Well, if the unit has a "call for heat" indicator on its display and this is illuminated/present when you insert the batteries, no matter how you manipulate the controls, that's a fairly conclusive test that it's shot.
Tried new batteries. When I put them in yesterday morning the boiler went on even though the temp dial was at 5! Do I need to order just the transmitter or receiver as well? Thanks for all the advice.
Do I need to order the receiver as well as the transmitter? Screwfix sell both together but if I just need the transmitter then I’ll have to order it online.
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