Relay

Part F620168-20 is a replacement reference for the relay used during service calls. If the machine has multiple production revisions, confirm the unit tag and the original part markings before purchase. If the issue is intermittent, look for heat marks, vibration wear, loose connections, or binding movement that changes under load. Relays/contactors are usually checked for coil continuity, contact wear, and terminal heat marks that can cause voltage drop or chatter. A correct-fit replacement can prevent small issues from turning into bigger failures and helps stabilize machine performance. As a relay/contactor, this part is used to restore switching in the start/run circuit for a load. Symptoms that can point toward this type of part include short cycling, clicking but not starting, and voltage drop. In repairs, replacement is considered when inspection and testing confirm the fault is tied to this component. After installation, run a short test cycle and check for stable operation, leaks, vibration noise, and any recurring fault symptoms. If the part is in a water path, do a leak check during the first run and again after the unit has operated for a short period. Once the failed part is confirmed and replaced, cycle behavior should normalize and performance should return to expected operation. If multiple symptoms overlap, complete the diagnosis before ordering so the replacement targets the true root cause. Inspect surrounding wiring, tubing, and mounting points so the new part is not exposed to the same stress that damaged the old one. After a successful repair, technicians often note the symptom and test result to make future troubleshooting easier. Cleaning the area around the repair helps improve fitment and makes leak or vibration checks more reliable. If multiple symptoms overlap, complete the diagnosis before ordering so the replacement targets the true root cause.