Are sure ? if so why do you have a programmer ?post a pic of the control pnel on your boiler, do you have a hot water cylinder ?Sorry I meant to say it is a Vaillant Combi 242E 282E
That new combi boiler is at least 30 years old, the installation instructions back then showed a Horstman time switck, looks like someone has used a programmer and the HW side wont be wired to anything, but who knows what the untrained do'mashed up' to control a new combi boiler.
Thanks interesting viewpoint. I know for a fact that there never was a hot water cylinder as the property was built in April/May 1991 and boiler fitted in July 1991.I think that would be unlikely. With an installation having just the components you describe there are a maximum of 3 things that can be connected to the Tiara programmer. The mains 230V supply, the room thermostat and the boiler. And, if the 230V supply was connected to the boiler first instead; only two: the thermostat and the boiler. However, I can see at least 4 cables connected to it. [Although it's possible not all of the wires in them are used.] However, taking this, the unused hot water function, and the vintage of the controls into consideration, I suspect that the controls remain from an earlier installation that did have a hot water cylinder, and has been 'mashed up' to control a new combi boiler. If so, for me there would be no option other than to take the old controls out and start again from scratch. Unfortunately it will be difficult to give any further advice regarding the existing installation without knowing what each of the wires in the existing cables is connected to at their other end.
Good guess at 30 years old thenThanks interesting viewpoint. I know for a fact that there never was a hot water cylinder as the property was built in April/May 1991 and boiler fitted in July 1991.
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