Boiler Questions

[adwt2004]

I have a heat only boiler, cylinder and programmer and have a few questions.

If i time my heating to come on and not hot water, it comes on anyway and vice versa if the other way around. Is this normal behaviour because the boiler is on anyway?

Also, when heating the tank only it heats the radiator in the bedroom after it finishes with the cylinder. Is the boiler using it to dump excess heat? Its an ideal isar or icos he18

Also what does the temperature on the front of the boiler get used for? Should it be a certain settings?

cheers

 

[gas4you]

Its an ideal isar or icos he18

We need to know what it is

If an Isar the DV has stuck mid position, extremely common fault, if it's an Icos it will be a zone valve stuck open.

 

[adwt2004]

It's an icos he18, I will go to the programmer and turn off the hot water heating and leave ch on to test. Will also try it the other way around too. Is this a good way of testing for issues? when i said above "it comes on anyway" I mean the programmer light for HW and CH both come on. It's almost as if the programmer is telling it to switch on. I will do as i said above and post back.

Cheers

 

[gas4you]

You need to check the 3 port valve or the 2 port valves before anything else.