Found Reach-In Cooler evaporator frozen solid, Customer is going to thaw for a return trip on Monday. 3/01/21 Found electronic cold control turned almost all the way up. Evaporator was a block of ice although the customer turned it off when I was in the way. Removed front and back evap covers and melted the ice. Blew out drain line with Co2 cartridge. Replaced the evap covers, Vacuumed all the water and dried the bottom, then turned on unit. Set cold control to cut out at 34° and it was cutting in at 39°. Observed it cycle 2 times before leaving. Unit is running good at this time. Manager said he was using the dial in the machine to monitor temp but dial is bad and needs to be replaced as it’s sticking. Will need to order a dial and return. Picture of dial stat is attached in file room. 3/04/21 Replaced thermometer dial and customer stated that unit is still getting to cold, Unit is temping at 23 degrees with thermostat at lowest setting, Probes and thermostat should be replaced, custo