How did you read the error code 66? This is an unusual fault that does not come up too often. Error 66 is a pressure sensor fault. Service manual says:
The Motor Control module has received signals from the water level sensor (Ptx)
above normal frequency values.
Primary Source: Motor Control module
Action: Replace Motor Control module
So if fault is persistent and keeps coming up then you will need to have the controller replaced.
Lincoln Appliance NZ, June 2009