Hello, I have a Worcester Boiler Greenstar CDI and Drayton RF+3 thermostat for underfloor heating. I have checked the connection to the wireless receivers for each thermostat and they work. However when the underfloor heating is on, it does not turn itself off when the desired temperature has been met on the thermostat. Does anyone know any way to fix this? The boiler was serviced in August and was fine.
Is there not a room stat for the room with UFH? Or do you think one of the stats is connect to the UFH only? If there is a thermal actuator for the UFH, its worth checking if the housing of it has cracked - as this can allow the pin in the valve to pop up all the time, and the circuit to be "on" even when the actuator is off, which could mean some odd things if other parts of the system are still circulating and there is no zone valving.