RELAY

Part 12-2090-01 is associated with the Relay and is selected when the original part is no longer serviceable. It’s a relay/contactor replacement and is typically sourced after the failed relay is confirmed. Confirm the unit data tag and the old relay marking so part 12-2090-01 matches the correct revision. In normal operation, this part switches a load circuit so motors and compressors can energize correctly. When this relay/contactor starts to fail, you may see compressor not engaging, clicking but not starting, and burned terminals. Because the relay influences how the unit runs, symptoms may worsen under normal load. A clean repair starts with diagnosis—similar symptoms can come from other parts. Service verification for the relay often includes: confirm the load isn’t over-amping; look for heat discoloration at terminals. After confirmation, replacing the relay with part 12-2090-01 restores the affected function and stabilizes operation. When you’re ready to replace the part, finish with a careful install and test. Order part 12-2090-01, install the relay carefully, and run a full operating cycle test after replacement. Replacing the confirmed failed relay with part 12-2090-01 often resolves the complaint and stabilizes operation. Document the symptom and the post-repair test result for future service history. Keep the removed part nearby for a quick side-by-side comparison during installation. Inspect related components so the new part isn’t exposed to the same stress that damaged the original. Document the symptom and the post-repair test result for future service history. After the first test cycle, recheck hardware and connectors to confirm everything remains secure. Inspect related components so the new part isn’t exposed to the same stress that damaged the original. Inspect related components so the new part isn’t exposed to the same stress that damaged the original.