The controller has been playing up in the last six months ie not turning
off at preset times also at times the room thermastat gets ignored in that
radiators get hotter and hotter. Temp solution was to turn controller off
Thought problem was that controller was faulty so switched electrics off and
took controller off back plate in order to purchase new one.
Then switched electric on again and system can on ie heating and hot water.
Is this normal or point to a fault in wiring.
Did not buy new controller