The short answer
PrimeAir HVAC Repair Service diagnoses and repairs gas furnaces, heat pumps and thermostats in San Leandro homes, with 24/7 emergency service. Bay Area Air District rules do not require you to replace a working furnace, so repairing your current system is still an option when the fix is sound and safe.
When your furnace or heat pump stops keeping up on a cold, damp night in San Leandro, you want a clear answer about what's wrong and what it will take to fix it. PrimeAir HVAC Repair Service handles heating repair for homes across San Leandro's 94577, 94578 and 94579 ZIP codes, about 11 miles northwest of our base in Fremont. We work on gas furnaces, heat pumps, and the ductwork, thermostats and controls that connect them. On every visit, we find the actual cause, explain it in plain terms, and lay out your options before any work starts.
Heating problems we fix in San Leandro homes
Many San Leandro homes run their heat only part of the year. Problems often show up the first time the system comes on in fall, or after weeks of light use. Dust on the burners, a weak igniter, or a thermostat with dying batteries can go unnoticed until the first chilly evening. These are the problems we see most often:
If you smell gas, leave the house and call your gas utility or 911 from outside before you call us. Once the utility says it's safe, we can diagnose and repair the equipment.
- Furnace won't ignite, or lights and then shuts off after a few minutes
- Blower runs, but the air coming from the vents is cool
- Short cycling, where the system turns on and off over and over
- Heat pump iced over, stuck in defrost, or blowing lukewarm air in heating mode
- Burning, musty or electrical smells when the heat comes on
- Rattling, squealing or banging from the furnace cabinet or ducts
- Uneven heat, with some rooms warm and others cold
- Thermostat that doesn't respond or doesn't match the room temperature
How a heating repair visit works
We start by asking what you've noticed. When did the problem start? Have you heard any sounds or smelled any odors? Did anything change recently, such as a new thermostat or a filter swap? Those details often point straight to the cause.
Next, the technician checks the system from end to end. That includes the thermostat signal, power and gas supply, ignition sequence, flame sensor, safety switches, blower motor and capacitor, filter and airflow, and venting. On heat pumps, we also check refrigerant pressures, the reversing valve and the defrost controls. On older furnaces, we inspect the heat exchanger for cracks, because a damaged heat exchanger is a safety problem as well as a comfort problem.
You'll get a plain explanation of what failed and what we recommend. If a repair makes sense, we'll say so. If the equipment is near the end of its life, we'll tell you that too and explain both paths so you can decide.
Repair or replace? What Bay Area rules mean for your furnace
Some San Leandro homeowners have heard that the Bay Area Air District is phasing out gas furnaces and worry they'll be forced to replace a working unit. The rules don't work that way. The Air District's appliance rules don't require anyone to replace working equipment. They apply only when an existing furnace fails or is replaced.
Here's what is changing. Under Rule 9-4, natural gas furnaces manufactured from 2029 on must meet a zero-NOx emission standard. In practice, that points homeowners toward heat pumps when they replace a furnace after that date. Repairing the furnace you have now is still a reasonable choice when the fix is sound and the system is safe.
If you're weighing a replacement, note that the federal 25C tax credit covered qualifying heat pumps placed in service before December 31, 2025. It isn't available for new installations after that date. Local programs may still help. BayREN and your local clean energy provider offer heat pump and electrification incentives, but amounts and availability change by funding cycle, so we confirm the current offer before we include it in any quote.
Keeping your heat reliable between repairs
A few simple habits prevent many no-heat calls:
A tune-up before winter lets us clean the burners and flame sensor, test the safety controls, and catch worn parts before they fail on a cold night.
- Check your furnace filter regularly during heating season and replace it when it looks dirty
- Keep supply and return vents clear of furniture, rugs and curtains
- Keep the area around the furnace free of stored items, especially anything flammable
- Clear leaves, debris and plants away from the outdoor heat pump unit
- Replace thermostat batteries once a year
- Run the heat briefly in early fall to catch problems before the first cold night
Serving San Leandro and nearby cities
San Leandro is in Alameda County, a short drive from our Fremont base. We also provide heating repair in Hayward and Union City, and across the Bay in Foster City, Redwood City and San Carlos. We offer 24/7 emergency service, so you can reach us if your heat goes out late at night or on a weekend.
More services in San Leandro
- AC Repair in San Leandro
- Heat Pump Installation in San Leandro
- AC Installation in San Leandro
- Furnace Repair in San Leandro
