Hi there, have a polypipe 3 zone underfloor heating system.
Just went to start it up for the winter as we switch it off for a few months and it’s not working.
After some investigation, there is the mains power supply going into the master control unit (which is live) but the unit itself is not coming on, there’s no power going through it, the green led isn’t lighting up. Do I need a new master unit or have I missed something? Is there a fuse on the master control? I can’t see one.