Heat Pump Repair — Bay Area
Heat pumps are more complex than standard AC systems — they reverse refrigerant flow for both heating and cooling. AD Mechanical technicians are trained on ducted split systems, ductless mini-splits, and multi-zone systems from all major manufacturers.
Common Heat Pump Problems We Diagnose and Repair
- System blowing cold air in heat mode (reversing valve failure)
- Not heating or cooling — no temperature change at all
- Outdoor unit icing up (not defrost cycle — actual fault)
- Mini-split error codes — E1, E3, F1, and other fault codes
- Refrigerant leak causing loss of capacity
- Compressor not starting or tripping breaker
- Loud noise from indoor or outdoor unit
- Water dripping from mini-split indoor head
- One zone not working in a multi-zone system
- Communication errors between indoor and outdoor units
Mini-Split Repair Specialists
Mini-split systems require brand-specific diagnostic tools and knowledge of proprietary communication protocols. We work on Mitsubishi, Daikin, Fujitsu, LG, Samsung, Gree, Carrier, and other major brands. When a mini-split throws an error code, we have the tools and training to read it properly.
Repair vs. Replacement for Heat Pumps
Heat pumps typically last 15–20 years with good maintenance. Compressor failure on a system under 10 years old is often worth repairing under warranty. On systems over 12 years old with compressor or multiple component failure, replacement may be more cost-effective — especially with current rebate programs offsetting $2,000–$4,000 of the cost. We give you both numbers honestly.
San Jose, Santa Clara, Sunnyvale, Mountain View, Palo Alto, Redwood City, San Mateo, Burlingame, Millbrae, San Bruno, South San Francisco, Daly City, San Francisco, and nearby Bay Area cities