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worcester bosch 35cdi?

not working heating side comes on normally in morning and evenig no demand for it put it constant still does not fire up however fault indicated u9 which is not listed in manuel any one come across this fault and what is it

gabber
January 2008
Worcester BoschWorcester Bosch 35CDiHeating, Home Heating SystemsBosch Worcester Fault
you have an overheat problem. the 'u' means 100 so display is showing 109 oC. possible no external by-pass on system. consult instaler.

andy
March 2008
What does the fault code EA mean? I keep re-setting it and it's fine for two minutes before cutting out totally.

Nicholas Sudbury
February 2008

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Worcester Bosch 35CDi - U9 Fault & No Heat