As the temperatures begin to drop, more and more people are turning their furnaces on. Unfortunately for some, the furnace won’t ignite. Troubleshooting the furnace doesn’t have to be difficult or complicated, though. Here are a few tips to help get you started.
- Make sure that the thermostat is on “heat.” This seems somewhat self explanatory, but it’s easy to set the temperature and forget to slide the indicator from off or cool to heat. This is also the time to ensure that the thermostat’s temperature is set to a warmer temperature than the current room temperature.
- Check the thermostat. Thermostats themselves may cause some problems. Older manual thermostats should be cleaned regularly, but there isn’t much else you can do to maintain these types of thermostats. Newer, digital thermostats can have malfunctions. You’ll need to consult the owner’s manual to troubleshoot the thermostat if the display is blinking or is blank.
- Turn the fan switch to “on.” By moving the switch from “auto” to “on,” you effectively send power to the furnace. If it’s getting power and the fan is working properly, the fan should come on when you do this. If it doesn’t, it’s time to call an HVAC professional to diagnose and repair the problem.
- Make sure the SSU switch is “on.” You can find the SSU switch on the wall near the furnace. It’s usually gray and resembles a light switch.
- Check the breaker or fuse. If you have a breaker box, make sure that the breaker’s on. If you have fuses, make sure that the fuse is good.
- See if the pilot light is lit. You should be able to see a blue flame when you open the combustion chamber door. If you don’t, it will have to be relit. Review your furnace’s owner’s manual for relighting a pilot light that has gone out.
If the furnace won’t ignite after performing these tasks, contact the pros at Air Treatment Inc. Our team of HVAC experts are proud to service Winston-Salem, Greensboro and surrounding areas.