My baxi 105e instant will not allow the c/h to come on. Even if the selector switch is set for dhw and ch only the dhw neon illuminates. Hot water works fine. It is as though it has not recognised that the switch is set for c/h. There are no warning lighs iluminated. Any help appreciated and Merry Christmas.

Craig Crawford, December 2006

you could have a faulty c/heating sensor

brian, December 2006