Trane Furnace Repair in St. Louis, MO
Expert Trane furnace diagnostics and repair from a locally owned St. Louis HVAC company — honest answers, no upsell.
If your Trane furnace isn't heating properly — or isn't turning on at all — Thomas Hoffmann Air Conditioning & Heating is ready to help. We are a locally owned St. Louis HVAC company with hands-on experience in furnace repair and Trane heating systems. Whether you're dealing with a fault code, a cracked heat exchanger concern, or a furnace that simply won't fire, our technicians will diagnose the problem accurately and give you honest repair options.
Call (314) 471-7625 to schedule Trane furnace repair in St. Louis. We serve the St. Louis metro including Chesterfield, Ballwin, Kirkwood, Webster Groves, Des Peres, and surrounding areas.
30+ Years
Experience
Master Technician
Locally Owned & Operated
24/7
Emergency Service
Common Trane Furnace Problems We Repair
Trane furnaces are built for reliability, but St. Louis winters put real demands on any heating system. These are the most common Trane furnace issues we diagnose and repair:
- Furnace not turning on — Often caused by a failed ignitor, pressure switch, or control board.
- Furnace blowing cold air — Can indicate a failed flame sensor, gas supply issue, or overheating due to restricted airflow.
- Trane fault codes — Trane furnaces use LED flash codes to indicate specific problems. We read, interpret, and resolve the underlying issue — not just reset the code.
- Short cycling — If your furnace runs briefly and shuts off repeatedly, it could be overheating, have a faulty flame sensor, or a heat exchanger problem.
- No heat or weak heat — Low gas pressure, a dirty burner, or a failing heat exchanger can all reduce heating output.
- Loud noises — Banging, rattling, or squealing during operation often points to blower motor issues, loose panels, or delayed ignition.
- Limit switch tripping — Usually a sign of restricted airflow or a dirty filter. We find the cause and fix it properly.
Trane Furnace Fault Codes — What They Mean
Most Trane gas furnaces communicate problems through LED blink codes on the control board. Common Trane fault codes point to issues like pressure switch failures, limit switch trips, ignition failures, and inducer motor issues. If your Trane furnace is displaying a fault code and you are not sure what it means, call us — we can walk through it on the phone or send a technician out.
Repair or Replace Your Trane Furnace?
Trane builds furnaces that can last 20 years with proper maintenance. If your system is relatively young and the repair is straightforward, fixing it is almost always the right call. If your Trane furnace is older or facing a major repair like a cracked heat exchanger, we will give you a clear comparison — including what furnace replacement would cost and what a new Trane installation involves.
If your air conditioning system also needs attention, see our Trane AC repair and AC repair St. Louis pages.
Frequently Asked Questions — Trane Furnace Repair St. Louis
We service all current and recent Trane gas furnace models including the XC95m, XC80, S9X2, S8X1, and older XB and XT series units. Not sure if we service your model? Just call and we will confirm.
Trane furnaces use a blinking LED on the control board to communicate fault codes. Count the blinks in a sequence — 3 blinks followed by a pause typically indicates a pressure switch fault. Your furnace door panel usually has a code chart. If you can't locate it or are unsure what it means, call us and we can walk you through it.
It depends on the noise. A loud bang at startup can indicate delayed ignition, which should be addressed promptly. Rattling or vibrating sounds are often minor. A persistent metallic scraping sound usually means a blower wheel or motor issue. When in doubt, it is always safer to have a technician look before running the furnace further.
Repair costs depend on the specific problem and parts required. Simple fixes like ignitor replacement or flame sensor cleaning are generally affordable. More involved repairs involving control boards or heat exchangers cost more. We always provide a written estimate before beginning any work.
Contact Thomas Hoffmann Air Conditioning & Heating
Thomas Hoffmann Air Conditioning & Heating is a full-service residential heating and air conditioning company in St. Louis. With over 30 years of experience and a master technician and mechanical engineer as our owner, we can replace, repair, and maintain your home's HVAC system.
24/7 Service Call Now
At Thomas Hoffmann Air Conditioning & Heating, we pride ourselves on being a locally owned and operated HVAC company. With more than 30 years of experience and a master technician and mechanical engineer as our owner, we can replace, repair, and maintain your business or home’s HVAC system.