Active job

Devireg 550 underfloor heating control - timer

We have a devireg 550 underfloor heating system in our kitchen, entranceway, 2x bathrooms and 1x toilet. The system control has a timer but we can't get it to work correctly. The heating doesn't come on based on the timer settings, it comes on during other times. So it does work, it's just the timer that doesn't. Looking for someone to come and fix.