Walk-in Freezer Repair

A single alarm and a temperature trend are different pieces of evidence. An alarm records that a limit was crossed at a moment; a trend shows whether the box is drifting, recovering slowly after loading, or holding steadily apart from one event. Note both if you have them, with the times. Door history matters as much: how often the box is opened, whether a door was propped during a delivery, and the condition of the seals and door heaters.

Frost and defrost history is the third strand — where the frost is, how quickly it returns after it is cleared, and whether anything changed in the defrost schedule. On installations using a Heatcraft intelliGen iRC controller, the manufacturer's own documentation for that controller is the reference we work from; systems built on a different control platform are read against their own. Please have the box model, the condensing unit and the controller type ready, since guidance is specific to the configuration actually installed.