Dispatched one of our commercial refrigeration service techs to a customer in Glendale, CA, to inspect their sandwich case that had been previously repaired by the customer. Found the unit cycling off prematurely after customer replaced the temperature control themselves. Inspected the sensing bulb and found ice build up inside the“well” ( where the sensing bulb of temp control reads the evap temp). The “well” has ice inside of the pipe, causing the refrigerator temperature control to shut off prematurely. This was due to necessary putty on end of well missing, allowing moisture into the pipe and freezing. Tech relocated sensing bulb of temp control and monitored operations. Unit was cycled on and off multiple times. Temperatures are now at 38 degrees and box is functional again. Unit is cycling off correctly at 34 degrees, and turning on again at 40 degrees. Job complete.
