When your furnace stops working, you just want to get it fixed. No one wants to be stuck in a cold house when they could be warm and cozy instead. So, when it stops working, there are some things that you can do to try and get it working again before you call an HVAC service. If you do these troubleshooting things, it can also make it easier when the HVAC service comes out because they aren't going to have to do those things. They can move on to other areas where your HVAC may be in need of repair. So, what are some of the things that you can do?
Check the Emergency Switch
Most furnaces have an emergency switch that can be used to turn the furnace off in case something happens. It may be an actual switch or it could be a button. The switch is usually located somewhere near the furnace, and usually up near the ceiling. Putting it up high will make it easier for no one to bump into during the normal course of the day. What you want to do is to check to see if the switch is in the "on" position. If you aren't sure if it is or not, then you can move the switch to the opposite position and see if that turns on your furnace. If it doesn't, then put the switch back into the original position and see if that helps you. If your furnace does come on after you deal with the switch, you still may want to have an HVAC service come out and check your furnace at some point.
Bleed the Furnace
If you have a furnace that runs on some kind of fuel oil like kerosene or propane, you may get air bubbles in the line that will cause your furnace to hiccup and stop working. Every furnace that runs on fuel oil has a bleed valve. You can follow the directions on the bleed valve and help to get those bubbles out and then turn your furnace back on. Before you turn your furnace back on, make sure that you don't have any fuel oil spilled around the furnace, just for extra safety.
If you are worried about your furnace not working, you can call an HVAC service and ask them to send someone as soon as possible so that you can get warm again. Contact a furnace repair service for additional information.