Hot gas valve coil (042N4212)

The 042N4212 hot gas valve coil (1854701210) is responsible for shifting the hot gas valve on command during harvest. When it starts to fail, it may still ohm “close enough” on the bench but won’t pull in reliably once it heats up. That creates intermittent harvest issues slabs hang, release is delayed, or the machine errors out because it can’t complete harvest (“ice not dropping”). Intermittent actuation that worsens over the day is typical of a coil that’s losing magnetic strength as it heats up in the machine compartment. Watch the machine in real time: when harvest is called, you should see a clean actuation and a predictable warm-up of the evaporator. A coil that buzzes loudly, runs excessively hot, or only actuates when tapped is a strong indicator. Confirm proper supply voltage from the board; if voltage is present and the valve doesn’t shift consistently, the coil is the weak link. Check coil current draw during harvest; abnormal draw can point to shorted turns even when resistance seems acceptable. Replacing the coil restores consistent magnetic pull, so the valve transitions fully every cycle. That means fast, even release and fewer temperature swings that can look like “not cooling” or “no ice” depending on when you check. It also reduces stress on the control logic that may otherwise extend harvest and overheat the system. Hot gas coil 042N4212 (1854701210) replacement should be paired with connector inspection poor contact can also cause buzzing and dropout. After replacement, run multiple harvest cycles back-to-back to prove it’s not heat-related anymore. Consistent slab drop and normal cycle times confirm the harvest circuit is dependable again. After the repair, confirm harvest ends cleanly and the unit returns to freeze without lingering hot gas flow.