That causes the blower fan inside your heating system to work harder to force air through the clogged filter.
Blank Thermostat Screen
Your thermostat is the remote for the entire heating system, and it lets you decide how the equipment should run. When you notice that your thermostat screen is completely blank and won’t turn on, it could be a couple of different issues. It’s best to start by replacing the batteries. If that doesn’t work, head to your circuit breaker, and make sure that it hasn’t been tripped. If you still have no success, it’s likely that you’ll need to replace the thermostat itself.
Frayed Fan Belt
The fan inside your furnace runs by using a belt that’s operated by the motor’s pulley. When the belt starts to fray, it will create a high-pitched squealing noise. It’s best to shut off your furnace and replace the belt. Letting it run when it’s frayed can result in the belt eventually breaking and causing more costly damage to your system.
Faulty Limit Switch
If you notice that your furnace seems to be running nonstop, it could be due to a faulty limit switch. The limit switch is responsible for telling the thermostat that the temperature has reached the desired level. When the limit switch is working correctly, your thermostat will shut off when it reaches the appropriate temperature. However, if the limit switch isn’t functioning, it will cause your heater to run continually.
Worn Ball Bearings
If you notice that your heating system is letting off a scraping noise, it’s likely that the ball bearings inside one of the motors are worn out. It’s advisable that you shut off your system right away to prevent any further damage to the internal components of your heater. In most cases, it’s best to replace the entire motor.
Door Safety Switch
Most heating systems have safety mechanisms built into them to protect anyone when they’re working on the system. One of the most common is the door safety switch. This is located on the access panel that allows you entrance into the interior of the furnace. Whenever the door is ajar, it will cause the safety switch to engage. You won’t be able to turn on the furnace until the door is adequately shut. In some cases, you may find that the door safety switch has gone bad, and it will need to be replaced before your heater will turn back on.
Flickering Pilot Light
The pilot light on your furnace should be constantly on, and it should be a blue color. If you notice that your pilot light isn’t solid and is flickering constantly instead, it could be an indication that there’s something wrong with your system. This could be anything from too much draft around where the pilot light is to a blockage of debris in the tube that delivers fuel to the pilot light. Turning the system off and cleaning out the fuel tube will usually remove stuck-on debris and allow the pilot light to go back to functioning normally.
Cracked Heat Exchanger
Another common issue you may come across with your furnace is that the heat exchanger gets cracked. Whenever you have your furnace running hotter than it should and for longer than is recommended, it can provide too much heat to the heat exchanger. This can result in stress cracks that can turn into bigger openings over time. In some cases, you may notice a crack when you’re performing maintenance on your furnace. Otherwise, you may notice that your heater constantly goes out since there’s too much of a draft going into the heat exchanger for it to work adequately.
Dependable Heating Service Resource
Controlled Climate Services is your dependable team of heating service professionals serving the Kennesaw area. We also offer cooling, indoor air quality, ventilation, and refrigeration services. Whether you need installation, repair or maintenance, simply give us a call today.