What’s Causing My Furnace to Malfunction?

Family looking out at the cold

We’re writing this post towards the end of January, on a day where the temperatures never got above 20 degrees.

The wind chill made us feel colder…and very grateful for our furnaces.

It’s also the type of day where the last thing you want to deal with is a heater repair issue. Here are a few of the most common heating service problems you might have to deal with this winter.

Clunk1. A noisy furnace

If your furnace is rumbling and rattling, it could be a sign of a few different heating unit issues, including a clogged burner, airflow reductions or other mechanical problems.

2. Clogged – or dirty – filters

Dirty and Clean Furnace Filter

If the filter in your heating unit becomes dirty or clogged, it will stifle the flow of air, causing your HVAC your unit will have put in even more effort to heat your home. This puts a strain on your unit, makes you and your family less comfortable, and adds to your energy bill.

One sign of a clogged filter: a system that cycles between on and off modes. However, frequent cycling might also be the result of something else restricting airflow, or an improper thermostat setting.

3. Malfunctioning thermostats

Your thermostat governs the amount of heat – or cool air during the warmer months – that circulates through your home. A malfunctioning thermostat can lead to your home not getting enough heat, or for your heating system to kick on intermittently.

Fan_Blower4. Blower won’t stop running

If your blower runs non-stop, you could be dealing with a broken limit switch. This is something a heater repair professional will have to diagnosis and replace.

5. Wear and tear

There are several mechanical parts that are critical to your furnace performing at its best. When any of these parts begin to break down, it can trigger problems for your heating system, whether it’s furnace overheating or poor heating control.

6. Pilot control problems

Furnace Flame Close up

Most modern heating units typically use one of two ignition systems:

  • A hot surface ignition system, which uses a resistance heating element (think of the filament in a light bulb) to light the gas burner.
  • An intermittent pilot system, which uses a high-voltage speak to ignite the gas pilot, and then the main burners.

Problems with either of these systems could cause your home to receive intermittent heat, or worse, no heat at all.

7. Neglected maintenance

heater repairNearly everything on this list can be prevented – or at least spotted – by regular HVAC maintenance. If you don’t have your local heater repair service check your system regularly, you’re opening the door to minor issues that could mutate into major HVAC disasters.

Routine heating service and maintenance is the key to ensuring your HVAC system operates can live out its life at the height of safety and efficiency.

If you haven’t had your furnace checked in a while, contact All Seasons Comfort Control. Our heater repair experts will be happy to work with you to ensure your HVAC system is performing at its best, keeping you warm no matter how cold it gets.