A fogged case stops selling long before it stops cooling. In monsoon season that happens to grocers and delis across the Valley, and it is usually fixable in one visit.
A display case is the only refrigeration in the building that has to be looked at. Everything else can be ugly as long as it is cold. This one is merchandising, so a case that fogs is losing you money at full temperature, and customers will walk past a sweating deli window without ever knowing why. Phoenix makes that specific problem seasonal: for most of the year the air is dry enough that condensation is not an issue, then monsoon arrives and every marginal anti-sweat heater and tired door seal in the Valley shows up at once.
Usually yes, but only mildly. Anti-sweat heaters and door seals that are marginal will cope fine in dry Phoenix air for nine months and then fail visibly the week monsoon humidity arrives. The case is telling you about a fault that was already there. It is normally a heater or a seal rather than anything on the refrigeration side.
Nearly always airflow instead. On an open-air merchandiser the cold is held in by an air curtain, and product stacked above the load line breaks it, so the top shelf sits in room air. Before booking a repair, check nothing is over the fill line. If it is clear and still warm, that is a fan or evaporator issue and worth a call.
Fast commercial display case and merchandiser repair across Phoenix.
