A
AMHLincs
Hi, we're in an old, complicated house with 3 heating zones - two run via Nest with radiators, and working well. UFH in the kitchen worked fine last winter, but now when I call for heat the boiler doesn't fire up. It does fire up if I call for heat via the Nest/radiators in the old part of the house, or for the hot water (run through Nest as well). When I turn up the thermostats for the UFH the unit in the boiler room lights up, so the message is getting that far, just not to spark up the boiler. It's a Polypipe system if that makes a difference...
