M9/M11 Sterilizer Fan System Location / Function Test and Repair
The fan may run continuously when running consecutive cycles.
During all Modes
When power is supplied to the main PC board, line voltage continuously flows to the fan thermostat.
The fan thermostat controls the ON/OFF function of the fan. When the temperature (at the thermostat) is below 130°F (54°C), the fan thermostat contacts are open (no current to the fan is OFF). When the temperature reaches 130°F (54°C), the fan thermostat contacts close (current flows to the fan is ON).
When the temperature drops to approximately 100°F (38°C), the contacts of the fan thermostat open and the fan stops running.
