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problem Vaillant Turbomax Plus 828E error f22?

The boiler works 100% for the radiatoer but once we open a hot water tap it might hold a few minutes or shut off.A error F22 is shown. We had a plumber in that changed the heat exchange and took all the air out, but the problem still persist.
Andre van der Walt, January 2007
hi, did you find out what it was as im having the exact problem with mine.

anais, March 2012
no hot water in the tab.but radoator works 100%

robert, November 2009
ERROR f60 THEN NOTHING hELP !!!

CUSTOMER, February 2009
i had the same fault it was the diverter valve

brian d, January 2008
F22 is No Water in appliance, pump cable defective, pump blocked or defective, pump output too low. this is taken straight from the vaillant manual

JC Plumbing & Heating, February 2007
link Click here to see other fixes for Vaillant.