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Alltek Services Blog

Why Does Your Heater Sound Like That?

Your heater might be calling for help by making weird sounds. Try not to ignore it. While most of the sounds you will hear are not cause for concern, it is still a good idea to be cautious and regularly inspect the heater if something goes wrong. Besides, you don’t want to freeze during the peak winter months.

Here, we have outlined seven weird heater sounds you may encounter:

1. Screeching

Screeching sounds usually result from issues with the belt, motor, or bearing inside your furnace. This sort of sound might not be troublesome in the beginning. However, it can cause bigger issues if left unattended for a long time.

2. Chirping

Chirping is one of the most common heater sounds. You will usually hear it when your furnace or other heating unit has not been in use for a long time. Usually, it is an indication of the heater warming up. After it has completed the warm-up, the noise might go away. In case the sound does not go away or gets worse, it may be a sign that you need a belt replacement.

3. Rattling

If your furnace or boiler has a loose panel, you might hear a rattling sound every time you start it. Sometimes this heater sound can be easily avoided by tightening the cover panels. The sound could also result from the furnace expanding and contracting metal parts as the temperatures shift. Nevertheless, if you continue hearing the sound, there might be a serious problem with your furnace, and the best thing to do is take assistance from a professional.

4. Clanging

Clanging sounds come from the vents, metal housing pipes, and other parts in the furnace as they heat up or cool down. These sounds can usually be heard when you start the furnace or just after it stops blowing warm air. These are normal.

Or, this sound could be representative of a part coming loose inside your system. Call us if it sounds loud or uncomfortable.

5. Knocking

You might hear a knocking sound coming from your furnace when the belt is cracked or damaged or when the bearings have gone bad. The best thing to do in this case is to seek a professional’s help.

6.”Boom” or “Bang”

There are three reasons why you might hear a boom or a bang coming from your heater. The first instance is when your gas heater is having a delayed ignition problem. This occurs when the gas builds up in the furnace before igniting, which causes a tiny explosion that could be harmful to the heater.

The second reason why you might be hearing boom or bang sounds is because of the contraction and expansion of the metal ductwork when the blower starts. Change your air filters and confirm that your supply vents are clear to solve this issue. The last reason could be a dirty or misplaced air filter.

7. Humming

You might hear a humming sound coming from your heater when there is a problem with the motor. If you face this problem, try turning off the heater and let it cool off. After it cools down, inspect the system for issues. The humming could be because of a lack of lubrication, which we can help with.

Another case in which you might hear a humming sound is when there is a problem with the motor’s capacitor. In this case, you may need to replace the motor to get rid of the problem.

Final Statements

HVAC systems are complex. The same is the case for heaters. In case you encounter a problem, seek help from a professional for repairs or maintenance and installation.

If you are a Georgetown resident, seek help from Alltek Services for Heating Repair in Georgetown, TX. These professionals will take care of these weird sounds in an instant.

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