Heating Repair in San Antonio, TX — Same-Day Service for Furnaces & Heat Pumps
Locally Owned Since 2016 | Financing Available
Is Your Heater Doing Any of These? You Need Heating Repair
Most heating problems start with a small symptom — and ignoring it usually turns a $200 fix into a $2,000 replacement. If your system is doing any of the following, call us before it gets worse.
Your Furnace Is Blowing Cold Air
The blower runs but the air feels cool or lukewarm. This usually means a failed ignitor, a tripped limit switch, a flame sensor problem, or a low gas supply. Diagnosable in under 30 minutes by a licensed tech.
Your Heater Won't Turn On at All
No clicks, no airflow, nothing. Common causes: bad thermostat, blown fuse, failed control board, tripped pressure switch, or a safety lockout. Don’t reset it more than twice — repeated lockouts can damage the gas valve.
Strange Noises: Banging, Squealing, or Booming
A loud bang on startup often means delayed ignition (dangerous — gas building up before lighting). Squealing usually points to a worn blower motor bearing. Both need a same-day visit, not a wait-and-see.
Your System Cycles On and Off Constantly
Short cycling burns out components fast. It’s typically a dirty flame sensor, a failing limit switch, an oversized system, or a clogged filter. Cheap to diagnose, expensive to ignore.
You Smell Gas, Burning, or Something Electrical
Stop reading and call us — or 911 if the gas smell is strong. Gas leaks and electrical burning smells are not “wait until tomorrow” problems.
Your Energy Bill Suddenly Jumped
A 20%+ increase in winter usually means your system is working harder to compensate for a failing component — heat exchanger crack, dirty coils, refrigerant issue (heat pumps), or a blower motor drawing too much current.
Professional Heating Repair Service Done Right the First Time
Every heating repair from EMAX HVAC starts with an honest diagnosis — not a sales pitch. Our licensed technicians arrive in a fully stocked truck, identify the actual cause of the failure, and explain your options in plain English before any work begins. You see the part, you see the price, and you decide.
What's Included in Every Heating Repair Visit
- Full system diagnostic — combustion safety check, electrical test, airflow inspection, thermostat verification
- Written estimate before any work — no surprise charges, no “while we’re here” upsells
- OEM or quality replacement parts — we stock the most common ignitors, flame sensors, capacitors, and motors on the truck
- Repair completed in one visit when parts are available — most heating repairs in San Antonio finish same-day
- Workmanship warranty on every repair — [DATO PENDIENTE: confirmar duración exacta de garantía de mano de obra]
- Cleanup before we leave — your floors stay as clean as we found them
EMAX HVAC is a licensed Texas heating contractor (TDLR TACLA158965E) providing heating repair in San Antonio and the surrounding premium communities since 2016. We repair gas furnaces, electric furnaces, heat pumps, and ductless mini-split systems from all major brands — Carrier, Trane, Lennox, Goodman, Rheem, Bryant, York, Amana, and American Standard. Same-day diagnosis is available for most San Antonio addresses, and every repair includes a written estimate before work begins. Call 210-920-1412 to schedule a heating repair visit.
Heating Systems We Repair in San Antonio
We’re a true all-brand, all-system heating repair shop. If it heats a home in South Texas, we fix it.
Gas Furnace Repair
The most common heating system in San Antonio. We repair ignitors, flame sensors, gas valves, pressure switches, inducer motors, blower motors, control boards, heat exchangers, and limit switches. Natural gas and propane systems welcome.
Electric Furnace Repair
Electric furnace problems usually trace back to heating elements, sequencers, contactors, or the control board. Common in homes without gas service. Same-day repair on most failures.
Heat Pump Repair (Heating Mode)
A heat pump that won’t heat is a different beast than one that won’t cool. Reversing valves, defrost boards, low refrigerant, frozen outdoor coils, and auxiliary heat strip failures are the usual suspects. We diagnose all of them.
Ductless Mini-Split Heating Repair
Mini-splits fail differently than central systems — communication errors between indoor and outdoor units, drain line issues, sensor faults, and control board failures top the list. We repair Mitsubishi, Daikin, LG, Fujitsu, and other major mini-split brands.
Gas Heater & Wall Heater Repair
Older San Antonio homes often have wall furnaces or gas space heaters. We handle pilot light issues, thermocouples, gas valves, and venting problems on these legacy systems too.
Why San Antonio Homeowners Trust EMAX for Heating Repair
Licensed in Texas Since 2016
EMAX HVAC operates under TDLR license TACLA158965E. Every technician on our trucks is trained to current Texas code on combustion safety, gas line work, and electrical standards. License verifiable on the Texas Department of Licensing and Regulation public registry.
All Major Brands, One Phone Call
You don’t need to find a “Carrier guy” or a “Trane guy” — we repair them all. Carrier, Trane, Lennox, Goodman, Rheem, Bryant, York, Amana, American Standard, plus ductless brands like Mitsubishi, Daikin, LG, and Fujitsu. One call, one truck, one visit
Honest Diagnosis, Written Estimates
We don’t quote repair prices over the phone without seeing the system — and we don’t add charges after the work starts. Every visit ends with a written invoice that matches the estimate you approved.
Bilingual Service — English and Spanish
Hablamos español. Atendemos a familias hispanas en San Antonio sin barreras de idioma.
Heating Repair in San Antonio and Surrounding Premium Communities
EMAX HVAC provides same-day heating repair throughout San Antonio and the most established residential communities in Bexar and Kendall County. Our service area is built around the people who expect a technician to actually show up when promised.
We regularly handle heating repair calls in The Dominion, where we know the gated entry protocols and HOA expectations. In Stone Oak, we cover both the master-planned subdivisions and the surrounding 78258 corridor. Alamo Heights and Terrell Hills homeowners get the same response time as anywhere else in our coverage — older homes with legacy systems are our specialty. Shavano Park and Cordillera Ranch rounds out our premium coverage map, including the larger acreage properties where access matters.
If you’re inside the 410 loop or anywhere in north San Antonio and your heat is out, call us first. If we can’t get to you the same day, we’ll tell you immediately — no padding the schedule.
Heating Repair FAQs — San Antonio Homeowners Ask
How fast can EMAX get to my home for a heating repair?
In most San Antonio addresses, we offer same-day diagnosis if you call before 2 PM. During a hard freeze, response times stretch citywide — we’ll give you an honest ETA when you call, not a fake one.
Do you charge for heating repair diagnostics?
Yes — we charge a flat diagnostic fee that covers the full inspection and written estimate. If you approve the repair, the diagnostic fee is credited toward the work. We don’t do “free estimates” because honest diagnosis takes time and skill, and free quotes usually mean rushed quotes.
My furnace is making a loud bang when it starts. Is it dangerous?
Yes — that bang is usually delayed ignition, meaning gas is accumulating in the burner chamber before lighting. Over time it can crack the heat exchanger (which leaks carbon monoxide) or damage the flue. Stop using the system and call 210-920-1412 today.
Can you repair a furnace that's 15 or 20 years old?
Usually yes. We carry parts for legacy Carrier, Trane, Lennox, and Goodman units back to the early 2000s, and we can source most older parts within 24-48 hours. We’ll always tell you honestly when a repair stops making financial sense versus replacement.
Why is my heat pump blowing cool air in heating mode?
The most common causes are a stuck reversing valve, low refrigerant, a failed defrost board, or auxiliary heat strips that aren’t engaging. All four are diagnosable on a single visit and most are same-day repairs.
Do you repair heating systems on weekends?
We answer calls and dispatch for true heating emergencies on weekends during winter months. Call 210-920-1412 and we’ll tell you immediately what’s available.
What brands of furnaces and heat pumps do you repair in San Antonio?
All major brands: Carrier, Trane, Lennox, Goodman, Rheem, Bryant, York, Amana, American Standard, plus ductless mini-split brands Mitsubishi, Daikin, LG, and Fujitsu. If your system isn’t on this list, call us — we almost certainly still service it.
Will you give me a written estimate before starting heating repair work?
Always. Every EMAX heating repair starts with a written estimate that you sign before any wrench turns. No verbal quotes, no surprise add-ons, no “while we’re here” charges.
Ready for Heating Repair That Actually Shows Up? Call EMAX Today
A cold house isn’t a wait-and-see problem — especially in the rare San Antonio freeze. EMAX HVAC is a licensed, locally owned heating repair company serving San Antonio and the premium communities of The Dominion, Stone Oak, Alamo Heights, Terrell Hills, Shavano Park, and Cordillera Ranch. We diagnose honestly, quote in writing, and finish most repairs in a single visit.