Heater & Furnace Repair in Northgate, Walnut Creek, CA
Heater and furnace repair for Northgate homes
Cold winter mornings in Northgate 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 21 miles southwest
- ZIP code
- 94598
- Power
- PG&E delivery, MCE generation
- Permits
- City of Walnut Creek Building Division
Serving Northgate
We serve every part of Northgate, including Northgate High School, Foothill Middle School, Walnut Acres Elementary and Shell Ridge Open Space - it's about 21 miles southwest via Kirker Pass Road and Ygnacio Valley Road from our Antioch shop. Most Northgate homes are 50-plus years old, and with freezing nights common in winter, an older furnace near Walnut Acres Elementary or Shell Ridge Open Space deserves a fall checkup. On every furnace repair in Northgate, we check the burners, flame sensor, venting and heat exchanger before we call the job done.
Main roads
- Ygnacio Valley Rd
- North Gate Rd
- Oak Grove Rd
Around Northgate
- Northgate High School
- Foothill Middle School
- Walnut Acres Elementary
- Shell Ridge Open Space nearby
Other services in Northgate
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 Northgate?
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.
