Repairs · St Louis, MO
HVAC Repair in St Louis
Compare licensed HVAC repair pros in St Louis, MO. Typical repair tickets run $656–$6,683.
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Common HVAC repairs in St Louis
- Heat pump not cooling on humid summer days — low refrigerant, frozen coil, or failing capacitor.
- Furnace short-cycling in winter — dirty flame sensor, oversized equipment, or thermostat miscalibration.
- AC blowing warm air — condenser-fan failure, tripped high-pressure switch, or refrigerant leak.
- Uneven temperatures room-to-room — failing zone damper, duct leakage, or blower-motor issue.
- Loud banging, squealing, or grinding from the air handler — bearings, belt, or blower-wheel imbalance.
- Thermostat shows the right setpoint but the system won't start — control board, transformer, or wiring fault.
- Water pooling at the air handler — clogged condensate drain or cracked pan.
- Frozen evaporator coil that keeps icing over — airflow restriction or low charge.
Ranked shortlist
Request quotes →- installationrepairemergency
What customers say “Kevin came out first to help with the home humidifier and the furnace He was very knowledgeable and answered all my…”
- Seliga Heating and CoolingTop rated
What customers say “I currently have Home Warranty and they sent a tech (not Seliga) out to check on my furnace. I was getting heat…”
- Rhymes Heating & CoolingTop rated
What customers say “Everyone at Rhymes HVAC was wonderful. Steve the salesperson knew his products very well. We initially decided to go…”
What customers say “I had a heating system problem. The tech came over on Friday to fix it. He said it would be warm in a few hours. I've…”
What customers say “⭐️⭐️⭐️⭐️⭐️ If I could give 10 stars, I absolutely would. Last night our furnace went out unexpectedly, and with three…”
- Vogel Heating & CoolingTop rated
What customers say “We called Vogel for a squealing AC. Clay met us at our house that afternoon! He was very personable and professional.…”
- SmartHouse Heating and CoolingTop rated
What customers say “I had paper wasps set up a nest right behind the exhaust vent cover for my basement furnace. I called my Pest Control…”
- Matheny Heating & CoolingTop rated
What customers say “Outstanding Work by Jacob and the Matheny Heating & Cooling Team! I couldn’t be happier with the job Jacob and his…”
Repair vs replace: quick decision tree
- Age > 15 years — Expect diminishing returns on any single repair. Start pricing replacement in parallel, especially if a second failure in the last 24 months.
- Repair cost > 50% of replacement — A $2,500 repair on an $8,000 system rarely pencils. Run the 5-year math: repair cost + likely follow-on failures vs new-system financing.
- Uses obsolete refrigerant (R-22) — R-22 is phased out; refills are both expensive and short-lived. Replacement is almost always the right call.
- Failed a major component (compressor, heat exchanger) — These are “the system”. A compressor on a 12-year-old condenser is a replacement signal, not a repair.
Typical repair cost range
St Louis repair range$656 – $6,683per repair visit
Derived from local HVAC benchmarks in St Louis. Most repair tickets fall well below full-system pricing — expect simple swaps (capacitor, ignitor, thermostat) at the low end and major component replacements (blower motor, control board, compressor) at the high end.
Estimate your St Louis repair
Pick the repair type and your system's age for a ballpark range. Real quotes vary by part availability and diagnosis — use this as a sanity check before approving work.
Frequently Asked Questions
How long does a typical HVAC repair take in St Louis?
Most diagnoses take 30–60 minutes on site. Small repairs (capacitor swap, thermostat, ignitor) finish the same visit. Parts-on-order repairs can push the job 1–5 business days depending on supplier stock.
Do repairs come with a warranty?
Labor warranties of 30–90 days are common; parts usually carry the manufacturer's warranty (1–10 years). Always get the warranty terms in writing on the invoice before the tech leaves.
How do I avoid common repair scams?
Red flags: no written estimate before work starts, refrigerant refill with no leak search, blanket recommendation to replace without an inspection, or very high "after-hours" pricing on a non-emergency call. Two written quotes for any repair over $600 is the fastest sanity check.
When should I replace instead of repair?
When the repair estimate exceeds 50% of a new system, or the unit is past 15 years, or it uses obsolete refrigerant (R-22), replacement usually wins the 5-year math. Otherwise repair is almost always the better call.
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Licensing data: Municipal licensing — no statewide Missouri HVAC license (each city regulates mechanical trades independently) · Company data: verified business records + Google Business profile
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