Keeping your HVAC system running optimally in your Porterville, California, home is critical to ensuring comfort and helping it to remain energy efficient. Unfortunately, even well-maintained systems can run into problems from time to time. If you hear any of the noises listed below, it is time to call in the pros.


Clanking, bumping, or rattling sounds are usually an indicator that there is something amiss with the motor or blower assembly of your HVAC system. One possible cause is the mounts on the assembly motor becoming loose, leading to misalignment. Another potential concern could be broken bearing or system components that are clanking against other parts. In either case, you should contact an HVAC technician immediately to prevent further damage.


When you hear squealing coming from your HVAC system, you will likely find that the problem is the result of a belt that has become loose or worn down. Another cause could be a lack of lubrication with the fan. During routine maintenance, a professional can address both of these issues with some minor repairs.

Repetitive Clicking

When your HVAC system powers up or down, you will likely hear a couple of clicking noises as the electrical system is triggering it to turn on or off. If you hear repeated clicking, though, that should be a cause for concern. This can be a sign that your system is having difficulty starting up, and you likely have a faulty relay or another electrical concern.


If you hear popping noises coming from your HVAC system when it starts up, or a loud banging, your furnace most likely has dirty burners. When this occurs, the gas is not ignited immediately, instead, it is building up. Then when the ignition hits it, it results in a small explosion that results in popping or banging. This can be a serious issue, and you should have a professional check it immediately.

If you hear any of the noises listed above coming from your HVAC system, contact us at 559-306-6433. One of ZONE Air & Heating Inc. Our HVAC professionals will help diagnose your problem and fix it.

Image provided by Shutterstock