"RJ" wrote in message
om...
Not "that" red thing - I know that!

The thing in top-left corner on the top of the cylinder. It has an
electrical connector to it and I can't work it out. Its on the end of
a T for the boiler in/return.

Pandora is looking more & more likely. Any other alternatives worth
checking out?

Look at the Range cylinders thermal store. They may have one that is
readily in stock.


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