The short answer
We repair furnaces in Newark, CA that will not ignite, cycle on and off, blow cold air or make noise. Each visit includes a combustion safety check, and Air District rules never require replacing a furnace that still works.
Winters along Newark's stretch of the Bay are cool and damp more than cold, with gray mornings and the occasional rainy week. Furnaces here do not run constantly, but when one refuses to light on a 40-degree night, the house cools down fast. ReliableAir HVAC Services travels about 8 miles northwest from San Jose to repair gas and electric furnaces throughout Newark's 94560 ZIP code. On this page you will find how a typical Newark furnace call unfolds, the warning signs worth acting on, and practical answers about the Bay Area Air District rules that now come up whenever furnaces are discussed.
A typical Newark furnace call, from first ring to warm house
Most calls begin the same way: the thermostat is set to heat, the fan may or may not come on, and no warm air arrives. When you contact us, we ask a few questions about the furnace's age and location and whether you see a blinking light on the control board. That helps the technician arrive with likely parts.
On site, the technician follows the furnace's own startup sequence. First the thermostat call, then the draft inducer, pressure switch, igniter, gas valve and flame sensor, and finally the blower. Whichever step fails tells us where the problem lives. Once the cause is confirmed, we explain it and give you a written repair option before doing the work.
Warning signs that should not wait
Some furnace symptoms are simple annoyances. Others point to safety concerns. Turn the furnace off and call if you notice any of the following:
- A gas smell near the furnace or water heater; leave the home and call the gas utility first
- Yellow, flickering or lifting burner flames instead of steady blue
- Soot or scorch marks around the front panel or vent
- Carbon monoxide alarm sounding
- Loud bang when the burners light, suggesting delayed ignition
- Furnace running constantly without shutting off
Repairs we handle most often
Newark homes include many furnaces installed in garages and attics, plus a share of upflow units in hall closets. Garage units collect dust and lint that clog burners and filters; attic units see temperature swings that stress wiring and drain lines on condensing models. The fixes we perform most frequently include igniter replacement, flame sensor cleaning, inducer motor and pressure switch repair, blower motor and capacitor replacement, limit switch and control board diagnosis, and clearing blocked condensate lines on high-efficiency furnaces.
We also look at the venting. If a remodel or roof job disturbed the flue, the furnace may not draft properly, and that is both a performance and a safety issue.
Air District rules: what Newark homeowners should know
Newark is in Alameda County, which falls under the Bay Area Air District along with the rest of the region. Under its Rule 9-4, natural gas furnaces manufactured from 2029 must meet a zero-NOx emission standard. In practice, that means homeowners replacing a furnace after that date will likely be steered toward a heat pump.
The key point is that the rules do not require replacing working equipment. They apply only when an existing furnace fails or is replaced. Repairing your current furnace remains a valid choice, and for many households it is the right one. If your unit is old enough that a major failure is likely in the next few years, we can talk through what a planned switch would look like so you are not making a rushed decision in a cold snap.
Keep it running between visits
Replace or clean the filter every one to three months during the heating season. Keep the area around the furnace clear of boxes, paint cans and laundry. Make sure the outdoor intake and exhaust pipes on high-efficiency furnaces stay free of leaves and debris. An annual tune-up before winter catches worn igniters and dirty sensors before they leave you without heat.
Service area
Our furnace technicians work across Newark and in nearby Fremont, Milpitas, Sunnyvale, Mountain View and Palo Alto. Send a short note about what your furnace is doing, and we will arrange a visit.
More services in Newark
- AC Repair in Newark
- Heating Repair in Newark
- Heat Pump Installation in Newark
- AC Installation in Newark