Whirlpool Dishwasher Error Codes Due to the wide variety of different Whirlpool dishwashers available the error/fault codes will be displayed differently depending on which model you own. If your dishwasher has an LCD display then the fault code will be displayed like below. If your dishwasher just has a row of lights then the fault code will be indicated by the start light flashing several times, waiting for a few seconds then flashing the sequence again. For example if your dishwasher had the fault F7, the start light would flash seven times, pause, then flash seven times again, etc. Fault Code F1 or One Flash Cause: Problem with the NTC (temperature sensor) or thermistor. This fault code will appear if the sensor is reading a temperature outside of the dishwashers operating window (-3°C to +85°C). The most common cause is a faulty NTC. Action: In most cases replacing the NTC will solve the problem. In winter it is possible that the dishwasher has frozen (and thus the NTC isn’t faulty – correctly...