dhw flow switch

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how would i test to see if my hot water flow switch was working or not
and how would i know if it is the micro witch was the fault thankyou

 

[ChrisR]

Puma? Red led on pcb comes on.

 

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yes stays on when when i tuen hot tap off

 

[ChrisR]

Strip the switch down to try cleaning/lubricating it, or replace it. I can sell you one for a bit less than "trade" price. Point your mouse to my name on the thread list page to see my email addr.