My Furnace Won’t Turn on

The more the temperatures drop, the more you rely on your furnace to keep you warm and comfortable. When you furnace malfunctions, you must get it fixed quickly. Troubleshooting your furnace issues may help you fix it or make it easier for your HVAC contractor to fix it. 

Is the Power On?

Make sure you have the furnace’s power switch flipped to “on.” It should be inside or next to the furnace cabinet.

Check the Circuit Breakers

Checking the circuit breakers should be one of the first things to check. Make sure they are all flipped to the “on” position. Even if you have a gas furnace, parts of your system still requires electricity. If the circuit trips again, you may have a short in the electrical system and if that’s the case, you’ll want to contact a technician.

My Furnace Won’t Turn Off

Furnaces work with your thermostat. When the temperature in your home drops to a certain degree, your furnace will kick on and stay on until the temperature reaches your desired temperature. But what if your furnace never turns off? Below are some common reasons why your home furnace may not be turning off.

Check Your Thermostat Settings

This should be the first thing you check. It may sound easy, but a thermostat setting is often the issue. Make sure your thermostat is set to “auto” and not “on”. This will make sure your furnace is only blowing air when heat is produced. Also, check the temperature setting, and make sure it is set to heat and not cool.

Check Your Air Filter

Your furnace pulls air from your home and into the system. However, before it reaches the system, the air passes through an air filter where debris is filtered out. If you have a dirty air filter, it will restrict air from passing through the system, which may cause your furnace to run longer. Change your air filter, if you’re furnace is still running after an hour or so, contact Vanport. Our HVAC technicians will inspect your system and figure out what is really going on.

Check the Fan Relay Switch

This small component tells your furnace when to turn on and off. Turn your thermostat off. If your furnace blower doesn’t turn off, there may be a malfunction with the fan relay switch or the thermostat. An inspection by an HVAC technician will be able to repair whichever component is the issue.

Check for Leaky Ductwork

Over time the ductwork in your home may become loose or seals may open up. Your home will have two types of ductwork: return and supply. Return ducts suck air into your furnace so it can be heated while supply ducts blow the heated air throughout your home. If you have leaky supply ducts, the hot air could leak into your attic or crawl space, causing your furnace to work harder to heat your home. If you’re not sure how to safely inspect your ductwork or you need your ducts repaired contact Vanport. We’ll inspect your system and make any necessary repairs to get your heat distributed as it should once again.

Experts in Furnace Repairs

If you’ve tried problem-solving your furnace issues on your own and your furnace still won’t turn off, contact Vanport Mechanical. Our HVAC technicians are highly skilled residential HVAC systems. For quick and reliable HVAC services in the Vancouver WA area, contact Vanport.