AC repair
Furnace & heating
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateTrusted Furnace Repair for Fremont Homeowners
A furnace that quits in January rarely picks a convenient moment. It usually happens on the first cold morning of the year, when the house won’t hold heat and everyone in it notices within the hour. Our technicians have up to 8 years of experience diagnosing exactly that kind of failure, and we work on the equipment Fremont homes actually have: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard.
We handle furnace repair, full furnace replacement, and AC installation, so the same call covers the heating side and the cooling side of your system. Same-day service is often possible when you call early. Reach us at (855) 473-9061. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Furnace Maintenance
Furnace Maintenance is the scheduled check that catches worn parts before they turn into a no-heat call in the middle of winter. In Fremont, where winters stay mild and the furnace sits idle for months, the most common problems we find are dust-clogged burners, a flame sensor that has drifted out of position, and a blower that’s been running on a dirty filter. All three are cheap to fix during a maintenance visit and more expensive once they’ve stressed other components.
Book it before the first cold snap, or whenever your system has gone a full heating season without a look. We inspect the heat exchanger, clean the burners, check the igniter and flame sensor, test the blower, and confirm the thermostat is calling for heat correctly. A furnace tune up in Fremont typically runs $95 – $235, and the written estimate sets the final price. You get a written report of what we actually found, and our technicians aren’t paid on what they sell.
What a Maintenance Visit Covers
We clean the burners, check the flame sensor and igniter, test the blower motor, inspect the heat exchanger for cracks, and verify the thermostat is calibrated and calling correctly. We also check the filter and the flue for anything blocking proper exhaust. You leave with a written list of what’s healthy and what’s worth watching.
How Often to Schedule One
Once a year, ideally in early fall before heating season starts. Homes with pets or heavy dust benefit from a filter check more often, and older furnaces are worth a look every season. Skipping it doesn’t cause a failure tomorrow, but it does mean small issues compound quietly.
Styles & brands we work with
- AC repair
- Furnace & heating
- Heat pumps
- Ductless mini splits
- Carrier
- Trane
- Goodman
Heat Pump Repair
Heat Pump Repair covers the equipment that heats and cools your home from one unit, which means a failure can hit you in either season. Heat pumps are common in Fremont because the climate suits them, and they tend to fail in specific ways: a reversing valve that sticks, a defrost cycle that runs too long, or auxiliary heat that won’t kick in when the outdoor temperature drops. Any of those shows up as a system that runs constantly without actually heating the house.
We diagnose both sides of the system, which matters because a heat pump problem can look like a furnace problem and vice versa. We check refrigerant charge, the reversing valve, the defrost board, the compressor, and the air handler. Heat pump repair in Fremont typically runs $175 – $825 depending on the part and the diagnosis, and the written estimate sets the final price. If you’re not sure whether you have a heat pump or a furnace, we’ll tell you on the first visit.
Heating and Cooling From One Unit
A heat pump moves heat rather than generating it, so the same components serve both seasons. That’s why a stuck reversing valve can leave you with cold air in January or warm air in July. We test both modes during diagnosis, not just the one that failed.
When Auxiliary Heat Stays On
If the auxiliary or emergency heat runs alongside the heat pump for long stretches, something is off with the primary system or the defrost cycle. It’s worth a diagnostic before it drives up your bill. We check the sequencer, the outdoor sensor, and the defrost board together.
Heating Repair
Heating Repair is the broad category that covers anything in your system that’s supposed to produce warmth, from a gas furnace to a heat pump to the thermostat telling it what to do. You need it when the house won’t reach temperature, when the system short-cycles, when you hear a new noise on startup, or when the blower runs but the air stays cold. Those symptoms point to different components, and guessing at them is how a small repair turns into a replacement.
We diagnose across brands and system types, including dual-fuel setups where a heat pump and a furnace share the load. Our technicians have up to 8 years of experience and work on Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard equipment. Heating repair in Fremont typically runs $175 – $825 depending on what’s failed, and the written estimate sets the final price. For a full look at our heating service, see furnace repair in Fremont.
Diagnosing the Actual Failure
We test the thermostat call, the ignition sequence, the blower, and the safety switches in order rather than replacing parts on suspicion. Multimeter readings on the flame sensor and igniter tell us what’s drifting. That’s how we avoid charging you for a part that was never the problem.
Cross-System Issues
Heating and cooling share a blower, a filter, and often a thermostat, so a heating problem can trace back to an AC component. Because we service both, we catch those overlaps instead of handing you off to a second contractor. It’s one of the reasons we cover the full system rather than one trade.
Boiler Repair
Boiler Repair applies to homes heated by a hot-water or steam boiler rather than forced air, and those systems fail in ways a furnace technician won’t recognize. You need it when radiators stay cold while the boiler runs, when you hear knocking or banging in the pipes, when pressure drops repeatedly, or when the boiler short-cycles. Older Fremont homes with radiator heat still run these systems, and they need someone who knows the difference between a circulator problem and a combustion problem.
We check the circulator pump, the expansion tank, the pressure relief valve, the aquastat, and the burner assembly. We also look for air in the lines, which is the usual cause of cold radiators upstairs while the boiler itself is fine. Boiler repair in Fremont typically runs $175 – $825 depending on the component, and the written estimate sets the final price. If your system is beyond a straightforward fix, we’ll tell you plainly rather than patching it repeatedly.
Pressure and Circulation Problems
A boiler that loses pressure repeatedly usually has a leak or a failed expansion tank, not a mystery. We pressure-test the system and check the relief valve before assuming the boiler itself is at fault. Cold radiators with a hot boiler almost always point to air or a circulator, not the burner.
When to Consider Replacement
An older boiler with a cracked section or a corroded heat exchanger isn’t worth repeated repairs. We’ll explain what a repair buys you in time and what a replacement involves, and we don’t push either. The decision stays with you.
Gas Furnace Repair
Gas Furnace Repair covers the most common heating system in Fremont homes, and it comes with safety considerations that other repairs don’t. You need it when you smell gas, when the furnace won’t ignite, when the flame is yellow instead of blue, when you hear rumbling or popping on startup, or when the system shuts off before reaching temperature. A cracked heat exchanger or a blocked flue is a carbon monoxide risk, and that’s not something to diagnose by ear.
We check the gas valve, the igniter, the flame sensor, the burners, the flue, and the heat exchanger. Any sign of a compromised heat exchanger or exhaust problem gets flagged clearly, and we recommend a trained professional handle combustion work rather than anyone attempting it themselves. Gas furnace repair in Fremont typically runs $175 – $825 depending on the fault, and the written estimate sets the final price. If you ever smell gas, leave the house and call your gas utility first.
Ignition and Flame Sensor Faults
Most no-heat calls on a gas furnace trace to the igniter or the flame sensor, both of which are inexpensive parts. The furnace lights, the sensor fails to confirm the flame, and the system shuts down as a safety measure. We test both with a multimeter before replacing anything.
Safety Checks We Always Run
Every gas furnace visit includes a heat exchanger inspection and a flue check, because those are the parts that matter for carbon monoxide. We also confirm the burners are burning clean and the draft is correct. If something is unsafe, you’ll hear it from us in plain language.
Furnace Tune Up
Furnace Tune Up is the flat-price seasonal service that keeps a working furnace working and catches wear before it becomes a repair. It’s worth scheduling in early fall, before the first cold morning, and any time your system has run a full season without attention. It’s not a repair call, so nothing has to be broken to book one.
We clean the burners, check the igniter and flame sensor, test the blower motor and capacitor, inspect the heat exchanger, verify the flue, and confirm the thermostat is calling correctly. You get a written report of what we found, including anything worth watching. A furnace tune up in Fremont typically runs $95 – $235, and the written estimate sets the final price. Our technicians aren’t paid on what they sell, so the report reflects the equipment, not a sales target.
Flat Price, Written Report
The tune up price is set before we start, and you get a written summary of everything we checked and what condition it’s in. If we find a part that’s wearing, we tell you what it costs and let you decide. No pressure either way.
The Right Time to Book
Early fall is ideal, before the heating season starts and the schedule fills. A spring check works too if you missed fall. Either way, one visit a year keeps a gas furnace running safely and efficiently.
Emergency Furnace Repair
Emergency Furnace Repair is for the situations where waiting isn’t reasonable: no heat on a cold night, a gas smell, a furnace that trips the breaker repeatedly, or a system blowing cold air when the house needs warmth. In Fremont the winters are mild, but a failed furnace with an infant, an elderly family member, or anyone with health concerns in the house is still urgent, and it’s worth treating that way.
Call (855) 473-9061. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. A call outside dispatch hours is booked into the next opening, Sunday through Friday, 7am to 7pm. Same-day service is often possible when you call early in the day. Emergency furnace repair in Fremont typically runs $175 – $825 depending on the fault, and the written estimate sets the final price. There’s no overtime charge, and the estimate is free.
What Counts as Urgent
A gas smell, a carbon monoxide alarm, or a furnace that won’t stay lit are the clearest cases. No heat with vulnerable people in the home counts too. For a gas smell, leave the house and call your gas utility before calling us.
How to Prepare Before We Arrive
Check the thermostat batteries, confirm the breaker hasn’t tripped, and replace a clogged filter if you have one on hand. Note any noise or smell you noticed and when it started. Clear access to the furnace so we can get to it without moving furniture.
Brands We Service
We service Carrier equipment and know where it wears out: the igniter and flame sensor on older models, and the control board on newer ones. Trane and Lennox systems tend to hold up well but develop specific faults in the blower and the pressure switch, and we’ve seen enough of them to diagnose quickly. Rheem and York furnaces are common in Fremont, and their ignition and gas valve issues follow recognizable patterns.
We also work on Daikin, Bryant, and American Standard, plus Goodman at the value end of the market. Because we cover nine major brands, a replacement recommendation comes down to your home’s load and your budget, not what we happen to have on hand. Whether you have a Bryant furnace or any other make on our list, we can help. If you’re weighing repair against replacement, our furnace repair team in Newark handles the same work.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- You smell gas. A faint gas odor near the furnace means a leak somewhere in the supply line or the valve. Leave the house, call your gas utility, then call us.
- The furnace won’t stay lit. It ignites and shuts off within seconds, which usually means the flame sensor or the igniter has failed. That’s a safety shutdown, not a quirk.
- You hear rumbling or popping on startup. Delayed ignition causes a small gas buildup before the burner lights. It’s worth a diagnostic before it gets worse.
- The blower runs but the air is cold. The furnace isn’t igniting even though the fan works, which points to the ignition system or the gas valve.
- Your carbon monoxide alarm goes off. Get everyone out and call the fire department or your gas utility first. A cracked heat exchanger or blocked flue is the usual cause.
Our Process, Step by Step
- 1
You call and describe the problem. We ask what the system is doing, how long it’s been happening, and whether you’ve noticed any smell or noise. That helps us arrive prepared with the right diagnostic tools.
- 2
We diagnose before we quote. A technician tests the thermostat call, ignition sequence, flame sensor, blower, and safety switches with a multimeter. We check the heat exchanger and flue on every gas furnace visit.
- 3
You get a written estimate. The price is set per job by the written estimate, and it’s free. We explain what failed, what the repair involves, and whether a replacement is worth considering.
- 4
We do the repair. Most common faults, like an igniter, flame sensor, or blower capacitor, can be handled in a single visit. Larger jobs get scheduled with a set date.
- 5
We test the system before we leave. We run a full heating cycle, confirm the furnace reaches temperature and holds it, and check that the safety switches are working. You get a written record of what we did.
How Much Does Furnace Repair Cost in Fremont?
A typical furnace repair in Fremont runs $175 – $825 depending on what failed and how long the diagnosis takes. A flame sensor or igniter replacement sits at the low end of that range. A blower motor, control board, or gas valve replacement lands near the top. Heat pump repairs, boiler work, and gas furnace repairs all fall within the same $175 – $825 window, and the written estimate sets the final price.
What moves the number: the part itself, whether the fault is straightforward or requires tracing an intermittent problem, and whether the system needs a safety component like a heat exchanger addressed. Brand matters less than you’d think, since we work on nine major makes and aren’t limited to one parts channel.
How to avoid overpaying: get a written estimate before any work starts, ask what the technician tested and what reading led to the diagnosis, and be skeptical of a repair quote that arrives without a diagnostic step. A tune up at $95 – $235 is the cheaper path when nothing’s broken yet.
What’s included in a free estimate: the diagnostic, a plain-language explanation of the fault, the repair price, and a recommendation on repair versus replacement if it’s close. No service-call fee, no trip charge. Call (855) 473-9061 for an exact quote.
Our Service Area Near Fremont
We serve Fremont and the surrounding cities, including Milpitas, Union City, Newark, and Pleasanton. Farther out, we cover Monte Sereno, Mountain View, East Palo Alto, Menlo Park, and Los Altos. Response times depend on the day and the call volume, and same-day service is often possible when you call early. For homes south of us, our furnace repair team in Monte Sereno covers the same work. If you’re not sure whether you’re in range, call and we’ll tell you straight.
Serving Fremont, CA – Our Local Coverage Area
We serve Fremont and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
Frequently Asked Questions About Furnace Repair in Fremont
Furnace repair is the diagnostic and fix work that restores a heating system that’s failed or is running poorly. It covers the igniter, flame sensor, gas valve, blower motor, control board, heat exchanger, and thermostat call. We test each component in sequence rather than replacing parts on suspicion. If the fault turns out to be a heat pump or boiler issue, we handle those too.
Most common repairs take one to two hours once we’ve diagnosed the fault. An igniter or flame sensor swap is quick; a blower motor or control board takes longer. If the part needs to be ordered, we schedule a return visit with a set date. The written estimate tells you what to expect before we start.
Furnace repair in Fremont typically runs $175 – $825, and the written estimate sets the final price. A flame sensor or igniter sits near the low end; a blower motor or gas valve near the top. A tune up at $95 – $235 is the cheaper option when nothing’s broken. Call (855) 473-9061 for an exact quote, and the estimate is free.
Yes. We’re certified to install, repair, and replace systems from Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. That means we diagnose your existing equipment without brand-matching guesswork. If your system is one of those nine, we’ve seen its failure patterns before.
Same-day service is often possible when you call early in the day. We answer 24/7, and fast dispatch runs from 7am to 7pm, Sunday through Friday. We’re closed Saturday. A call outside dispatch hours is booked into the next opening.
Warranty terms depend on the part and the manufacturer, and we’ll state them in writing on your estimate before any work starts. We don’t quote warranty coverage we can’t confirm. Ask the technician and it goes on the paperwork.
Clear access to the furnace, replace a clogged filter if you have one on hand, and check that the thermostat has fresh batteries. Note any noise, smell, or timing detail you noticed. If you smell gas, leave the house and call your gas utility first.
Schedule Your Furnace Repair Service in Fremont Today
If your furnace won’t light, won’t hold temperature, or is making a noise it didn’t make last year, call (855) 473-9061. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday. Same-day service is often possible when you call early. Estimates are free, with no obligation. See our Fremont AC Repair page for cooling work, and our AC Installation and Furnace Replacement services when a repair no longer makes sense.
Written by the team at Fremont AC Repair.