Hi
We recently had a new boiler fitted and it was fitted with a Honeywell CMS921B1042 wireless thermostat but it has lost communication with the boiler and the red light is just flashing on the box by the boiler. I know that it's just a case of pushing some buttons but I don't know which ones and in what order so that I can get the wireless comms back.
Hope it makes sense can anyone help.
Cryax
We recently had a new boiler fitted and it was fitted with a Honeywell CMS921B1042 wireless thermostat but it has lost communication with the boiler and the red light is just flashing on the box by the boiler. I know that it's just a case of pushing some buttons but I don't know which ones and in what order so that I can get the wireless comms back.
Hope it makes sense can anyone help.
Cryax