Furnace & Heating Repair in DFW
When a cold front rolls through North Texas, a broken heater isn't something to put off. We diagnose furnaces, heat pumps, and electric heat strips — and get your home warm again, usually the same day.
The A/C Techs Air & Heat LLC is a family-owned heating repair company serving homeowners across the Dallas-Fort Worth metroplex. We service gas furnaces, electric furnaces, heat pumps, and electric heat strips from every major brand. When the temperature drops, we show up fast, diagnose the real issue, and give you an honest repair-or-replace answer.
Why Is My Furnace Not Heating?
A furnace that runs but doesn't heat — or won't turn on at all — usually points to one of these issues:
- Thermostat — wrong mode, dead batteries, or a failing unit
- Dirty air filter — restricts airflow and trips the high-limit safety
- Dirty flame sensor — the #1 cause of short-cycling on gas furnaces
- Failed igniter — hot-surface igniters typically last 3–7 years
- Tripped breaker or open gas valve — check the panel and the gas shut-off
- Blocked flue or condensate drain — modern high-efficiency furnaces shut down on either fault
Before calling, check the thermostat settings, the air filter, and the breaker. If the furnace still won't run, shut it off at the thermostat and call us — running a furnace with airflow problems can crack a heat exchanger, which is a safety issue and an expensive repair.
What Does Heating Repair Cost in DFW?
Typical furnace and heat pump repair costs in the Dallas-Fort Worth area:
- Flame sensor cleaning or replacement — $85–$250
- Thermostat replacement — $150–$450 (more for smart thermostats)
- Igniter replacement — $150–$350
- Gas valve replacement — $400–$800
- Blower motor replacement — $450–$1,200
- Inducer motor replacement — $350–$900
- Heat exchanger replacement — $1,500–$3,500 (usually not worth it on older units)
- Heat pump compressor — $1,500–$2,500
Our standard diagnostic service call is $85–$150 and is credited toward the repair if you have us do the work. You always get a written estimate before we start.
How Does a Gas Furnace Actually Work?
A modern gas furnace has a simple startup sequence: the thermostat calls for heat → the inducer motor pulls exhaust gases through the heat exchanger → the igniter glows hot → the gas valve opens → burners light → the flame sensor confirms ignition → after about 30 seconds, the blower kicks on and pushes warm air through your ducts. When any of those steps fails, the furnace either shuts down for safety or cycles on and off without heating. Knowing the sequence helps us narrow the fault to the exact component in minutes, not hours.
Need Service Today?
Call for a free estimate or same-day appointment across the DFW metroplex.
How Long Does a Furnace Repair Take?
Most DFW furnace repairs are one-visit, same-day jobs:
- Flame sensor cleaning — 30 minutes
- Igniter or thermostat replacement — 30 minutes to 1 hour
- Gas valve or pressure switch — 1 to 2 hours
- Blower motor or inducer motor — 2 to 4 hours
- Control board — 1 to 2 hours
- Heat exchanger replacement — full day (often a replacement decision)
Is My Furnace a Safety Risk?
Gas furnaces with cracked heat exchangers can leak carbon monoxide into your home. Warning signs include soot around the furnace, a yellow flame instead of blue, rust streaks on the vent pipe, frequent high-limit shutdowns, and unexplained headaches or drowsiness when the heater is running. Install carbon monoxide detectors on every floor and have your furnace inspected annually. If you suspect a CO leak, leave the home and call 911 first — then call us.
Do You Work on Heat Pumps?
Yes. Heat pumps are increasingly common in new DFW construction because they handle both heating and cooling efficiently. We diagnose and repair heat pump compressors, reversing valves, defrost controls, and auxiliary heat strips. A heat pump that runs cold in winter often has a stuck reversing valve, a failed defrost sensor, or low refrigerant — all things we can solve in one visit.
Should I Repair or Replace My Furnace?
Gas furnaces typically last 15–20 years; heat pumps last 10–15 years. Replacement tends to be the better call when:
- The unit is 15+ years old and needs a major repair (heat exchanger, control board, blower)
- The heat exchanger is cracked (safety issue — replace, don't repair)
- Repair costs are more than 50% of replacement cost
- Your home has uneven heating or rising gas bills
If your system has good years left, we'll tell you. And if replacement is the smarter choice, we'll size a new furnace correctly for your home — not upsell you into something oversized.