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Common HVAC repairs in Chicago
- 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 “ I spoke with several HVAC companies before choosing Four Seasons, and the difference was clear. Some proposals…”
- Deljo Heating, Cooling & PlumbingTop ratedinstallationrepairemergency
What customers say “Deljo was professional, communicative, and a pleasure to work with from start to finish. I needed my entire HVAC system…”
- Shavitz Heating and Air ConditioningTop rated
What customers say “This was initially a presumed thermostat repair. After a thorough inspection, we found that a heater repair done a…”
What customers say “Alltemp was fantastic from start to finish. My furnace went out, and they scheduled my appointment for a time that was…”
- Besco Air Inc.Top rated
What customers say “Besco recently installed a new furnace and AC for my unit and the process could not have been smoother; I called Besco…”
- Guardian Heating & Cooling ServiceTop rated
What customers say “How could I not choose Guardian. I have been a customer for over 40 years and have always had great service from the…”
- Oasis Plumbing, Heating & CoolingTop ratedinstallationrepairemergency
What customers say “I will never call another service. Everything about Oasis is 5 stars. When I called them just to get information about…”
- Chicago Comfort HVAC ServicesTop rated
What customers say “Jon and his team did an outstanding job installing our American Standard HVAC system. From start to finish, he was…”
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
Derived from local HVAC benchmarks in Chicago. 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 Chicago 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 Chicago?
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: Illinois Department of Financial and Professional Regulation (state business registration) plus municipal HVAC licensing (e.g. City of Chicago Department of Buildings) · Company data: verified business records + Google Business profile
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