In article ,
Andy Burns wrote:
Dave Plowman wrote:

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You wot?

No idea at all. Blame it on BT. I do.

This is the post from my log:-

In article ,
Jethro_uk wrote:
On Wed, 22 May 2019 11:03:17 +0100, Dave Plowman (News) wrote:

There are two wires from it.

Sounds exactly like the arrangement I described upthread. A current is
pushed down the wires to the heating element and as long as the circuit
stays closed you have oil.

Could well be. On a working one, the warning light flashes for a few
seconds before giving a reading. Could be while it heats up.

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Dave Plowman London SW
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Dave Plowman London SW
To e-mail, change noise into sound.