When the heat goes out in Novato, CA, the clock starts ticking, and the diagnosis depends entirely on what kind of system is doing the failing. On a gas furnace, the single most frequent culprit is a flame sensor coated in oxide: the burners light, the sensor cannot prove the flame, and the board shuts the gas down after the third attempt and locks out. Close behind come cracked hot surface igniters, stuck pressure switches, clogged condensate traps on high-efficiency models, and blower motors that have quietly worn out. Heat pumps fail differently: a weak defrost cycle leaves the outdoor coil buried under frost, a failed reversing valve strands the system in cooling, and a dead outdoor unit leaves the electric backup strips carrying the whole house at several times the operating cost.
Guessing gets expensive on a cold night, so Novato HVAC treats every heating call as a diagnosis first and a repair second. Our techs measure before they replace anything: microamp flame signal, igniter resistance, pressure switch response to actual inducer draft, capacitor and motor readings, plus charge and defrost checks when the system is a heat pump. On gas equipment, safety checks are part of the routine, not an add-on. Gas connections are leak-tested, the heat exchanger is inspected, and venting is verified, because warm air from an unsafe furnace is not a fix.
Furnace, heat pump, air handler, boiler, or ductless unit, from any major brand, we service it. Stocking igniters, flame sensors, capacitors, inducer motors, and blower motors on every truck means most homes are warm again the same visit. And if a repair no longer makes sense for aging equipment, we will be honest about that and lay out the options with real numbers. Call (415) 234-7418 for heating repair anywhere in Novato, and an experienced technician will head your way today.
Most of our service calls are for Furnace Repair in Novato. That's the place to start if you need a fix today.
Warning Signs for Heating Repair
Recognizing the warning signs early can save you time, money, and prevent significant damage to your property. Here are the most common indicators that it's time to call a professional:
- Short cycling every few minutes while the house stays cold
- Higher heating bills with less comfort to show for them
- The furnace clicking and trying to light but shutting back down
- A heat pump's outdoor unit encased in frost or ice
- Strange smells from the vents, especially rotten egg or burning
- Uneven heat, with certain rooms that never warm up
- Cold air, or no air at all, when the thermostat calls for heat
- Booming or banging at ignition, a sign of delayed burner light-off
Don't Wait for a Total Failure
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Call Novato HVAC at (415) 234-7418 at the first sign of trouble.
Your Heating Repair Questions Answered
Why Hire a Professional for Heating Repair?
The most serious heating failures are the ones nobody notices. A cracked heat exchanger can send combustion gases into the supply air, a blocked or failing flue can spill carbon monoxide into the house, and a furnace that lights late booms gas inside the exchanger, weakening it a little more every cycle. Without instruments, none of it is easy to spot. Even routine symptoms can mislead: a short-cycling furnace may have a bad limit switch, or it may simply be shutting down to protect itself from a choked filter. Clean a flame sensor without asking why it fouled, and the next lockout is already on the calendar.
That is why Novato HVAC does not guess. Our technicians read flame signal on a meter, look at the heat exchanger directly, confirm the flue is drafting, and compare temperature rise to the data plate to make sure the blower speed fits the burner. On heat pumps we check defrost controls, sensors, and the reversing valve before blaming the compressor, and we find out whether the electric backup heat has been running in the background and driving up your costs. Nothing is called fixed until it has run a full cycle and proven itself safe and correct, because that is what the machine heating your home deserves.
What to Expect From Our Heating Repair
Every visit follows a step-by-step method refined over years of hands-on experience. Here's how we handle heating repair from start to finish:
Diagnosis and Safety Check
Fault codes are only the starting point. We meter flame signal and igniter resistance, test the pressure switch, check motors and capacitors, verify charge and defrost on heat pumps, and leak-test the gas connections on every visit.
Straight Answers & a Firm Price
Before any repair begins, we walk you through what broke, why it broke, and what it will cost. And if the findings, like a cracked heat exchanger or a dead compressor, point toward replacement, we say so plainly.
Expert Repair
Because our trucks carry igniters, flame sensors, pressure switches, capacitors, and motors, most repairs are finished on the first visit, and your home is warming up before we pack up.
Final Testing
Before we leave, the system runs through full heating cycles while we measure temperature rise against the data plate, confirm combustion and draft on fuel-burning equipment, and check each safety control.
Questions About Heating Repair?
We provide honest advice and upfront pricing on all heating repair work.
Call (415) 234-7418 NowMaintenance Tips for Heating Repair
Taking preventive measures can help you avoid costly heating and cooling problems down the road. Start with these practical measures our team relies on:
- Do not ignore a boom at ignition or a new rattle, since early repairs cost far less
- Leave open space around the furnace so the burners can draw enough combustion air
- Keep heat pump outdoor units clear of snow, leaves, and shrubs so defrost can do its job
- Make sure every level has a working carbon monoxide detector, and test it monthly
- Swap the filter every month while the heat is running, since restricted airflow trips limits and shortens heat exchanger life
- Book a fall tune-up so worn parts are caught before the first cold night
- Move solvents, paints, and pool or laundry chemicals away from the furnace to protect the burners from corrosive vapor
Comparing DIY and Professional Heating Repair
Some simple checks are suitable for DIY, but most heating and cooling repairs benefit from professional tools, training, and experience. Consider the following comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| CO Safety | Invisible risk goes unchecked | Heat exchanger and draft verified |
| Troubleshooting | Guessing from a blinking code | Flame signal and components metered |
| Gas Safety | Small leaks slip by undetected | Every joint checked with a leak detector |
| Heat Pumps | Defrost faults mistaken for dead units | Boards, sensors, and valves tested properly |
| Underlying Cause | Symptom treated, problem left behind | Cause found, not just the symptom |
| Final Testing | Called fixed after a single cycle | Temperature rise measured over full cycles |
Talk to a Heating Repair Expert
Every day you wait puts more strain on a struggling unit. Get Novato HVAC on the job today.
Call (415) 234-7418 TodayAreas We Serve for Heating Repair
Wherever you are in the area, the same experienced team handles your heating repair. Find your community below.