Checked refrigerator customer is hearing the refrigerant going threw the lines explained to customer the normal operating sounds of the newer refrigerators he was comparing his refrigerator in his kitchen which is a R600 system to his refrigerator out in the garage which is a R134 system customer does have a quiet home with cathedral ceiling so noises will be more dominant.I did show customer Whirlpool Manuel explaining normal operating sounds and gurgling was one of the noises that the unit makes from the R600 going threw the system

Unit had a faulty breaker unit checks out ok

Installed new heater thermostat cover and filter housing unit checks out ok

Installed new fresh food door and badge unit checks out ok

Picked up data loggers installed new icemaker unit still had the water hammer sound backed off water pressure to refrigerator due to customer having high water pressure in their home tested water dispensing it checks good getting 4 oz of water to icemaker and also calibrated the measure fill option unit checks out ok