The short answer
ChillPro AC Repair diagnoses and repairs gas furnaces in Los Altos Hills, with technicians coming from San Jose about 11 miles away. Most no-heat calls come down to ignition, airflow, sensor or control problems that can be repaired. Bay Area Air District rules do not force you to replace a working furnace.
When a furnace quits in Los Altos Hills, it usually happens on a damp winter evening when the house is cooling down fast. ChillPro AC Repair sends technicians from our base in San Jose, about 11 miles east, to diagnose and repair gas furnaces in homes throughout the 94022 ZIP code. Our goal on every visit is simple: find the actual cause, explain it in plain terms, and fix what is broken without recommending work you don't need.
Common Furnace Problems in Los Altos Hills Homes
The Santa Clara Valley has mild, damp winters, so many furnaces here run only part of the year. That light use is easy on some parts, but it also means problems tend to show up all at once on the first cold night of the season, after the system has been sitting idle for months.
These are the issues we diagnose most often:
- Furnace runs, but only blows cool air, often from a failed igniter or a dirty flame sensor
- Burners light briefly and then shut off
- Blower runs constantly or won't come on at all
- Short cycling, where the furnace turns on and off every few minutes
- Rattling, squealing or booming noises at startup
- A burning-dust smell that doesn't fade after the first few heating cycles
- Thermostat calls for heat but nothing happens
- Some rooms stay cold, which is common in larger homes or homes with long duct runs
What to Expect From a Repair Visit
Before you call, check the basics: make sure the thermostat is set to heat and has working batteries, confirm the furnace power switch is on, check the breaker, and look at the air filter. A badly clogged filter can cause a furnace to overheat and shut itself down.
If those don't solve it, our technician will test the ignition sequence, flame sensor, safety switches, blower motor, control board and venting. We look for the cause, not just the symptom. A flame sensor that keeps getting dirty, for example, can point to an airflow or combustion issue that needs attention too.
Once we know what's wrong, we explain the problem, walk you through your options, and give you a clear quote before any repair work starts. If we notice anything that affects safe operation, such as a cracked heat exchanger or a venting problem, we'll show you what we found and explain why it matters.
Repair or Replace? What Bay Area Rules Mean for You
Homeowners often ask whether new air quality rules mean they have to replace their furnace. They don't. The Bay Area Air District's appliance rules do not require anyone to replace working equipment. They only apply when an existing furnace fails or is replaced.
What the rules do change is the long-term outlook. 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 a furnace is replaced after that date. If your furnace is aging and needs a major repair, it's worth weighing that cost against planning for a heat pump.
On incentives: the federal 25C tax credit for heat pumps applied only to systems placed in service before December 31, 2025, so it isn't available for new installations. Bay Area homeowners can still check BayREN and their local clean energy provider for current heat pump and electrification incentives. Because amounts and availability change by funding cycle, we confirm the current offer before including it in any quote.
Getting a Seldom-Used Furnace Ready for Winter
Because heating season here is short, a little attention in the fall goes a long way. Replace the filter, clear stored items away from the furnace and return vents, and run the heat for a few minutes before the first cold snap so you can catch a problem while you still have time to schedule a repair.
A tune-up before winter lets a technician clean the burners and flame sensor, check the igniter, test safety controls and inspect the venting. It's also a good time to talk through whether your current furnace is likely to last several more seasons.
Serving Los Altos Hills and Nearby Communities
We provide furnace repair across Los Altos Hills and the surrounding parts of Santa Clara County, including Los Altos, Mountain View, Cupertino, Sunnyvale and Saratoga. If your heat is out or your furnace is acting up, contact ChillPro AC Repair to schedule a diagnostic visit.
More services in Los Altos Hills
- AC Repair in Los Altos Hills
- Heating Repair in Los Altos Hills
- Heat Pump Installation in Los Altos Hills
- AC Installation in Los Altos Hills
