Furnace Not Heating
About This Problem
Your furnace is not producing heat or is blowing cold air. This can be uncomfortable and even dangerous during cold weather.
Common Symptoms
- No warm air coming from vents
- Furnace turns on but blows cold air
- Furnace short cycles (turns on and off quickly)
- Unusual noises from furnace
- Yellow pilot light instead of blue
Possible Causes
- Thermostat set incorrectly or malfunctioning
- Dirty or clogged air filter
- Pilot light out (gas furnaces)
- Ignition problems
- Gas supply issues
- Blower motor problems
- Faulty flame sensor
What You Can Try
- Check thermostat settings and batteries
- Replace dirty air filter
- Relight pilot light if out
- Check circuit breaker
- Have gas supply and connections inspected
- Professional cleaning of flame sensor
Prevention Tips
- Schedule annual furnace maintenance
- Replace filters regularly
- Install a carbon monoxide detector
- Keep area around furnace clear
Frequently Asked Questions
What causes furnace not heating?
Thermostat set incorrectly or malfunctioning. Dirty or clogged air filter. Pilot light out (gas furnaces).
Can I fix furnace not heating myself?
Some simple issues like check thermostat settings and batteries can be DIY. However, if the problem persists or involves electrical/gas components, professional repair is recommended for safety.
How quickly can you repair furnace not heating?
We offer same-day service for most furnace repairs in the East Bay. Our technicians arrive prepared with common parts to complete repairs quickly.
Need Professional Help?
Our certified technicians can diagnose and fix furnace not heating quickly. Same-day service available.
Book Repair ServiceOr Call (650) 603-5182Related Problems
What Customers Say About Our Furnace Repair
Read reviews from customers who had furnace not heating issues fixed
“Our furnace stopped working on a Sunday. They came out same day and fixed it. The price was exactly what they quoted. No surprises!”
“Finally, an honest HVAC company. They diagnosed the problem, gave me options, and didn't push expensive repairs I didn't need. Fair pricing and great work.”
“appliance repair done right. The tech knew exactly what he was doing. Worth every penny for the peace of mind. Will use again.”