Commercial Fridge and Walk-in Cold Room

*Check room temperature and gas charge

*Check oil stains for any potential gas leaking

*Check and clean evaporator coil, condensing coil if necessary

*Check drain and unblock if necessary

*Check fan motors, compressor operating conditions

*Check isolator switch and electrical connections

*Check evaporative condensation drip tray operating

*Check and tighten refrigerant valves

*Check digital thermostat settings and defrost heater operating