Walk-In Freezer Repair in Boynton Beach: Evaporator Icing and Defrost Timer Replacement

The kitchen at a senior-living facility in Boynton Beach reported that its commercial walk-in freezer kept building frost and ice on the evaporator and was warming up. The service notes also recorded a warm, humid kitchen and frequent door openings during the day. Those operating conditions were noted as part of the service call; they were not established as the sole cause of the icing.

• Heavy frost and ice had built up on the evaporator coil, visibly obscuring the coil.
• Frost was also present on the evaporator tubing near the existing expansion valve, which was inspected as part of the visit.
• The existing defrost timer was an Intermatic DTAV40-series assembly.

• Ran a defrost to clear the observed ice buildup; the coil fins were visibly cleared during service.
• Replaced the defrost timer with a new timer of the same model (Intermatic DTAV40 series).
• Adjusted the defrost schedule on the new timer.
• Took temperature checks at the evaporator while the freezer was pulling back down after defrost.

After the icing problem was corrected, further troubleshooting identified a defrost thermostat that was not working and remained stuck open. A ShieldVault installation is planned as part of the follow-up control work. The thermostat issue and final operating result remain open items until that work is completed and verified.