Commercial Refrigeration Evaporator Coil Freezing Up

Unplug the defrost heater and thermostat.

Commercial refrigeration evaporator coil freezing up.

Even the top notch and most durable refrigeration brands may need. Each evaporator has a defrost cycle to melt frost ice that has built up on the evaporator coils. Because of cooling a larger space and running at a lower temperature commercial units may suffer more wear and tear and may break down more often than the refrigerator you have at home. Turn off the refrigerator and take the back wall out the freezer.

If you are not satisfying the thermostat with a 7 deg f coil you have too small a coil for the duty you. Some liquid refrigerant may travel past the evaporator coil through the suction line and eventually get to the compressor. You don t have to wait until the refrigerator stops cooling just a few days. If this is a top fed evaporator then an ice build up from the bottom is indicative of insufficient off cycle time to defrost the coil.

You may notice that only a part of the evaporator coil is freezing up which could indicate you have a low charge so the pressures and sub cooling may need to be checked either by you or a certified technician. Blocked air ducts in the event that you ve manually shut many of your home s floor or ceiling registers the return air flow to the coil may not be getting sufficient airflow to continue operating correctly. Commercial refrigeration evaporators condensers and coils maintain your kitchen equipment with commercial refrigeration coils condensers and evaporators if your commercial refrigerator or freezer isn t keeping its contents cool it may need replacement coils or a new evaporator and condenser. Low airflow and less heat load across the evaporator coil can cause much of the refrigerant in the coil to remain a liquid and not vaporize as fast.

Moisture from the air freezes onto the evaporator coils the cooling coils in the freezer and forms an insulating barrier to heat transfer. The film factor is a relationship between the medium giving up heat and the heat exchange surfaces. Commercial refrigerators are often larger run at a cooler temperature and may have many more sections than a standard home refrigerator. Evaporator coil cleaning is an essential part of our ac tune up service for this exact reason.

Using your ohmmeter test for continuity across the heater and the thermostat.