01/29/2026
Furnace Not Heating? Try These First!
Before calling for service, here are a few common issues homeowners can safely check — and there are tons of YouTube tutorials that walk through these step-by-step if you’re a hands-on type.
Thermostat
Make sure it’s set to HEAT, not cool or fan only. Turn it up a few degrees above room temp. Replace batteries if applicable.
Furnace filter
A dirty filter is one of the most common causes of furnaces shutting down. If it’s clogged, replace it. Easy fix.
Power switch & breaker
Check the furnace power switch (looks like a light switch) and your breaker panel for a tripped breaker.
Flame sensor
If your furnace lights but shuts off after a few seconds, the flame sensor is often dirty.
👉 Search YouTube for: “clean furnace flame sensor”
There are dozens of simple tutorials showing how to remove it, gently clean it, and reinstall.
Inducer motor pressure port / hose
On colder days, the pressure switch port or rubber hose can plug with moisture or debris, causing the furnace not to stay running.
👉 Search YouTube for: “furnace pressure switch hose cleaning” or “inducer port blockage furnace”
Many homeowners are surprised how common (and fixable) this is.
Important safety note:
Always shut off power to the furnace before attempting any cleaning. If something doesn’t look right, stop and call a professional.
Call a pro if:
The furnace keeps short-cycling
You smell gas or burning odors (turn it off immediately)
DIY checks don’t solve the issue
If you’d rather not mess with it — We woul be happy to help. We’re all about honest fixes and keeping homes warm
