Relay

If you’re sourcing the correct replacement, match part F620057-55 to the relay. Keeping the removed part for comparison until testing is complete can help avoid installation surprises. As a relay/contactor, this part is used to restore switching in the start/run circuit for a load. Common complaints tied to this category include clicking but not starting, voltage drop, and compressor not engaging. Technicians often replace this component after confirming clicking but not starting, short cycling, or inconsistent engagement. 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. Replacing the correct component helps restore predictable operation and reduces repeat service calls when the diagnosis is accurate. 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. After installation, run a short test cycle and check for stable operation, leaks, vibration noise, and any recurring fault symptoms. 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.