Furnace Repair in Pasadena - Same-Day Repair, Priced Before We Start

Trusted Furnace Repair for Pasadena Homeowners

A furnace that won’t fire on a cold Pasadena night isn’t just an inconvenience; it’s a safety and comfort problem that needs Furnace Repair - Pasadena fast. Dalton Heating & Air Pasadena has been putting furnaces right since 2003, and we’ve seen every failure mode a San Gabriel Valley winter can produce, from cracked heat exchangers in Altadena bungalows to failed igniters in Arcadia tract homes. We answer the phone 24/7 with a live person, show up inside the stated window, and put the price in writing before we touch a single component. Most furnace repairs in Pasadena run $150 to $700 depending on the part, and the work is guaranteed in writing for a full year. If it fails in that time, we return at no charge. Call (626) 657-5344 and you’ll talk to someone who can dispatch a background-checked, factory-trained technician today.

Call (626) 657-5344

Key Takeaways:

• Furnace repair in Pasadena typically costs $150 to $700, with the written price locked before work begins.
• Every repair carries a 365-Day Done Right Promise: if it fails within a year, the return visit is free.
• Live phone support, 24/7, with a real person who can schedule same-day service in Pasadena and surrounding cities.
• Factory-trained on Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard.

Furnace Maintenance

Furnace Maintenance is the scheduled service work that keeps your heating system from failing at the worst possible moment. Around Pasadena, where furnaces can sit idle for months while the AC carries the load, the first cold snap of November is when neglected units show their age. Dalton Heating & Air Pasadena performs a full maintenance inspection for $80 to $200, which includes cleaning the burners, checking the heat exchanger for cracks, testing the igniter and flame sensor, and measuring gas pressure against the manufacturer’s spec. It’s cheaper than any repair and it catches failures while they’re still small. The Garrison Standard means our maintenance checklist is the same every time, and our technicians are not paid on what they sell.

Annual Inspection Before the Heating Season

The best time for a furnace check in Pasadena is September or October, before the first real cold front rolls down from the San Gabriels. We test every safety switch, inspect the venting for blockages or corrosion, and confirm the system is producing the correct temperature rise across the heat exchanger. If we find a worn part, you get a written quote to fix it on the spot, with no pressure and no surprise fee.

Filter, Airflow, and Burner Care

A dirty filter or weak airflow causes more Pasadena furnace failures than any single mechanical part. We check the blower motor amp draw, inspect the plenum for leaks, and clean the burner assembly so the flame burns blue and even. If your filter is clogged, we’ll show it to you and tell you exactly what it’s doing to your system.

Heat Pump Repair

Heat Pump Repair covers the repair of systems that both heat and cool your home, and in Pasadena’s mild climate, that’s often the only HVAC equipment a house has. When a heat pump loses its heating mode in a cold snap, the usual culprits are the reversing valve, the defrost board, or a refrigerant leak that’s been bleeding charge since summer. Dalton Heating & Air Pasadena repairs heat pumps for the same $150 to $700 range as furnace work, with the written price settled before we open the panel. We service every major brand and keep common reversing valves and defrost sensors on our trucks for one-trip fixes in Pasadena, Altadena, and Arcadia.

Reversing Valve and Defrost Board Replacement

The reversing valve is the component that flips your heat pump between heating and cooling, and when it sticks, you get cold air in heat mode or warm air in cool mode. We diagnose the valve electrically before condemning it, because a failed solenoid coil is a $200 fix where a full valve replacement is closer to $600. The defrost board controls the cycle that clears ice from the outdoor coil, and a failed board can leave the unit frozen solid even on a mild Pasadena morning.

Low Refrigerant and Leak Repair

A heat pump that’s lost charge will struggle to heat because there’s not enough refrigerant to move heat from the outdoor air into your home. We use electronic leak detectors to find the pinhole, repair the leak, and weigh in the exact charge per the manufacturer’s spec plate. No topping off without finding the leak; that’s a Band-Aid that costs more in the long run.

Heating Repair

Heating Repair is the broad work of restoring any heating system to safe, reliable operation, whether it’s a forced-air furnace, a heat pump, a wall heater, or radiant floor heat. In Pasadena’s older housing stock, from Spanish colonials near the Rose Bowl to mid-century ranches in Furnace Repair - San Gabriel, we see systems that have been patched together for decades by whoever was cheapest that year. Dalton Heating & Air Pasadena treats every heating repair as a diagnostic job first: find the root cause, explain it in plain English, and give you a written price before any wrench turns. Most repairs fall between $150 and $700, and the repair is guaranteed in writing for a full year.

Ignition, Thermostat, and Control Work

Modern furnaces use an electronic igniter or intermittent pilot, and when that ignition source fails, the furnace simply won’t light. We test the igniter’s resistance, check the flame sensor’s microamp signal, and verify the thermostat is sending the right call for heat. A failed thermostat can mimic a dead furnace, and we check that first before quoting anything expensive.

Airflow and Duct-Level Diagnosis

Half the heating complaints we get in Pasadena turn out to be airflow problems, not combustion problems. A collapsed return duct, a closed damper, or a blower wheel caked in years of dust will starve the furnace and trip the high-limit switch. We measure static pressure and inspect the duct system where accessible so we’re not replacing parts the system never needed.

Boiler Repair

Boiler Repair is the specialized work of fixing hydronic heating systems that circulate hot water through radiators, baseboards, or in-floor tubing. These systems are common in Pasadena’s older homes, especially the pre-war neighborhoods north of the 210, and they have their own failure modes: circulator pumps that seize, expansion tanks that water-log, and pressure relief valves that drip. Dalton Heating & Air Pasadena works on residential boilers and most boiler repairs fall in the $150 to $700 range, with the price in writing before we start. We’ll diagnose the whole loop, not just the part that failed, because a boiler problem is rarely just one component.

Circulator Pumps and Zone Valves

If one room stays cold while the rest of the house heats, a stuck zone valve or a dead circulator pump is the usual cause. We check the valve actuator’s voltage, test the pump’s amp draw, and isolate the failed component before quoting a repair. Replacing a seized circulator is a common one-trip fix, and we keep common Taco and Grundfos pumps on the truck.

Expansion Tank and Pressure Issues

A water-logged expansion tank will make the system pressure spike every time the boiler fires, which stresses every fitting and valve in the loop. We test the tank’s air charge, and if it’s failed, we replace it and re-pressurize the system to the correct cold fill pressure. Low boiler pressure is just as disruptive, and we trace it to the source: a slow leak, a bad fill valve, or an airbound loop.

Gas Furnace Repair

Gas Furnace Repair is the specific repair of furnaces that burn natural gas, and it carries a safety dimension that other HVAC work doesn’t. A cracked heat exchanger can put carbon monoxide into your living space, and a gas valve that’s leaking or failing to close properly is a fire hazard. Dalton Heating & Air Pasadena treats every gas furnace repair with that seriousness, which is why we perform a combustion analysis and a visual heat exchanger inspection on every service call. Repairs run $150 to $700 for most parts, and because we’re working with gas and combustion, we’d rather you call us than open the cabinet yourself. Marco Benitez, who leads our Pasadena operation, has built our process around this rule: we diagnose the failure completely, show you what we found, and fix it to the code book.

Heat Exchanger Inspection and Safety Testing

We inspect the heat exchanger with a borescope and check carbon monoxide levels in the flue and the supply air, because a hairline crack won’t always trip the safety switch. If we find a crack, we’ll show you the photo and red-tag the unit until the repair or replacement decision is made. That’s not scare tactics; it’s the same standard we’d apply in our own homes.

Gas Valve and Burner Assembly Repairs

A gas valve that’s slow to open or that won’t hold pressure will cause intermittent no-heat calls, the kind that drive homeowners crazy because the furnace works when the tech is there. We test the valve’s inlet and outlet pressure, check the regulator, and inspect the burner orifices for spiders and debris, which are a common Pasadena problem in furnaces that sit idle all summer. Clean orifices and a healthy gas valve get the flame blue and even again.

Furnace Tune Up

A Furnace Tune Up is the preventive service, not the repair call, and in Pasadena it’s the cheapest insurance you can buy for your heating system. The tune up costs $80 to $200 and includes the same combustion and safety checks we do on a diagnostic visit: burner cleaning, flame sensor cleaning, thermostat calibration, gas pressure verification, and a full safety switch test. Dalton Heating & Air Pasadena performs tune ups on all major brands, and we give you a written report of everything we found, including photos and a plain-language explanation. The point is to catch a $120 flame sensor before it becomes a $400 no-heat call at midnight.

What We Test and Clean

On every tune up we clean the flame sensor, which is the number one cause of furnaces that light and then shut off after a few seconds. We also check the igniter’s resistance, measure the temperature rise across the heat exchanger, and inspect the condensate drain on high-efficiency units. These are the small items that fail without warning and leave you without heat on the first cold morning of the year.

The Report You Keep

After the tune up, you get a written summary of everything we checked, everything we found, and anything we recommend watching. There’s no upsell attached; our technicians are paid the same whether you approve extra work or not. If we find something that needs attention, you’ll get a written quote for that specific item, and you can approve it or decline it with zero pressure.

Emergency Furnace Repair

Emergency Furnace Repair is what Pasadena homeowners need when the furnace quits during the coldest week of the year, and this is where Furnace Repair - San Marino and Dalton Heating & Air’s 24/7 live answering makes the difference. You’re not leaving a voicemail and hoping for a callback by noon; a real person answers, takes the details, and dispatches a technician who can be at your door the same day. The repair pricing doesn’t change because it’s an emergency: you still get the written price before work starts, and the job still carries the full-year written guarantee. Most emergency furnace repairs in Pasadena run $150 to $700 for the part and the labor, and there’s no overtime surcharge for nights or weekends.

Same-Day and After-Hours Response

We keep emergency slots open in the schedule every day, including holidays, because furnaces don’t fail on a 9-to-5 rhythm. The dispatch process is the same at 2 a.m. as it is at 2 p.m.: a live person answers, a uniformed technician is assigned, and you get a text with the tech’s name and photo before they arrive. We service the entire Pasadena area with typical response times under two hours for emergency calls.

What to Do Before the Tech Arrives

If your furnace is making a smell or a sound that concerns you, turn it off at the thermostat and, if you can safely do so, at the furnace’s power switch. Open a window if you suspect any gas odor, and if you smell gas strongly, leave the house and call 911 first, then call us. Don’t keep resetting the breaker; a furnace that trips a breaker repeatedly has a real fault, and resetting it can make the problem worse.

Brands We Service

Dalton Heating & Air Pasadena is factory-trained on Carrier and Trane equipment, the two most common furnace brands in Pasadena’s housing stock. We’ve serviced hundreds of Carrier Infinity and Performance series furnaces, and we know their pressure switch and inducer failure patterns better than most shops. Trane’s S and X series furnaces are built well, but their igniters and flame sensors still fail on a schedule, and we keep those parts stocked locally so we’re not running to a supply house during your service call.

We also carry OEM and matched aftermarket parts for Lennox and Goodman systems, which are common in Pasadena’s mid-century homes and newer condo developments. Whether you have a Lennox Elite or a Goodman builder-grade unit, our diagnostic approach is the same: test the part, confirm the failure, quote the fix in writing. If you have a Carrier, Trane, Lennox, Goodman, or any other make, we can help.

Signs You Need a Pro Right Now

• Short cycling. Your furnace fires up, runs for two or three minutes, then shuts off, over and over. This is usually a dirty flame sensor or an overheating condition, and running it this way stresses the heat exchanger and wastes gas.
• Yellow or flickering flame. A healthy gas furnace flame is blue and steady. Yellow or orange flame means incomplete combustion, which can produce carbon monoxide and indicates a burner or venting problem that needs immediate attention.
• Rumbling, banging, or popping sounds. Rumbling on startup often means delayed ignition; gas is pooling in the burners before it lights, and that’s a dangerous condition. Popping or banging during operation can be duct expansion or a failing blower wheel.
• Cold air blowing from registers. If the furnace runs but the air coming out is cool or lukewarm, the burners may not be firing at all, or the limit switch may be tripping. Either way, the system is not heating and it’s working harder than it should.
• Persistent cold spots or a spike in the gas bill. A furnace that’s losing efficiency often shows it in the utility bill first. If a room that used to stay warm now stays cold, or your gas usage jumped without a change in habit, there’s a mechanical reason for it, and it’s findable.

Our Process, Step by Step

1. 1
   You call, a person answers. Twenty-four hours a day, every day. You tell us what the furnace is doing, we schedule a window that works, and you get a text with the technician’s name and photo before they roll.
2. 2
   Diagnostic testing, not guesswork. The technician starts by listening to the system’s behavior, then tests the electrical and gas components systematically: igniter resistance, flame sensor microamps, gas valve pressures, limit switch continuity, and blower motor amp draw. If there’s a combustion issue, we run a carbon monoxide check as standard practice.
3. 3
   Written price before any repair. Once we know what’s wrong, you see the exact cost of the part and labor in writing. No ranges, no “we’ll see how it goes.” The price on that sheet is the price you pay, period.
4. 4
   The repair, done by the book. We install the part, test the full cycle multiple times, check combustion safety after the repair, and confirm the system reaches and holds setpoint. We clean the work area before we leave.
5. 5
   Your written guarantee. Every repair carries the 365-Day Done Right Promise in writing. If the same repair fails within a year, the return visit is free. That’s the Garrison Standard, and it applies to every job in Pasadena, no exceptions.

How Much Does Furnace Repair Cost in Pasadena?

Our Service Area Near Pasadena

Dalton Heating & Air Pasadena covers the entire San Gabriel Valley, with same-day service in Pasadena, Altadena, Arcadia, and San Gabriel. We also run scheduled calls in Alhambra, Monterey Park, Rosemead, Temple City, Monrovia, and Pico Rivera, with typical response times under two hours for emergency calls in Pasadena proper. If you’re east of the 710, see our Furnace Repair in East Los Angeles page. If you’re in the El Monte area, we have a dedicated Furnace Repair in El Monte service route. And if you’re reading this from Pasadena, you’re already on the right page for Furnace Repair in Pasadena.

Frequently Asked Questions About Furnace Repair in Pasadena

Schedule Your Furnace Repair Service in Pasadena Today

When the furnace quits in Pasadena, you don’t have time for a shop that takes messages and calls back when it’s convenient. Call Dalton Heating & Air Pasadena at (626) 657-5344 and you’ll get a live person, a same-day appointment, and a written price before any work begins. The estimate is free, the repair is guaranteed for a full year, and the person on the phone knows exactly what happens next. If your furnace is down, call now; if it’s acting up, call before it goes down for good. We’re ready 24/7.

Written by Marco Benitez, Owner at Dalton Heating & Air Pasadena, serving Pasadena since 2003.