RELAY

Part 18-1903-52 is a relay used in commercial ice equipment and related refrigeration assemblies. Technicians often source this part after verifying the installed component is cracked, out of tolerance, heat-damaged, seized, or otherwise unreliable. Always verify the brand family and machine series used on the service call so the replacement matches correctly. Where model references are available, cross-check the service model and revision level because similar machines can use different parts. Helps the circuit start and switch loads correctly when the machine is not starting, clicking, or short cycling. Depending on the machine setup, failures in this part category can show up as clicking but not starting, hard starts, and compressor not engaging. Relay or contactor faults can interrupt startup and cycling, especially when contacts are worn or the coil becomes unreliable. For this relay/contactor category, the typical repair goal is to restore the function that the failed component was affecting. During diagnosis, the part number should be matched first, then the circuit or assembly should be tested to confirm the failure path. When replacing a relay or contactor, inspect the socket/terminals and confirm coil/control voltage conditions to prevent repeat failures. If the machine has a history of intermittent faults, reviewing recent service notes can help confirm whether this component is the primary failure. Replacing a failed component with the correct part number helps restore normal operation, reduces repeat callbacks, and supports more reliable troubleshooting outcomes. For ordering, match the part number exactly and compare the removed component to the replacement before installation. That step matters on commercial ice equipment because similar-looking parts can have different ratings, connectors, or mounting details. If you are troubleshooting symptoms such as not turning on, no power, not cooling, not starting, intermittent operation, error code behavior, or ice not dropping, confirming the failed component first will make this replacement more effective.