Naboo - How do you solve the error message “A09 washing temperature alarm”?

A09 Washing alarm warns that cabinet temperature exceeded max temperature (during washing. The appliance will stop the washing; switch off and let cool down the unit. 

This message requires the intervention of an authorized technician; causes of the fault must be investigated as per prescriptions.

Description

The cabinet probe SC, during washing, detect a temperature over the maximum allowed 120°C/248°F.

Reset

Message cannot be confirmed; switch off the unit to cool down.

Checks

Perform following checks: 
- Check contact of contactors C2 and C3 or SSR stay open when unit is in standby. If they stay closed change contactor. 
- Check if fan wheel really spins. 
- Check water supply, S1 and humidification pipe - Check probe SC and PCB.