I have a Digistat3 room thermostat, it is not connected to the central
heating but used as a stand alone thermometer just because it can :-)
it has worked ok for a few years but recently stuck at temp 34C.
Batteries are new and I have tried sticking it in the fridge but still
registers at 34C.
Not an issue if I have to bin it but is there anything to try before I
do that?