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I have a Frigidaire comercial upright freezer mod#ffu21c4cwo it’s runs but won’t get cold thermostat seems to work can’t get to coils sealed inside I guess I can’t find a fan the compressor runs the second shelf down from top gets frost on it about 8" on back shelf rail only there is a thin metal line that connects there I think it’s a defrost line also can’t find a defrost timer behind or underneath anybody have any ideas what I should do next very frustrating.
Hi @reo3 , There is no defrost thermostat or fan in the freezer. The temperature control thermostat regulates the temperature. (supplier example only) . Here’s the wiring diagram for the freezer that may help. If the thermostat is OK (- see cut in / cut out temps - if faulty search for 297216004 to get results for suppliers that suit you best) then the suction and high pressure values of the refrigerant in the sealed system would need to be checked to see if they’re OK, in case of a leak, blockage or faulty compressor etc You may need a licensed repairer to do this.
