unit of the temperature
Being this 95 inch prep table has a mechanical temp control, I’m wondering what you mean by “unit” of temperature. Also if your real problem goes deeper than what we are led to believe. Like is the box to warm?  Or did someone add a digital thermometer to keep track of the temp and you want to change it from Fahrenheit to Celsius which is what “unit” means…
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Sandwich/prep tables are notorious for not being able to hold temp due to usage, door gaskets, condenser problems.Â
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I’m going to include a Randell service manual, But I want to caution you that if you have to change the suction pressure control it requires a licensed refrigeration tech. But the troubleshooting section and condenser cleaning is helpful.
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http://www.unifiedbrands.net/media/2582/prep_om_refrigerators.pdf