hi again

typo in my post:

what is strange is - if i set the boiler programmer to HW only, the
boiler comes on, if i set it to CH and HW both, the boiler comes on,
but if i set it to HW only, the boiler doesnt do anything.

the last part should have said:

but if i set it to CH only, the boiler doesnt do anything.

thanks
Kiichi