nrod7 Posted September 11, 2015 Share Posted September 11, 2015 The Dixie Narco 368 has power, the fan is running, when I turn the thermostat from 12 o clock (off) clock wise I hear the compressor kick on. I noticed frost on the copper tubing going into the reefer, but the unit did not cool. Could this be a thermostat problem and how can I check to see if it is? nrod7 Link to comment Share on other sites More sharing options...
maestro489 Posted September 11, 2015 Share Posted September 11, 2015 Get an extension cord and plug it into the wall. Then Plug your compressor into the extension cord bypassing the thermostat. If you begin to feel cold air, it's more than likely the thermostat. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
nrod7 Posted September 11, 2015 Author Share Posted September 11, 2015 Gracias Maestro!! Link to comment Share on other sites More sharing options...
AZVendor Posted September 11, 2015 Share Posted September 11, 2015 That means you either aren't giving the machine enough time to cool down (minimum of 1 hour) or you are low on freon. A properly charged and operating machine will have frost on only the top right corner of the evaporator tubing. Where the 1/8" capillary tube changes to a 1/4" tube is where the freon will begin to expand. This is approximately 2" from the top corner of the evaporator. From the point that the 1/8" goes into 1/4" and up to the side of the evaporator is the only place you should have any frost. This called the "frost line." If you have a frost line then let the machine run for an hour or two so it can get down to temperature. Your thermostat should also be set to a setting of 3 1/2 only. Any higher can freeze products and any lower might not be cold enough. Link to comment Share on other sites More sharing options...
nrod7 Posted September 11, 2015 Author Share Posted September 11, 2015 Thanks AZ, nrod7 Link to comment Share on other sites More sharing options...
rmorris1953 Posted September 11, 2015 Share Posted September 11, 2015 On a extremely hot day and in a machine that is hot from the compressor not running may not even see any frost for a bit. Sometimes I will try to feel the high side going into condenser for heat. If it is working the high side should be hot also. Link to comment Share on other sites More sharing options...
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