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Hotpoint DF42 Dishwasher - E 20?

The dishwasher stops, beeps and displays E 20. Sometimes at the beginning of the wash cycle (even when just doing a prewash cycle) although it will occasionally do a full cycle or stop in the middle of a cycle
Craig Chandler, April 2005
http://www.hotpointservice.co.uk/hs/pages/content.do?keys=FAQ:ERROR_CODES

PM, August 2010
my dishwasher is the same

bigali, June 2009
I have the same problem but have noticed that no-one has answered this. Anyone out there who can help please???/

Rachel Desmond, November 2008
Did you get your Dishwasher fixed, I have the same problem.
I think it is the heater element, any comments?

Regards
Michael

Michael Groves, May 2005
link Click here to see other fixes for Hotpoint DF42.