When your furnace is working like it should, it should give heat without generating too much disruption. While it’s expected to catch your furnace making noise as it starts up, other sounds are signaling your furnace requires immediate professional support.

Here are some of the most reported furnace noises and what they can be indicating. If your furnace is making a strange noise, our friendly heating pros are here to assist with the best furnace repair in Warminster, Pennslyvania.

1. Furnace Makes Banging or Knocking Sounds

You might have a serious situation on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be a few problems. These involve gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over time, so that’s why it’s essential to schedule annual furnace maintenance with Retro HVAC Service & Installation. One of the things our technicians perform during this work is clean your furnace’s burners. When this part gets grimy, you could hear your furnace making a loud rumbling noise after ignition takes longer than normal. The resulting gas buildup can fracture your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can discharge carbon monoxide, which is normally released outside. This toxic gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Retro HVAC Service & Installation recommends turning it off and contacting us at 267-277-3851. Significant natural gas in your furnace or a broken heat exchanger are dangerous troubles that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver heated air around your home. If the ductwork wasn’t put in properly or is getting dated, it can be noisy when your furnace is heating. This may be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Retro HVAC Service & Installation at 267-277-3851 and we’ll figure out the problem.

2. Furnace Makes a Buzzing Sound

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

Your furnace relies on an internal transformer to operate on the proper voltage. If wires or the box needs to be tightened, you might detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends hot or chilly air throughout your home, and a capacitor, which turns on 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 related to something small, like an unsecure screw, or something major, like a broken piece. In either case, we advise shutting your furnace off and calling our heating professionals at 267-277-3851 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s attempting to alert you it could use some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn down or a bearing may need to be lubed. We are aware that maintenance often slips your mind, but our technicians can get your furnace operating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You might also hear whistling while the furnace is operating if a floor vent isn’t secure. If you’ve examined your vents but are still sensing whistling, Retro HVAC Service & Installation can assist you. It’s essential to get loose ductwork fixed fast, as it can make comfort issues in your residence and drive up your heating costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal racket typically means there’s an issue with your furnace’s blower. Turn off your furnace off right away and call our pros at 267-277-3851 for help.

When you’re noticing an atypical noise from your furnace, Retro HVAC Service & Installation is here to help. Contact us at 267-277-3851 to book your furnace repair appointment now.