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Fan won't run

Work outside in: dashboard → relay → contactor → motor.

1. Confirm the dashboard is actually commanding the fan on

Open the bin’s Overview tab. The fan tile shows Auto with the current command — On or Off. If it shows Off, the algorithm has decided conditions are not favorable. This is the right call most of the time. To force a run for testing, set the bin to Manual: On for 15 minutes.

2. Confirm the relay is closing

Listen at Chester X1 when you toggle Manual: On. You should hear a faint click as the relay closes. The dashboard’s Activity tab also logs every relay event with a timestamp.

If you cannot hear the click and the activity log shows no event, file a support ticket — the relay or its driver may have failed.

3. Confirm the contactor is engaging

Listen at the contactor when the relay closes. A standard contactor makes a clear thunk as the coil pulls in. If the relay clicks but the contactor does not, check:

  • Coil wiring continuity through the relay
  • Coil voltage (some installs use 24 VAC, some 120 VAC, some 240 VAC — the relay only switches what the coil sees)
  • Coil itself — coils fail eventually, especially in dusty bin environments

4. Confirm the motor has power

If the contactor pulls in but the motor does not turn, the issue is downstream of GrainLink. Common causes:

  • Motor overload tripped — reset and inspect for binding
  • Phase loss on three-phase service — call your electrician
  • Belt off the fan pulley — visual inspection at the fan

GrainLink only controls the contactor coil. Anything past it is electrical.