Wondering Why Your Furnace Won’t Come On?

furnace won't come on

It’s that time of year in the Bay Area when one day you may need to turn the furnace on, the next day maybe not. When the weather gets downright chilly, the last thing you want is a malfunctioning furnace. What to do when your furnace won’t come on or doesn’t seem to be working as it should? Our San Mateo HVAC experts have a few troubleshooting tips.

First of all, make sure your system is getting power. Check the fuse box for tripped circuit breakers, make sure the power switch is in the “on” position, and check to see if the fuse needs to be replaced if the first two options fail to solve the problem. A blown fuse will be blackened and burned, however you may want to contact our heating pros as it could indicate a more serious issue.

Is the thermostat set to “heat” mode? If it is, you may want to check that the temperature your system is set on is sufficient to make the furnace kick on. Be sure to have your user’s manual easily accessible if you have a programmable furnace, as this type of thermostat can be a bit more complicated.

Make sure the batteries in your thermostat don’t need replacing.

Inspect the exhaust or fresh air intake to make sure there aren’t any obstructions such as boxes, or damage to wiring that could be caused by pets or even insects or rodents. In most cases you’ll find these components located in a closet, garage, or attic.

If the heat comes on but it doesn’t feel as though your home is heating up as it normally would, take a look at the air filters. A filter that’s clogged by dust, pet dander, hair, and other debris prevents proper airflow, which will impact your furnace’s heating capacity.

Before you find out your furnace isn’t operating properly or won’t come on at all, it’s a good idea to have your system inspected. Taking preventative measures will mean a warm, comfortable home when temperatures plummet! At Ortiz Heating & Air Conditioning, we’re the experts in home comfort for homeowners in San Mateo and throughout the Bay Area.