Residential Plumbing & HVAC Experts

5 Normal HVAC Problems

Few things are more frustrating than having your HVAC system break down. How serious is the issue? Can you fix it yourself, or do you need to call someone? How much will the repairs cost? Are you having "normal" HVAC problems, or is it something more serious? Here are some of the most common issues, to help quell your anxiety.

Power issues.

One of the most common HVAC problems is that power simply isn't running to the unit. Is the unit turned on and plugged in? Do the thermostat's batteries need replacing? Does the circuit breaker need to be reset? These are all quick, easy fixes that can get you back up and running in no time. Have a checklist of possible power issues to look at before calling for repairs.

Clogged filter.

If air isn't flowing through your home as well as it should, or if it's taking too long to heat or cool it properly, check the air filter. If it's grey and opaque, it needs to be replaced. Checking and replacing your filter regularly can save energy and help your system function more efficiently.

Leaking water.

A little bit of water around your system is perfectly normal. The conditioning process causes a certain amount of condensation. However, if there's a huge puddle leaking out from the unit, you should probably call your HVAC technician.

Furnace smells.

The first time you start up your furnace at the beginning of the season, there may be a bit of a burning smell. It's perfectly natural, and should subside quickly as the dust that's accumulated throughout the year burns off. If it doesn't subside, or if you notice any other HVAC smells, call an expert to take a look.


Modern HVAC systems make very little noise, so especially if you've just upgraded, you may worry it's "too quiet." However, it's actually the presence of loud banging, rattling, or clanging sounds that may indicate a problem.

To learn more about normal HVAC problems, contact us at Sherlock Heating & Air Conditioning today. We've served the San Diego area's HVAC needs since 2002.

Our goal is to help educate our customers in the greater San Diego and San Marcos, California area about energy and home comfort issues (specific to HVAC systems).