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D_Hailsham your a star thats exactly what i needed and it worked I guess thats what my fitter did the last time it went. As a customer I wasn't left the installer manual only the instrution book. On a side note is the fact this has now happened twice the sign of a fault or is it just...

Ok thanks for your help the boiler is working manually. I have a Green light if I press the little button on the reciever it goes of if I press it again the red light is always flashing so it's not talking to the thermostat. I'm not confident enougth to mess with the electrics and I also have a...

Hi I did all that but again no joy. I just remember when I had my installer out the first time this happened that he solved it by doing something in the setup options. He held the small button on the reciever in for awhile I just tried that myself and after 15 seconds or so the red light...

Hi Thankyou for the replies, I tried all of the above but no joy I,m afraid I do have a wireless router but the wireless function is currently disabled as I prefer to use it with & ethernet cable. I found this on the internet which is for the thermostat I have...

Thanks for the reply, I probably should have explained better I went through the instruction book and the only refrence I found to the problem is in the troubleshooting section on page 15. It basically says to either relocate the thermostat which makes no difference or to call your installer...

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...