The short answer
PerfectFix HVAC Services repairs gas furnaces, heat pumps, and related controls and ductwork for Monte Sereno homes. We find the actual cause, explain your options in plain terms, and get the repair approved by you before any work starts. Bay Area Air District rules do not force you to replace a working furnace.
Monte Sereno winters are mild by most measures, but cool, damp nights still make a working heater important, especially in hillside homes that lose warmth quickly after sundown. When your furnace won't light, your heat pump blows cool air, or one room never warms up, you need a clear diagnosis and a repair that holds. PerfectFix HVAC Services sends technicians from our base in San Jose, about 9 miles northeast, to repair gas furnaces, heat pumps, and the thermostats, ducts, and controls that work with them.
Heating Problems We Fix in Monte Sereno Homes
Many Monte Sereno heating systems sit idle through the long, dry summer and then get switched on all at once when the first cold, wet stretch arrives. That pattern turns up problems that built up quietly over the off-season: dust on burners and sensors, weak igniters, and filters that were never changed. Larger homes with long duct runs or multiple zones also tend to show uneven heating that gets worse as parts wear.
These are the calls we handle most often:
- Furnace that clicks, tries to light, and shuts off
- Heat pump running but blowing lukewarm or cool air
- Rooms or upstairs floors that stay cold while others overheat
- Burning, musty, or electrical smells when the heat comes on
- Short cycling, where the system turns on and off every few minutes
- Thermostat that doesn't respond or loses its settings
- Loud banging, squealing, or rattling from the furnace or air handler
What Happens During a Repair Visit
We start by asking what you've noticed and when it started. Details like a smell on startup or a cold room that used to be fine help narrow things down. The technician then checks the system from the thermostat to the equipment: power and gas supply, ignition and flame sensing, safety switches, blower operation, airflow, and, on heat pumps, the outdoor unit and defrost function.
Once we find the cause, we explain it in plain language, show you what we found when possible, and lay out your options before doing any work. If a part has to be ordered, we tell you so and make the system safe in the meantime. If we see a safety concern, such as signs of a cracked heat exchanger or a venting problem, we'll say so directly and explain what it means for using the furnace.
Repair or Replace? Local Rules Worth Knowing
Most heating problems are repairable, and repair is usually where we start. Bay Area Air District appliance rules do not require you to replace equipment that still works. They apply only when an existing furnace fails or is replaced.
Planning ahead still makes sense for older furnaces. Under Air District 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 nearing the end of its life, it helps to know this before a breakdown forces a quick decision.
If you're weighing a heat pump, note that the federal Energy Efficient Home Improvement Credit (25C) ended for systems placed in service after December 31, 2025. Bay Area homeowners can still check BayREN and their local clean energy provider for heat pump and electrification incentives. Amounts and availability change by funding cycle, so we confirm the current offer before including it in any quote.
Simple Checks Before You Call
A few quick checks can sometimes restore heat or help us diagnose faster. If none of these solve the problem, turn the system off and call us rather than resetting it repeatedly.
- Confirm the thermostat is set to Heat and the batteries aren't dead
- Check the breaker and the furnace's power switch, which often looks like a light switch near the unit
- Replace a clogged air filter
- Make sure supply and return vents aren't blocked by furniture or rugs
- Clear leaves and debris from around an outdoor heat pump unit
Serving Monte Sereno and Nearby Communities
Monte Sereno is in Santa Clara County, a short drive from our San Jose base. We also provide heating repair in Los Gatos, Saratoga, Campbell, Cupertino, and Santa Clara, so we work in neighborhoods like yours throughout the heating season. When you call, tell us what the system is doing and we'll schedule a visit that fits your day.
More services in Monte Sereno
- AC Repair in Monte Sereno
- Heat Pump Installation in Monte Sereno
- AC Installation in Monte Sereno
- Furnace Repair in Monte Sereno