Seasonal 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.
Before
After
Before
After
Before
AfterTrusted Furnace Repair Nationwide
A furnace that quits in the middle of a cold night is more than a frustration. It can freeze pipes, force your family into hotels, and turn a small mechanical problem into a household emergency. The Complete Furnace Repair Guide for Los Angeles Homeowners explains that furnace repair is the work of finding why your heating system stopped producing or circulating warm air, replacing the failed part, and getting your home back to a safe, comfortable temperature. Coldharbour Heating & Air has handled furnace repairs since 2003 through independently owned and operated Kingswell crews across the country. When your heat goes down, our techs arrive in a firm window, diagnose the issue, hand you a written price before any work begins, and back the repair with our 365-Day Done Right Promise. If your furnace is acting up, call (817) 402-2972 and a live person answers, day or night.
Key Takeaways
- Most furnace repairs run $150-$700, with the final price written down before work starts.
- Every repair carries a 365-Day Done Right Promise in writing, not just a handshake.
- Live people answer the phone 24 hours a day, 7 days a week.
- Technicians service nine major furnace brands, including Carrier, Trane, and American Standard.
Furnace Maintenance
Furnace Maintenance is the scheduled service work that keeps a heating system running efficiently and catches small problems before they become furnace repairs. Most manufacturers recommend a professional tune-up once a year, ideally in early fall before the first hard freeze, though a neglected system that has not been opened in several seasons may need attention sooner. Coldharbour Heating & Air performs a full maintenance visit: cleaning the burners, checking the heat exchanger for cracks, testing the ignition sequence, measuring gas pressure, and inspecting safety controls so carbon monoxide risk stays at zero. A maintenance visit typically runs $80-$200, far less than an emergency repair. For that price you get a written report of what we found, what we fixed, and what may need attention next season.
Annual System Check
Once a year, a furnace should be opened, cleaned, and tested under load. We run the system through a complete heating cycle and measure temperature rise across the heat exchanger so you know the furnace is doing what it was designed to do.
Filter and Airflow Inspection
A clogged filter makes the blower work harder and can trip the high-limit switch, which shuts the furnace down. We check the filter, the blower wheel, and the duct pressure, then show you what the airflow numbers mean in plain English.
Heat Pump Repair
Heat Pump Repair covers a system that both heats and cools by moving heat between indoors and outdoors, and when it fails in winter the house can feel just as cold as if a gas furnace had died. If your heat pump is blowing cold air in heat mode, icing over heavily, short cycling, or making a grinding noise at the outdoor unit, those are repair calls, not maintenance calls. Coldharbour Heating & Air diagnoses heat pump issues including reversing valve failures, low refrigerant charge (the cooling fluid that carries heat), failed defrost boards, and compressor start problems. Most heat pump repairs fall in the $150-$650 range, and the written estimate includes both parts and labor before a tool comes out.
Heat Pump Defrost Problems
In cold weather a heat pump should periodically defrost its outdoor coil. When the defrost board or sensor fails, the coil becomes a block of ice and the system stops heating. We test the board, the sensor, and the reversing valve in one visit.
Refrigerant Leak Repairs
A heat pump low on refrigerant will not heat properly and may freeze up. We locate the leak with an electronic detector, repair the joint or coil, and recharge the system to the manufacturer’s exact specification, then verify the pressure holds.
Heating Repair
Heating Repair is the broad category of fixing any system that generates or distributes warm air, including furnaces, heat pumps, boilers, and the controls that run them. Before deciding whether to tackle an issue yourself, consider reading DIY vs Professional Furnace Repair: What’s Safe to Do Yourself. Homeowners often call when the thermostat says heat but the house stays cold, when the system fires up and shuts down in seconds, or when the blower runs constantly without ever satisfying the temperature setting. Coldharbour Heating & Air treats heating repair as a two-part job: find the root cause, then explain to the homeowner exactly what failed and what the fix costs before starting. Most heating repairs land between $150-$700, with the spread driven by whether the failed part is a simple igniter or a major component like a blower motor or control board.
Thermostat and Control Issues
Sometimes the furnace is fine and the thermostat is lying to it. We verify the signal path from thermostat to control board, rule out wiring problems, and replace or recalibrate the thermostat when it is the culprit.
Air Distribution Repairs
A furnace that fires but does not warm the far rooms often has an airflow problem: a failing blower, a closed damper, or duct leakage. We measure static pressure and inspect the blower so the repair targets the actual restriction, not a guess.
Boiler Repair
Boiler Repair is work on hydronic heating systems that heat water and circulate it through radiators, baseboards, or in-floor tubing instead of blowing hot air through ducts. Boilers fail differently from furnaces: pumps seize, pressure relief valves leak, expansion tanks waterlog, and air gets trapped in the loops. Coldharbour Heating & Air services residential boilers and repairs circulator pumps, zone valves, expansion tanks, pressure controls, and venting, along with the electrical controls that sequence the burners. Boiler repairs generally run $150-$700, though the exact number depends on which component failed and whether the system needs flushing. Every boiler repair gets the same written 365-Day Done Right Promise as any furnace repair.
Circulator Pump Replacement
When a circulator pump fails, heat stops moving to the rooms even though the boiler fires. We confirm the pump is the failure with an amp draw test, then replace it and bleed the air from the system so every loop is hot again.
Pressure and Expansion Tank Service
A boiler that loses pressure or trips its relief valve usually has a failed expansion tank or a waterlogged air cushion. We check the tank’s charge and the relief valve, then correct the pressure so the system runs within its safe range.
Gas Furnace Repair
Gas Furnace Repair focuses on the fuel side of the heating system: gas valves, burners, igniters, flame sensors, and the safety circuits that make a gas furnace safe to operate. A gas furnace that short cycles, makes a booming sound at ignition, or smells of gas near the unit should be shut down and checked by a professional immediately. Coldharbour Heating & Air repairs gas furnace components including hot surface igniters, flame sensors, gas valves, pressure switches, and draft inducer motors. Most gas furnace repairs land in the $150-$700 range; an igniter replacement often runs $150-$280, while a gas valve replacement runs higher. Any suspected gas odor means leaving the house and calling your utility first, then us for the repair.
Igniter and Flame Sensor Work
Most no-heat calls on gas furnaces trace to a failed hot surface igniter or a dirty flame sensor. We test both with a multimeter, clean or replace the failed part, and verify the burner lights smoothly through ten full cycles before we leave.
Gas Valve and Pressure Switch Testing
A furnace that fires only intermittently often has a failing gas valve or a pressure switch that will not prove draft. We measure the gas pressure at the manifold and test the switch against the inducer’s actual vacuum so we replace only the part that failed.
Furnace Tune Up
A Furnace Tune Up is a preventive service visit that cleans, tests, and adjusts the major components of a furnace so it runs safely and efficiently for the heating season ahead. The work includes cleaning the burners, checking the heat exchanger, testing the igniter and flame sensor, measuring gas pressure, tightening electrical connections, and verifying the safety controls. Coldharbour Heating & Air offers tune-ups at a flat $80-$200, with a written report of every measurement we took and any repair we recommend, dollar figure included. We do not pay our technicians commission on what they sell during a tune-up, so the recommendations you get are based on the condition of the furnace, not a sales target.
Combustion Safety Test
A furnace that burns dirty can produce carbon monoxide without ever tripping its limit switch. We test combustion gas with an analyzer, check the heat exchanger for cracks, and confirm the venting is moving exhaust out of the house.
Efficiency and Airflow Check
A tune-up should end with numbers, not just a clean bill. We measure temperature rise, check the blower motor amperage, and record system static pressure so you can see the furnace is moving the right amount of heat for the fuel it burns.
Emergency Furnace Repair
Emergency Furnace Repair is the no-heat call in freezing weather, the one where waiting until Monday is not an option. Coldharbour Heating & Air keeps live people on the phones 24 hours a day, 7 days a week, and dispatches technicians to emergency calls with the same written-price rule we use on routine appointments. The emergency rate does not change because it is after hours: the repair price is the repair price, set before work begins and honored when the invoice is written. Emergency repairs still fall inside the normal $150-$700 range for most furnace work. If your furnace fails during a hard freeze, call (817) 402-2972 and talk to a person, not a voicemail tree.
No-Heat Dispatch
When the thermostat calls for heat and the furnace does not answer, we treat that as a priority dispatch. The technician arrives with a truck stocked with the igniters, flame sensors, pressure switches, and capacitors that fail most often, so most no-heat calls are fixed in a single visit.
After-Hours and Weekend Calls
Furnaces do not fail on a schedule. Our live-answer phone line and emergency dispatch run around the clock, every day of the year, with no overtime surcharge added to the repair price and no change in the written guarantee.
Brands We Service
Our technicians train on the systems homeowners actually have in their homes. We service Carrier furnaces and heat pumps regularly, including their Infinity and Performance lines, and we keep the diagnostic routines for their communicating thermostats current. When a Carrier unit throws an error code, our techs know what the code means before they open the cabinet.
We also work on American Standard furnaces, which are built on the same platform as Trane equipment. Our technicians understand the shared parts families and can often repair an American Standard unit with OEM parts on the first trip. And for Daikin systems, including their modulating gas furnaces, we follow the manufacturer’s service bulletins and pressure-testing procedures. Whether you have Carrier, American Standard, Daikin, or any other make, we can help.
Signs You Need a Pro Right Now
- The furnace runs but the house gets colder. This often means the burners are firing but the heat is not moving, which points to a blower, duct, or control board failure. The furnace is burning fuel for nothing and the problem will not fix itself.
- You hear a bang or boom when it lights. Delayed ignition happens when gas builds up before the igniter finally fires, and it can crack a heat exchanger over time. Call a technician before the next ignition cycle.
- The furnace starts and stops every few minutes. Short cycling is a symptom of overheating, a failing limit switch, or an airflow restriction like a clogged filter. Each cycle adds wear to a part that will eventually fail on the coldest day.
- You smell gas near the furnace. If the odor is strong, leave the house and call your utility from outside. If it is faint and intermittent, shut the furnace down and have a technician test the gas line and valve connections.
- Pilot lights flicker or the flame burns yellow. A healthy gas flame burns blue. Yellow or orange flames mean incomplete combustion, which can indicate a cracked heat exchanger or poor venting, both carbon monoxide risks.
Our Process, Step by Step
- 1
Call and talk to a person. You reach a live dispatcher at (817) 402-2972, any hour of any day. We take the details of the symptom, the system brand if you know it, and give you a firm arrival window.
- 2
Our technician arrives in the window. The tech shows up in uniform, with identification, and starts by asking what you observed before the furnace failed. That conversation usually points to the right test before any tools come out.
- 3
Diagnosis with written findings. We test components with a multimeter, measure gas pressure with a manometer, and check the heat exchanger and safety circuits. The technician then shows you what failed, in plain English, before recommending any repair.
- 4
Written price before the work. You get the repair cost on paper, parts and labor both, before a single tool is picked up. That price does not change after the work is done, no matter what else the tech finds during the repair.
- 5
The repair, the cleanup, and the guarantee. The technician completes the repair, runs the furnace through multiple heating cycles, cleans the work area, and hands you the written 365-Day Done Right Promise. If the same repair fails inside a year, we come back and fix it at no charge.
How Much Does Furnace Repair Cost?
Most furnace repairs fall between $150 and $700 nationwide, with the exact figure tied to which component failed and how hard it is to reach. A typical igniter replacement runs $150-$280, parts and labor included. A flame sensor cleaning or replacement runs $120-$250. A draft inducer motor can run $300-$600 depending on the model, and a gas valve replacement often lands between $250 and $500. A full control board replacement sits at the higher end of the range, typically $350-$700.
What changes the price is parts availability, the system’s age, and access to the furnace. An attic furnace with tight clearance takes longer to service than a basement unit with standing room, and the written estimate reflects that labor. To avoid overpaying, ask for the price in writing before work begins, question any quote that comes in under $100 with no diagnosis, and be wary of technicians who want to replace the whole furnace before testing the part that failed. Our free estimates include the diagnostic, the written price, and the warranty, with no obligation to proceed.
Where We Work
Coldharbour Heating & Air serves homeowners and businesses across the United States through local Kingswell crews, including Furnace Repair in Huntington Park. Each crew operates independently under the same written standards: a price before the work, a firm arrival window, a clean job site, and a 365-day guarantee on every repair. Wherever the winters are cold and the furnaces work hard, a Coldharbour technician is nearby.
Frequently Asked Questions About Furnace Repair
Furnace repair is the process of diagnosing and fixing the mechanical, electrical, or fuel-system component that stopped your furnace from heating properly. It typically begins with a diagnostic visit to test the ignition system, gas valve, blower, controls, and safety circuits. The repair itself replaces or corrects the failed part, and should always be followed by a written guarantee on the work.
Most common repairs, like an igniter or flame sensor replacement, take between 45 and 90 minutes once the technician begins work. Larger jobs like a draft inducer or control board replacement can take two to three hours. The diagnostic visit adds time to the total, and your technician will tell you the expected duration before the work starts.
Most furnace repairs run $150-$700, with the final cost tied to which part failed and how accessible the furnace is. A typical igniter replacement is $150-$280, while a gas valve or control board replacement sits at the higher end of the range. Coldharbour Heating & Air gives you the written price before any work begins, so the number you agree to is the number on the invoice. Call (817) 402-2972 for an exact quote on your furnace.
Yes, our technicians are trained on Carrier furnaces and heat pumps, including the Infinity and Performance lines. We also service Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard systems. The technician who arrives at your door is prepared to work on whatever system is already in your home, not just one brand.
Yes, Coldharbour Heating & Air answers phones with live people 24 hours a day and dispatches emergency furnace repair calls every day of the year. There is no after-hours surcharge, and the 365-Day Done Right Promise covers emergency work the same as any routine repair. If you have no heat tonight, call (817) 402-2972 and talk to a person now.
Every repair from Coldharbour Heating & Air includes the 365-Day Done Right Promise: a written guarantee that if the repair fails within one year, we return and correct the work at no additional charge. The guarantee is on paper before the technician leaves your home. It covers the parts we replaced and the labor we performed, for a full 365 days.
Clear a path to the furnace and move any boxes, totes, or stored items at least three feet away from the unit. If you have a filter on hand, set it out where the technician can see it. Know which thermostat controls the system and be ready to describe the symptom: when the furnace stopped heating, what it sounded like, and whether any error codes appeared.
Schedule Your Furnace Repair Service Today
If your furnace is down or acting up, call (817) 402-2972. A live person answers around the clock, your technician arrives in the window we give you, and the repair price is in writing before work begins. Every repair is covered by the 365-Day Done Right Promise. Call now for a free, no-obligation estimate.
Written by Victor Mancini, Owner at Coldharbour Heating & Air, serving homeowners across the United States since 2003.