Toro TMC-212 Starts Unexpectedly at Midnight: Check Extra Start Times

System Runs Correctly at Programmed Time, But Also at Midnight

After 2–3 years of proper operation, the Toro TMC-212 now activates shortly after midnight without a scheduled start time.

Likely Cause: Hidden Start Times in Programs

The controller allows multiple start times per program (1st, 2nd, 3rd, 4th) and multiple programs (A, B, C). An unintended start time may be set in:

• Second, third, or fourth start time slot of the active program.
• Program B or C (often overlooked).

Fix: Clear Unwanted Start Times

1. Review all start times in Program A — ensure only the desired one is set.
2. Check Programs B and C — clear any programmed start times.
3. To clear a start time: hold + and - buttons simultaneously.

Prevention

Periodically audit all programs and start times, especially after power outages or accidental button presses. Label the controller with your intended schedule for quick reference.