When your furnace is working correctly, it should provide warmth without generating too much noise. While it’s normal to catch your furnace making noise as it starts up, other sounds are indicating your furnace should get immediate professional help.

Here are some of the most common furnace noises and what they might mean. If your furnace is making a strange noise, our friendly heating pros are here to assist with the best furnace repair in Portland, Oregon.

1. Furnace Makes a Banging Sound

You could have a critical situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be a couple of problems. These involve gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over the years, so that’s why it’s important to set routine furnace maintenance with D & R Heating & Air. One of the jobs our professionals perform during this work is clean your furnace’s burners. When this piece gets grimy, you could hear your furnace making a loud rumbling noise when ignition is delayed. The resulting gas buildup might fracture your furnace’s heat exchanger, where natural gas transforms into warmth. Any cracks in it can emit carbon monoxide, which is normally emitted outdoors. This hazardous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, D & R Heating & Air advises turning it off and reaching us at 503-678-2517. Too much natural gas in your furnace or a ruptured heat exchanger are dangerous troubles that require immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move warm air around your residence. If the ductwork wasn’t put in right or is getting dated, it can be loud when your furnace is on. This may be the issue if your furnace makes a banging noise when it shuts off. Call D & R Heating & Air at 503-678-2517 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound often indicates an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to work on the right voltage. If wires or the box is loose, you might detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves heated or cooled air around your house, and a capacitor, which triggers the motor. If either of these parts are going out, they will buzz when the furnace turns on.

3. Furnace Rattles

If your furnace is making a rattling noise, it may be due to something little, like an unfastened screw, or something serious, like a broken part. In either case, we urge you to shut your furnace off and contacting our heating specialists at 503-678-2517 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s attempting to alert you it requires some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn out or a bearing might need to be lubricated. We know that maintenance often slips your mind, but our technicians can get your furnace running quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re hearing your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You could also hear whistling while the furnace is operating if a floor vent isn’t secure. If you’ve checked your vents but are still sensing whistling, D & R Heating & Air can provide support. It’s essential to get loose ductwork repaired without delay, because it can make comfort troubles in your residence and inflate your utility expenses.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal sound usually means there’s an issue with your furnace’s blower. Turn off your furnace off instantly and reach our pros at 503-678-2517 for help.

When you’re hearing an uncommon noise from your furnace, D & R Heating & Air is ready to help. Contact us at 503-678-2517 to schedule your furnace repair appointment right away.