Salus RT300 RF Digital thermostat.
Bought as a replacement for a 20 year old one which was starting to go intermittently faulty, due to a previous owner allowing the batteries to leak, causing a poor connection due to corrosion starting on the terminals and probably inside the unit.
The new one was an instant cure and worked out of the box once the batteries were fitted, and the old units batteries removed.
The only thing to check is that the jumper settings to correspond to the old unit.
This is explained in the manual, or available online.
The full kit comprises two items, the thermostat itself (transmitter) and the receiver which connects to the boiler.
I didn't have to change the new receiver, and it's a later (smaller) type. So they are obviously interchangeable.
To use the new receiver needs a plumber to connect and set up.
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