How to Troubleshoot Common Furnace Problems

How to Troubleshoot Common Furnace Problems

When you start using your heating system this season, your comfort may be in jeopardy if problems crop up and you’re not prepared. Learning how to troubleshoot common furnace issues can help you solve some simple problems on your own or let you know when it’s time call an HVAC professional.

Common Furnace Problems You Might Encounter

  • No heat. First, make sure there are fresh batteries in the thermostat and that it’s in “heat” mode, and adjust the temperature setting so it signals the furnace to cycle on. If the furnace doesn’t start, look for a blown fuse or tripped circuit breaker in your main electrical panel. Next, check that the gas valve is open and the pilot light is lit (if you have an older model). If these fixes don’t work, you’ll need expert help to identify the culprit, which may be a failing thermostat or faulty electronic ignition.
  • Diminished output. You’ll notice a drop in the amount of warm air coming from the registers if the furnace filter is clogged, so replace it if needed. If this doesn’t help, an HVAC pro can check for other possible causes, such as a dirty gas burner or obstructed airflow to the combustion chamber.
  • Frequent on-off cycling. A furnace that starts up but shuts off too quickly wastes energy and makes it difficult to keep your home comfortable. A dirty filter can sometimes cause this, so check it first. If that’s not the issue, have your HVAC technician check the thermostat heat anticipator and investigate whether the blower belt needs adjusting or the motor needs lubrication.
  • Noisy operation. If the blower unit has started making a squealing noise and your furnace has oil ports, try adding a few drops of lightweight machine oil to lubricate the bearings. Another possible cause is a worn or misaligned fan belt that needs attention. If the furnace is making a rumbling sound, your technician may need to adjust the pilot light or clean the burner.

If you need help solving furnace problems in your Monmouth County home, contact the experts at Aggressive Mechanical Contractors today.

Our goal is to help educate our customers in Monmouth County, New Jersey and surrounding areas about energy and home comfort issues (specific to HVAC systems). 

Credit/Copyright Attribution: “docstockmedia/Shutterstock”

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