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Furnace Repair in Houston, TX - Accurate Diagnosis and Same-Day Repair
75 Degree AC repairs gas furnaces, electric furnaces, and every residential furnace type across Houston TX. Our licensed contractors diagnose igniter failures, flame sensor faults, gas valve problems, blower motor issues, and control board malfunctions. We carry common furnace parts on every truck so most repairs are completed in a single visit.
Furnace Repair Experience Houston Homeowners and Businesses Count On
75 Degree AC works on furnace repair calls across Houston every day. Our contractors diagnose and fix gas furnaces, electric furnaces, condensing and non-condensing units, single-stage and two-stage systems in every configuration. That hands-on experience with furnace repair helps us tell the difference between a failed igniter and a deeper control board problem without replacing parts that do not need it.
The full repair price is given before any work begins, with no surprise add-ons or changes once the job starts. When a furnace can be repaired for less than the cost of replacement, we fix it and test the system. When replacement makes better financial sense, the reason is explained clearly with both options and pricing laid out.
Same-day furnace repair in Houston is available with licensed contractors. Common parts like igniters, flame sensors, capacitors, gas valves, and blower motor capacitors are stocked on every truck, which allows most furnace repairs to be completed in one visit without unnecessary delays.
Common Furnace Problems Our Professional Team Fixes in Houston
Igniter Failure
The hot surface igniter is one of the most common parts to fail in a gas furnace. When the igniter cracks or loses conductivity, the burner never lights and the furnace runs the blower without producing heat. Our contractors test igniter resistance and replace it on the spot when it has failed.
Blowing Cold Air
A furnace that runs but pushes cold or room-temperature air through the vents usually has a burner that is not lighting, a flame sensor that is not detecting the flame, or a limit switch that has tripped from overheating. We test each component in order to find the exact cause.
Constant Cycling
A furnace that turns on and off every few minutes is short cycling, which puts heavy stress on the igniter, gas valve, and control board. The most common causes are a dirty air filter restricting airflow, a failing limit switch, or a heat exchanger that is overheating. Our contractors check all three on every call.
Strange Furnace Noises
Banging on startup usually points to delayed ignition in the burner assembly. Rattling during operation often comes from a loose blower wheel or a worn draft inducer motor. Squealing or grinding signals a blower motor bearing that is wearing out. We identify the source and repair or replace the failed part.
Pilot Light Problems
Older gas furnaces with a standing pilot light can fail when the thermocouple wears out, the pilot orifice clogs, or the gas supply drops. Our contractors clean the pilot assembly, test the thermocouple, and verify gas pressure to get the pilot light burning reliably again.
Why 75 Degree AC Stands Out for Furnace Repair in Houston
When you need furnace repair in Houston, 75 Degree AC brings the right diagnosis to every call.
Furnace-Focused Expertise
Our contractors work on furnace repair calls every day across Houston. Gas furnaces, electric furnaces, condensing units, and older systems are all within our scope. That daily experience means faster, more accurate diagnosis on every job.
Stocked Truck, One Visit
Igniters, flame sensors, capacitors, gas valves, and blower motor parts are carried on every truck. Most furnace repairs are completed in a single visit without needing to order parts and come back a second time.
Clear Repair Pricing
The price is given before any work begins and does not change. There are no diagnostic fees hidden in the final bill and no add-on charges after the quote is accepted. The homeowner knows the full cost before the repair starts.
All Furnace Brands
Our Licensed contractors repair and service residential furnaces from all major manufacturers. No matter which brand is installed in your home, the system can be inspected, diagnosed, and repaired properly.
Request Fast Furnace Repair Today
Give us a call at (713) 598-2737 to get your furnace diagnosed and repaired. Free estimates on every job. Same-day dispatch available across Houston.
Our Step-by-Step Furnace Repair Process
75 Degree AC follows the same diagnostic process on every furnace repair call in Houston, from the first phone call to the final heat check.
Describe the Problem
Give us a call or book online and let us know what the furnace is doing. If it is blowing cold air, making noise, or not turning on at all, that information helps our contractors prepare the right parts before arrival.
Run Full Diagnostics
On arrival, our contractors check voltage, test the igniter, measure gas pressure, inspect the heat exchanger, test the flame sensor, and run a carbon monoxide check. The goal is a complete picture of the system before any repair recommendation.
Lock In the Price
The cause of the failure is explained in plain terms. The full repair price is given before any work starts and does not change. No work begins without the homeowner agreeing to the cost first.
Make the Repair
The failed component is replaced with a part matched to the furnace. Connections are secured, components are tested, and the area is cleaned up. Our contractors use parts that match the system specs, not generic substitutes.
Confirm Full Heat
The furnace runs through a full heating cycle under load. Temperature rise, gas pressure, and airflow are all measured. The system is left running until it reaches the set temperature and the repair is confirmed working before we leave.
Business Hours
Monday
7 AM–9 PM
Tuesday
7 AM–9 PM
Wednesday
7 AM–9 PM
Thursday
7 AM–9 PM
Friday
7 AM–9 PM
Saturday
8 AM–8 PM
Sunday
8 AM–5 PM
What Happens Inside a Furnace During a Heating Cycle
Your furnace starts heating when the thermostat signals the system to turn on. In a gas unit, the igniter lights the burners and the heat exchanger begins warming up. Once enough heat builds inside the system, the blower motor pushes air across the exchanger and through the ductwork. Warm air moves into the living spaces while cooler air is pulled back through the return vents to repeat the cycle. Safety controls monitor temperature, airflow, and ignition so the system can shut down if something is not working correctly.
Electric furnaces follow a different process. Instead of burners, they rely on heating strips that warm up as electricity passes through them. The blower then moves that heated air into the duct system and throughout the home. These systems do not use gas, but they still depend on parts like relays, sequencers, breakers, and the blower assembly to operate properly. When one of those components fails, the furnace may run poorly, stop heating, or shut off before the home reaches the set temperature.
Proudly Serving the Entire City of Houston TX
75 Degree AC provides HVAC services across Houston TX, supporting residential and light commercial properties throughout the city. Our service coverage reflects how HVAC demand actually works in Houston, from central neighborhoods to outer city districts. Customers rely on us for consistent service standards, clear communication, and dependable system support city-wide.
- Westwood
- University Place
- Meyerland
- Eastwood
- Harrisburg / Manchester
- Spring Branch (East Houston)
- Clear Lake (Houston city portion)
Schedule Furnace Repair in Houston Today
When your furnace is not heating the home, every hour without a fix makes the situation worse. Call 75 Degree AC at (713) 598-2737 and get a licensed contractor to your door the same day. We diagnose the problem, give you the price upfront, and complete the repair in one visit.
About Houston, TX
Houston, TX heating season is short, but the cold fronts that sweep through the metro bring overnight lows that expose every weak point in a furnace that sat idle for months. Homes in Sharpstown, Gulfton, and the southwest side of the city often have furnaces that have been in service for well over a decade. When those systems fire up for the first time after a long cooling season, worn igniters, dirty flame sensors, and corroded gas valves are the parts that fail first under sudden demand.
In Aldine, Greenspoint, and the north Houston neighborhoods, older apartment conversions and single-family homes face the same pattern. Furnaces that ran fine the previous winter can develop issues over a humid summer when internal components corrode while the system sits unused. Our contractors at 75 Degree AC see the highest volume of furnace repair calls in Houston during the first cold week of the season, and most of those failures come down to parts that could have been caught with a pre-season inspection.
Frequently Asked Questions FAQ's
What Should I Check Before Calling a Furnace Repair Technician in Houston?
Check the thermostat settings to make sure it is set to heat mode. Check the breaker panel for a tripped breaker. Replace the air filter if it has not been changed recently. These are the most common quick fixes. Anything beyond that should be handled by a licensed contractor.
Can a Furnace That Keeps Shutting Off Be Repaired or Does It Need Replacing?
In most cases, short cycling is caused by a dirty filter, a failing limit switch, or a heat exchanger that is overheating. These are repairable issues. Our contractors test the system to determine the exact cause before recommending repair or replacement.
Why Does My Furnace Make a Loud Banging Sound When It Turns On?
A loud bang on startup usually means delayed ignition. Gas builds up in the combustion chamber before the igniter lights it, causing a small ignition burst. Our contractors clean the burner assembly, check the igniter timing, and test gas pressure to correct the problem.
What Causes a Furnace Igniter to Fail and Can It Be Replaced?
Hot surface igniters wear out over time from repeated heating and cooling cycles. Cracks develop in the element and it loses the ability to reach ignition temperature. Our contractors carry replacement igniters on the truck and can swap one out in a single visit.
Is It Safe to Run a Furnace With a Yellow or Orange Flame?
A yellow or orange flame means the burner is not getting the right air-to-gas mixture, which can produce carbon monoxide. The furnace should be turned off and inspected by a licensed contractor. Our team checks the burner, gas pressure, and flue drafting to find the cause.
How Quickly Can 75 Degree AC Respond to a Furnace Repair Call in Houston?
Same-day service is available for furnace repair calls across the Houston metro. Our contractors carry common parts on the truck, and most repairs are completed in one visit. Emergency and priority scheduling is available for homes without heat.