What Should I Do If My Heater Is Not Working in My House?

If your heater stops working, try these quick checks, then book service if it still won’t run.

• Set thermostat to Heat at 68°F; replace batteries.
• Verify furnace switch and breaker are on.
• Replace a dirty air filter.
• Open vents and clear the return.
• Check pilot light; red/yellow/orange means a fault.
• Note error codes or strange sounds. We repair, replace, and maintain heaters in Novato, Petaluma, and San Rafael. Free estimates for new systems. Lucky’s Comfort Club adds priority service and 10% off.

Updated: 2025-12-30 00:00:00

Need help in Rohnert Park, CA? Call (415) 862-8961 or book online.

"Roberto quickly diagnosed and repaired a heating/cooling duct issue." — Jeff K.