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How do I fix F75 problem on vaillant ecotec 618 R1?

How do I fix F75 problem on vaillant ecotec 618 R1
Tricia, February 2012
f75 normally means low pressure check presure and refill 2 1bar wen cold if ur pressure is ok then u prob got a faulty pressure sensor or even some crap in sensor

blaiross, February 2012
Turn the mains power off to your boiler for 5 minutes to let the pcb fully discharge all it 'stored power' then turn back on.

bill, February 2012
link Click here to see other fixes for Vaillant.