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glow worm swift flow 80?

Glow worm swift flow 80. The boiler is producing hot water at too high a tempreture. It does not lock out or over heat.
ray smith, February 2008
What is the nylon insert at the end of the cap end please?

David Culverhouse, October 2008
has it always done that? there is a pot on the pcb to set it

otherwise, prolly a faulty temp sensor or the pcb (202186) not modulating properly

geoff@cet, February 2008