Why is my heater blowing cold air instead of warm?

Heaters blow cold air when the thermostat is on FAN/ON or COOL, the filter is clogged, the pilot or igniter fails, or a heat pump is defrosting. We service all brands in Novato and Vacaville. Annual maintenance can prevent up to 70% of heating repairs. A technician will confirm the cause on site.

• Set thermostat to HEAT; fan to AUTO.
• Replace or clean the air filter.
• Check breakers and gas supply.
• Note any error lights for the tech.

"Roberto quickly diagnosed and repaired a heating/cooling duct issue." — Jeff K.[1].