4 Signs Your Furnace Needs Maintenance

By jairadmin
In December 13, 2018

To prevent expensive repairs (and maintain your priceless comfort) pay attention to these 4 common signs your furnace requires maintenance.


Loud sounds are a solid indicator your furnace has airflow reductions, a clogged burner or a mechanical problem. Scraping indicates a worn-out ball bearing. A high-pitched squeal, on the other hand, means you could have a frayed or slipped blower belt. If this is the case, you should turn your furnace off and call an expert as soon as possible.

Bad Pilot Light

Another common sign that your furnace requires maintenance or repair is a malfunctioning pilot light. If your pilot light is flickering or yellow, you may have excess carbon monoxide coming from your furnace.


If you feel like your furnace is turning “on” and “off” frequently, and your home is without consistent heat, it is an indicator that you have a bad thermostat setting, improper airflow and/or a clogged filter. If your furnace blowing cold air, it is a sign that your furnace is at serious risk of a breakdown.


A cracked heat exchanger is a common symptom of lack of maintenance, especially for older furnaces. It is expensive to repair, and replacing your entire heating system becomes a reality. Dirty filters and natural wear and tear are other reasons to keep up with scheduling regular maintenance for your furnace. It will expand the lifespan of your heating system and improve indoor air quality.


If you find yourself thinking your furnace shows any of these signs, contact the heating experts at Johnson Air.  We value our customers and are a local, family-owned and operated company here in San Diego. Licensed, certified, and insured – we offer a 100% money-back guarantee.

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