Systematic troubleshooting using a system check sheet is still the best method for the conscientious service technician to pinpoint hard-to-find system problems. This article explores how evaporators can become oil logged, and includes symptoms with explanations of a system with an oil-logged evaporator.
This low-temperature, R-134a refrigeration unit has a thermostatic expansion valve (TXV) for the metering device and a receiver at the condenser outlet.