Relay Compressor

If you’re sourcing the correct replacement, match part F620057-03 to the relay compressor. Before ordering, compare the removed component to the listing photos and confirm connector style, mounting points, and orientation. As a relay/contactor, this part is used to restore switching in the start/run circuit for a load. Failures in this area often show up as intermittent start, clicking but not starting, and voltage drop. Once the failure is confirmed, replacing the part helps correct the specific fault path and stabilize operation. After installation, run a short test cycle and check for stable operation, leaks, vibration noise, and any recurring fault symptoms. 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. Before replacement, technicians typically verify inputs/outputs (or fitment/movement for mechanical parts) so the root cause is confirmed. Relays/contactors are usually checked for coil continuity, contact wear, and terminal heat marks that can cause voltage drop or chatter. 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.