Returned to an office building in Rancho Cucamonga to complete approved HVAC repairs. Their #3 Carrier unit needed the reversing valve, two check valves and two LLDs replaced. After completing repairs and recharging the system, our technician cycled the system in heating and cooling, confirmed the system is operational again and space comfortable.
Scheduled a summer air conditioning PM for a retailer in San Bernardino county. Completed all maintenance tasks for basic maintenance, including filter change and system inspection. Found one Trane system that was tripping the breaker. Unable to find any shorts in allotted PM time, will quote for time to return and trace electrical to find the issue.
Quoted AC repairs scheduled for a commercial property in Rancho Cucamonga CA. Two Carrier units were down, one unit needed a refrigerant leak repair and a new compressor contactor, and the other system needed its solenoid coil replaced. The technician completed both repairs, and found that unit #3 has a reversing valve that had stuck in heat mode. Will need to replace the reversing valve, unit is functional but repairs should be completed soon.