Heating problems

[BillynoMates]

When the water heating and heating are both turned on the hot water in the radiators are not very hot and the programmable controller turnes off and back on again every now again, but if the hot water or the heating or turned on the programmable controller stays on, can anyone tell me what might be wrong.
Thanks

 

[Simon F]

maybe the programmer is broke??
is this a change to how it worked before?

colder radiators when hot water also on, not to strange, run them at different times.

welcome along.

 

[Pottsy44]

What programmer do you have?

 

[BillynoMates]

It's a Honeywell ST9400C 7 Day 2 Channel Programmer

 

[Sparkgap]

Could do with getting the wiring checked. Could be a dodgy connection which drops out under certain conditions.