What is The Most Common Problem with Furnaces?

As a homeowner, there are numerous things you can look for to diagnose different problems associated with a malfunctioned furnace. Analyzing these problems will help to prevent you from requiring a more costly repair or replacement.

Below, let’s examine some common issues that can cause your furnace to stop working:

Common Problems with The Furnace

  • Improper Working of The Pilot Light

If you have an older furnace with a pilot light that won’t stay lit, you’ll need the assistance of our certified professionals for heating repair in Encinitas or Vista, CA, to identify potential problems. Possible causes include:

  1. A malfunctioning thermocouple.
  2. A too-low flame setting.
  3. A faulty safety switch.
  • Strange Noises

Does your furnace emit sounds such as rattling, cracking, or pinging? There are numerous potential explanations for these noises. Typically, noises that sound like rattling result from loose furnace panels that need to be adjusted.

The reason for pinging or popping sounds is improper ducting. The duct will either expand or contract depending on whether the house is heated or cooled.

  • Contaminated Ductwork

Periodically, your heating ducts are susceptible to gathering dirt and other particles. This decreases the quantity of warm air entering your home.

If you’ve noticed that your furnace isn’t providing as much heat to your home as it once did, it’s possible that your home’s ductwork needs to be cleaned. You can assess whether or not the airflow is functioning correctly by placing your palm in front of the vents and feeling the volume of air coming out.

  • Short-Cycling

To maintain the temperature at the level you have set on the thermostat; your furnace may regularly turn on and off while heating your home. It is conceivable for a furnace to turn on, heat a room or the entire residence to the desired temperature, and then turn off multiple times within the same hour. The planned temperature and the outdoor temperature measurement determine this behavior.

When a furnace begins to “short cycle” or frequently turns on and off without ever reaching the desired temperature, this usually indicates that something is wrong. During a short cycle, the furnace will only be active for a few minutes before turning off again.

  • Blank Thermostat

There are multiple reasons why the display on your thermostat may be blank. You should first check the thermostat batteries. If they are dead, replace them to see if that resolves the issue. In most cases, the thermostat displays a low battery symbol.


As soon as you discover problems with your furnace, it’s recommended you have them resolved. Your home’s furnace typically consumes the most energy. Therefore, overall energy costs will skyrocket if it is not correctly functioning.

To prevent this, contact Precision Air INC offering services for heating repair in Vista and Encinitas. We provide the best services for your heating and cooling systems, including maintenance, and replacement. Contact us at 760-389-3353 or email us to schedule an appointment.

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