Heater & Furnace Repair in San Marco, Pittsburg, CA
Heater and furnace repair for San Marco homes
Cold winter mornings in San Marco are when an old furnace shows its age. Blue Star Heating & Air repairs gas furnaces and heat pumps - igniters, flame sensors, blower motors, thermostats, limit switches and more - and tells you plainly whether the unit is still safe to run.

- From our Antioch shop
- About 14 miles west
- ZIP code
- 94565
- Power
- PG&E delivery, MCE generation
- Permits
- City of Pittsburg Community Development – Building Division
Serving San Marco
From our Antioch shop on Wilbur Avenue, San Marco is about 14 miles west via SR 4 and San Marco Blvd, and we cover the whole area, including Siena at San Marco, San Marco Villas, Vista Del Mar and San Marco Blvd. When winter nights turn cold in San Marco, we keep gas furnaces and heat pumps running, and we flag original equipment that is nearing the end of its life. On every furnace repair in San Marco, we check the burners, flame sensor, venting and heat exchanger before we call the job done.
Main roads
- San Marco Blvd
- W Leland Rd
- Willow Pass Rd
- SR 4
Around San Marco
- Siena at San Marco
- San Marco Villas
Other services in San Marco
All servicesQuestions before you call
Why is my furnace blowing cold air?
Common causes are a thermostat set to 'fan on', a dirty flame sensor, a failed igniter, a clogged filter tripping the high-limit switch, or a heat pump stuck in defrost. We test each one and fix the actual cause.
How much does furnace repair cost in San Marco?
Small fixes like a flame sensor or igniter cost far less than a blower motor or control board. We diagnose first and quote the repair before starting, and we'll tell you if replacement makes more sense.
What should I do if I smell gas near my furnace?
Leave the house, don't flip switches, and call PG&E (or your propane supplier) or 911 from outside. Once it's safe, call us to find and repair the cause.
