Furnace blowing cold air?
Let’s check what may be causing it.
What does the air feel like?
FAQs
▶Why is my furnace blowing cold air?
Common causes include thermostat settings, a dirty filter, ignition problems, gas supply issues, overheating, blower delays, or a furnace safety shutoff.
▶Should I turn the furnace off?
Turn it off and call for service if you smell gas, smell burning, hear unusual noises, see repeated shutdowns, or the system will not produce heat.
▶Can a dirty filter cause cold air?
Yes. A clogged filter can restrict airflow and may cause overheating or safety shutdowns that interrupt heating.
▶What should I check first?
Check thermostat mode and set temperature, replace a dirty filter, make sure vents are open, and check whether the breaker is tripped.
▶When should I call for heating repair?
Call if the furnace continues blowing cold air after basic checks, cycles on and off, will not ignite, or shows warning signs.
Need help with a furnace blowing cold air?
If your furnace is running but not heating, All Weather can check airflow, thermostat settings, ignition issues, safety controls, and heating equipment performance.