Repairs · Ofallon, MO
HVAC Repair in Ofallon
Compare licensed HVAC repair pros in Ofallon, MO. Typical repair tickets run $608–$6,188.
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Common HVAC repairs in Ofallon
- 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 →- installationrepairinspectionemergency
What customers say “The quote experience: The comfort specialist (sales and research) who came through and inspected a 900 sq ft condo.…”
- installationrepairinspection
What customers say “Another really good experience with a technician at Jerry Kelly. Jessica was fantastic with her electrical help with…”
- Budget Heating, Cooling & PlumbingTop ratedinstallationrepairemergency
What customers say “The techs that come out initially were very professional and personable. On the day of my system install the employers…”
- B & B Heating & CoolingTop rated
What customers say “10 out of 5 Stars! Justin Popp from B&B Heating & Cooling was absolutely fantastic. He came out this morning and had…”
- Hoff Heating & ACTop rated
What customers say “Honestly, we were about to go with another company, mainly because of the longer parts and labor warranty. But…”
- Stay Cool Climate ControlTop rated
What customers say “Called 3 companies early in the morning. Stay Cool was able for me to take pics of the area while other companies…”
- No Problem Heating and CoolingTop rated
What customers say “NPM was assigned to us by our home warranty company. I submitted a request and the office staff called first thing the…”
- Faszold Heating and CoolingTop ratedinstallationrepairemergency
What customers say “I recently had a new HVAC system installed and had a fantastic experience from the initial consultation through the…”
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
Ofallon repair range$608 – $6,188per repair visit
Derived from local HVAC benchmarks in Ofallon. 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 Ofallon 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 Ofallon?
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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