No heat
Thermostat, power, gas supply, ignition and control-board testing to find why the furnace will not fire.
Furnace not lighting, blowing cold or short-cycling? HAXX repairs gas and electric furnaces across Concord, from attic units to hall closets.
Serving Colony Park, Clayton Valley Highlands, Holbrook, Turtle Creek, Ellis Lake and Todos Santos and the rest of Concord. Share your address to confirm availability.

Gas furnaces in attics, closets, garages and crawl spaces. Every repair visit includes basic safety checks on the burners and venting.
Thermostat, power, gas supply, ignition and control-board testing to find why the furnace will not fire.
Furnaces that click, light and shut off are often a dirty flame sensor or a failing hot-surface igniter.
Limit switches, pressure switches and inducer motors checked in order.
Overheating from restricted airflow, a dirty filter or an oversized furnace.
Banging, squealing or a burning smell checked before the next cold night.
Venting, heat-exchanger visual check and carbon monoxide concerns raised in plain language.
Concord winters are mild but cool and wet, and most older homes still heat with a gas furnace. Ignitors, flame sensors and inducer motors fail most often.
Cracked hot-surface ignitors and dirty flame sensors cause most no-heat calls. HAXX tests both before replacing anything.
Every repair includes a check of venting and the heat exchanger area for signs of damage.
The Air District's zero-NOx furnace rule, starting in 2029, governs new units sold, so repairing your current furnace is unaffected.
Rated 4.8 across 515+ reviews on Housecall Pro, Google and Facebook. Read more reviews.
“Their technician was professional, honest, and took the time to explain the problem and the repair process clearly. Instead of pushing for an expensive replacement, they repaired our HVAC system and helped us save a significant amount of money. The work was completed carefully, and our air conditioner is now working well.”
“Thorough diagnostics of A/C system, identified and repaired the issue quickly!”
“Service was performed well and on time. Service person was highly skilled and provided easy to understand options to deal with the issue. Price for diagnostics was reasonable and easy to pay online.”
Brand, model and what it is doing. Photos of the label or error code help.
The technician tests the system and finds the cause, not just the symptom.
You see the repair price before work starts, and the options if a repair is not worth it.
The repair is completed and tested, or scheduled once the part arrives.
A closer look at recent heating and cooling work by HAXX.

On site during a commercial VAV box repair: access above a suspended ceiling, equipment and the work in progress.
Explore recent projects
System recharge and brazing correction.

Carrier furnace diagnosis and repair.

Attic plenum resealing.

Gas furnace service.

Heat pump installation.

Outdoor heat pump installation.

Heat pump air handler installation.

Heat pump air handler service.
Yes. The Air District rule covers sales of new gas furnaces starting in 2029. The furnace already in your home can still be serviced and fixed.
Often a dirty flame sensor, a clogged filter or an overheating limit switch. HAXX finds the cause on site.
If the furnace is old or the repair is expensive, it is worth pricing a heat pump, which also adds cooling. HAXX can quote both.
No. Turn it off, leave the house if the smell is strong, and call PG&E or 911. Call HAXX for the repair once the area is safe.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.
