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Re: worcester bosch heatslave 20/25 model lockout light is on, i have checked oil and water pressure and both are ok. tried to reset but locks out again after a few minutes.

Posted by polldoll on

  • Anonymous Sep 26, 2008

    went away on hols for a week so turned the program off but left power to the boiler, got back put the programmer on and after 2-3 mins it locked out, reset it a few times with no joy, called local plumber out, he didnt really know what was wrong but noticed that when he took the top off there may have been a long term weeping affecting a circuit board? he said it may be expensive (always is) has anyone else had to have this circuit board replaced??



1 Answer


Air in Oil line, Blead air out.

Posted on Aug 25, 2008


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