A furnace brings together gas, electricity and combustion air, which is why furnace and heating repair in Garland, TX puts safety first. The most important faults are tripped limit switches, cracked heat exchangers, control board faults, blower problems, and failed igniters and flame sensors. To describe what the system is doing, use Call Now and you will be connected with an independent HVAC contractor serving 9 ZIP codes around Garland.
Safety first: gas smell and carbon monoxide
Leave the building if you smell gas, and call the gas utility or emergency services once you are outside. Carbon monoxide detectors belong on every level and near bedrooms, with batteries replaced on schedule. Because a furnace with a cracked heat exchanger can release carbon monoxide, any suspicion of this calls for immediate service.
Repair or replace a furnace
Furnaces last roughly 15 to 20 years with maintenance. A cracked heat exchanger on an older furnace usually points to replacement. Compare efficiency rating, fuel type and expected repairs when deciding.
Common furnace faults
| Symptom | Likely cause | What is checked |
|---|---|---|
| Noisy operation | Blower motor, wheel or loose panels | Motor, bearings and wheel balance |
| No power to the furnace | Tripped breaker, blown fuse, door switch | Electrical supply and safety switches |
| Blower runs constantly | Fan setting, relay or board issue | Thermostat fan, control board |
| Furnace turns off after a short time | Dirty flame sensor, overheating limit, blocked filter | Airflow, sensor and limit switch |
| No heat, clicking at startup | Failed igniter or flame sensor | Igniter resistance, sensor cleanliness, gas valve |
Seasonal furnace maintenance
- Clean the flame sensor and check the igniter
- Have a technician inspect the burners, heat exchanger and flue
- Replace the filter on schedule
- Test the carbon monoxide detectors
- Check the condensate drain on high-efficiency furnaces
How a furnace and heating repair visit works, step by step
Technicians who follow the same steps in the same order find the actual cause, not just the symptom. Knowing those steps lets you distinguish a thorough diagnostic visit from a part swap.
- Interview: what you noticed, when it started, how the system sounds and what you have already tried.
- Visual check: thermostat settings, filter, supply and return registers, the air handler, the condensate line and the outdoor unit.
- Electrical tests: breaker and disconnect, capacitor microfarad rating, contactor contacts, motor amperage and control voltage.
- Airflow and temperature: the temperature drop across the evaporator coil and, where needed, static pressure in the ductwork.
- Refrigerant checks: pressures, superheat and subcooling, and a leak search if the charge is low.
- A written finding: the cause, the repair options and what each one would fix, before any part is replaced.
Questions to ask before approving a repair
- What failed, how did you confirm it and can you show me the part or the reading?
- What are my options: repair now, repair and monitor, or replace?
- Will you give me the findings and the scope in writing before work starts?
- How old is the system and which refrigerant does it use?
- Is this the cause or a symptom of something else, such as low airflow or a leak?
Safety and rules to know
Three hazards share one machine in an air conditioner: high-voltage electricity, pressurized refrigerant and moving parts. Opening electrical panels, bridging contactors and adding refrigerant are not jobs for homeowners, and capacitors can keep a charge after the power is off.
Certification under EPA Section 608 is required in the United States for anyone buying or handling refrigerant, which must be recovered instead of vented. Request the technician's certification and confirm the contractor's licence through Texas Department of Licensing and Regulation (A/C contractor license).
What shapes the written scope
Two AC calls that sound alike can be very different jobs. The written scope should say what the technician found and which of these factors applied.
Have the provider show the diagnostic and the repair as separate items, and list any parts, labor or follow-up that are left out.
- Access to the air handler in the attic or closet and to the outdoor unit
- Whether the fault is an electrical part, an airflow problem, a refrigerant leak or a drainage problem
- Whether the ductwork, return air or thermostat contributes to the problem
- The age, tonnage and refrigerant type of the system
- Warranty status of the parts and whether the equipment is registered with the manufacturer
Mistakes that make AC problems worse
- Ignoring a dirty filter. It is the most common cause of poor airflow and frozen coils.
- Running a frozen system. Ice means airflow or refrigerant is wrong, and running it can damage the compressor.
- Putting off a small repair. A weak capacitor can take out a compressor if left alone.
- Setting the thermostat much lower to cool faster. An AC cools at a steady rate, so it only runs longer.
- Adding refrigerant without finding the leak. The charge will drop again and the leak may grow.
Prepare your Garland home before the technician arrives
- Check that the outdoor disconnect and the breaker are on, but do not open electrical panels
- Replace or check the filter, and clear furniture from the return grille and the air handler
- Set the thermostat to cool and note what it shows and what the house temperature is
- Clear weeds, leaves and debris from around the outdoor unit
- Write down the sounds, smells, leaks or ice you have noticed, and when
What makes furnace and heating repair different in Garland
Dallas County suburb of roughly 250,000 east of Dallas, next to Lake Ray Hubbard and Rowlett. Summers regularly reach the upper 90s and 100s, so AC runs almost continuously from June to September.
Housing from the 1960s to the 1980s often has attic ductwork and older systems, including R-22 era equipment. Clay soil can shift and tilt condenser pads. The diagnosis and the equipment recommendation for your address can both be shaped by these local conditions, so ask the technician how.
Furnace and heating repair across Garland and nearby cities
Air Conditioning Repair Garland covers 9 ZIP codes in Garland, Texas: 75040, 75041, 75042, 75043, 75044, 75045, 75046, 75047, 75049. Calls and requests also reach providers serving Rowlett, Sachse, Richardson, Plano and Wylie. Coverage is confirmed address by address, so give your ZIP code when you call.
Use Call Now at the top of the page, say what the system is doing and how old it is, and you will be connected with an independent HVAC contractor who confirms your address and diagnoses the system in person.
Related help in Garland
If this is not quite your situation, these pages cover the neighboring questions: AC Making Noise: What Each Sound Means; What Size AC Do You Need? Tonnage and Load Calculation; SEER2 Explained for Garland Homeowners; Duct Repair and Sealing. The service area list shows every nearby city and ZIP code covered.
Furnace and Heating Repair in Garland: common questions
Do heat pumps and furnaces use the same ducts?
In many cases, yes; airflow and static pressure can be checked by a technician.
How often should I replace the furnace filter?
Every one to three months, depending on the filter type and the home.
What is a heat exchanger?
It is the metal part that keeps combustion gases apart from the air heating your home, and a crack in it can be dangerous.
Is it safe to use a furnace that smells?
Immediate attention is needed for a smell of gas or burning. Turn the system off and call for service, and if it is gas, leave the building and call the gas utility.
Can I run the furnace without a filter?
No, because a system running without a filter takes in dust, which can damage it.
Why is my furnace not heating?
A dirty flame sensor, a failed igniter, a tripped limit or a thermostat problem are the usual causes, and a technician finds out which one it is.