Repairs · Gaithersburg, MD
HVAC Repair in Gaithersburg
Compare licensed HVAC repair pros in Gaithersburg, MD. Typical repair tickets run $776–$7,906.
8 pros rankedLicense-verifiedWritten estimates
On this page
Common HVAC repairs in Gaithersburg
- 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 →- Parker Pearce Service ExpertsTop pick
What customers say “From start to finish, it was an outstanding experience. Sebastian, Tim, AD, and Lanee each brought something special to…”
What customers say “My wife and I have been customers of B&B since the 1980s. We have always been very happy with the service that has…”
- Metro Services HVACTop ratedinstallationrepairemergency
What customers say “About 5 years ago, our downstairs HVAC system died, so we requested quotes from three different companies to replace…”
What customers say “Christy scheduled my appt. and conveyed my needs clearly. She was attentive and timely. I had an appt. scheduled…”
- United Service SpecialistsTop ratedinstallationrepairemergency
What customers say “United service specialists is consistently responsive, knowledgeable, and professional in addressing our heating and…”
What customers say “Vick and his team at Sichinava Heating and Air Conditioning are phenomenal! Over the last 10 years, we've had a number…”
- installationrepairinspection
What customers say “I have been a delighted Mannix customer for years. They are expert, knowledgeable, prompt and neat. Today, Silvio the…”
- P&Y Heating and CoolingTop rated
What customers say “Absolutely outstanding service. Our heat went out during extremely cold weather with 30+ mph winds in the DC/Maryland…”
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
Gaithersburg repair range$776 – $7,906per repair visit
Derived from local HVAC benchmarks in Gaithersburg. 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 Gaithersburg 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 Gaithersburg?
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.
Licensing verified weekly. Reviews refreshed within the last 30 days.
Licensing data: Maryland Department of Labor — Board of Heating, Ventilation, Air-Conditioning, and Refrigeration Contractors (HVACR Board) · Company data: verified business records + Google Business profile
See our editorial standardsReport inaccurate info about HVAC repair in Gaithersburg
Get Gaithersburg repair quotes
Two or three written quotes is the fastest way to normalize a repair bill — we'll connect you with top-ranked local pros.