Your furnace is one of the most complex appliances in your home. So when it stops working there is no time to lose. Perhaps it’s time for a Furnace Tune up? Here is a troubleshooting checklist that’ll help you narrow down the problem.

1. Is your thermostat set to “Heat”?

Is your thermostat set to “heat”? If yes, check that your temperature setting is high enough to activate the furnace.

2. Are your thermostat batteries low?

If your thermostat is battery operated, the cells may be dead. If you see a “low battery” warning, put in fresh batteries.

3. Is your furnace switch working?

If your thermostat is working, see if your furnace power switch is off.

4. Do you have a tripped breaker?

If the switch is on, but your furnace is still not working, check to see if you have a tripped breaker. Your breaker box is (hopefully) labeled “Furnace” or “HVAC” next to the correct breaker. If not, look for a tripped breaker and reset it, if you can.

5. Is your front panel door secure?

Modern furnaces come with safety switches on their front panels that don’t allow the furnace to engage if it’s not properly closed. Check to see if your panel door is secure.

6. Is your pilot light on?

If you have a gas furnace, the pilot light must be on for it to work. Pilot ignition is a safety feature that ensures gas doesn’t flow through the burners until there’s a flame ready to ignite them. Lighting a pilot light can be dangerous. It’s best to get professional help from a licensed technician before modifying anything in your furnace.

7. Are your filters clogged?

Dirty and clogged furnace filters are a common problem. Air filters trap dust, hair, and other particles. If not changed regularly, they can restrict air flowing through your furnace system.

8. Are your vents and registers closed or blocked?

If your furnace is running but the house is still cold, your outflow vents and registers may be closed or blocked. Check to see if your vents are open and that no rugs or furniture are obstructing them.

9. Is something blocking your fresh air intake?

Not all furnaces vent through chimneys. Many newer furnaces have their fresh air intakes and exhaust runs through the side of the home and deep snow, windblown leaves, insects, and moisture can create exhaust problems. If this is the case, consult a licensed technician about possible venting solutions.

10. Have you called an expert?

The best way to keep your furnace running is to have your heating system inspected by an expert. Annual Furnace Maintenance by a licensed technician can save you time, frustration, and money.

If you’ve tried everything and your furnace still isn’t working, call Garry’s Heating Services to speak with a licensed technician about a Furnace Tune Up. We can do a deeper dive into specific issues with your furnace model — before you need to make a furnace repair call for no heat this winter.

☎️ Looking for furnace service, maintenance or installation? Have questions? Give us a call @ 780.459.4919.