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Common HVAC repairs in Pasadena
- 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 →What customers say “This was our second appointment with Air Tech for our Spring checkup. From the beginning to the end, our experience was…”
- Champion and NashTop rated
What customers say “Great experience with Enzo from Champion and Nash. After a competitor failed to diagnose any issue, Enzo quickly…”
- Doctor Cool & Professor HeatTop rated
What customers say “Dr. Cool Professor Heat has been doing our AC & Heating work for us for out 20 years. The owner of Dr. Cool professor…”
- Brown Air Conditioning & HeatingTop rated
What customers say “Brown Air & Heat has completely earned my trust. After I submitted a claim through my home warranty, they reached out…”
- installationrepairinspection
What customers say “Moving appliances around about to put new ones in. Blew a circuit, thought it would be routine in and out. Ended up…”
What customers say “I recently had to replace a 20-year-old AC unit in my condo, and Cosmic Air Condition and Heating LLC came highly…”
- Valderrama A/C & RefrigerationTop rated
What customers say “Valderama AC stands out because of its unwavering commitment to quality, performance, and customer satisfaction. Known…”
- Texcellent Heating & Cooling LLCTop rated
What customers say “I was getting coffee at Sycamore Grounds Coffee and was surprised by the generosity and kindness of the owner of…”
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 Pasadena. 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 Pasadena 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 Pasadena?
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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