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Vaillant Turbomax?

I have no hot water from the taps unless the CH is on. I have read on your site it might be the microswitch or the diverter valve. Any suggestions?
Rob Wilson, June 2008
repair or replace said valves / switches, if you have no knowledge then call a professional to do the job

T, June 2008
link Click here to see other fixes for Vaillant Turbomax.