You could use something like this
https://www.powersaver.co.uk/product/knight-grade-3-alarm-junction-box-20-terminals-with-end-back-knock-outs-and-spring-tamper-available-in-white-only/
Who was the email from Start by changing the password on your Vodafone account. Use a different password for each site, and enable mfa if the site supports it.
Looks to me like it could be a TRV with a integrated balancing insert, such as a Honeywell Valencia. If that black part in the centre has a hex head, and numbers on it, try undoing it slowly. You should find that the pin travel increases.
It looks like the heat is coming from what are most probably two diodes that are disappearing under that white plastic cover, (Photo of another BDR91 without cover for reference.)
No. The pin drops down under gravity when internal and external pressures are the same. It is forced up as the cooker warms up by the flow of steam through the hole, and then the increase in internal pressure ensures a good seal.