Furnaces and boilers often become noisy when they require repair, but the different sounds they emit can indicate various problems that need attention. The next time you notice a bang, rattle, or click when your furnace is operating, consider these reasons to contact a furnace repair specialist.

Which Sounds Indicate Furnace Repair Is Needed?

1. Banging

If you hear a loud bang when your furnace starts up, it’s a sign your gas furnace is experiencing a delayed ignition. The burner might struggle to get hot enough to combust the fuel. This is usually caused when burners become clogged or gas pressure is too low.

If you hear a banging noise when the unit shuts off, the heating ducts are shifting from temperature changes. An HVAC contractor can inspect your furnace or ductwork to determine the repair needed.

2. Rattling

Loud rattling when your furnace turns on is usually caused by a cracked heat exchanger, which often leads to carbon monoxide leaks. If you hear rattling before the blower turns on, a damaged heat exchanger is almost certain.

If you hear consistent rattling while the furnace is in operation, loose ductwork could be the culprit. Try tightening all nuts, bolts, and connections on your ductwork to eliminate a simple cause. If you still hear rattling sounds, have your furnace inspected immediately.

3. Clicking

If you hear a clicking noise when your furnace turns on, the ignition is starting, and the sound is normal. If you hear repeated clicks, especially after the blower turns on, the flame sensor could be damaged or dirty. If you hear clicking, but the blowers don’t turn on, there could be a wiring issue or damaged gas valve. A furnace repair technician can clean the flame sensor, check for loose wiring, and replace a leaky gas valve as needed.

Homeowners across Summit, OH, rely on the expertise of the HVAC contractors at Lakes Heating & Air Conditioning for furnace repair. For approximately 45 years, their technicians have diagnosed problem noises to complete necessary repairs on new and aging equipment. Call the family-owned heating and cooling business at (330) 644-7811 to schedule an appointment or visit their website to learn more about their services.