Valliant Turbomax Plus boiler

[bobby8457]

Hi everyone sorry its my 1st post and to start to beg for info straight away but really have problem with boiler, It comes on when its not supposed to, out side of its program in odd times, had 2 different plumbers come to fix it but still not fixed, one plumber changed the gas valve this do nothing at all, charged £260 another plumber came and said it was the main electrical board changed this for a new one at £344.
But still got the problem of boiler coming on on its own accord, i have disconnected the external thermostat so the boiler is isolated from it and operating on its own stat now, but still problem exists, the plumber is baffled, please please can someone do a proper diagnosis on it or have you any suggestions to this fault? thanks everyone! Bobby

 

[SimonG]

A better plumber. Probably external controls.

 

[bobby8457]

It has external controls of which connect direct into the main control board of which has been renewed

 

[EvilDrPorkChop]

Does it have the plug in timer on the front?

 

[bobby8457]

Does it have the plug in timer on the front?

yes it has and it has been renewed

 

[EvilDrPorkChop]

yes it has and it has been renewed

What happens if you remove the timer from the front?

 

[bobby8457]

What happens if you remove the timer from the front?

when you remove it it acts the same this is a new controller aswell as a gas valve and new control circuit panel

 

[Aquarius]

Wait until you haven’t had heating on, or wait until system cools down, then run a hot water tap and feel the flow pipe underneath the boiler.

 

[bobby8457]

Wait until you haven’t had heating on, or wait until system cools down, then run a hot water tap and feel the flow pipe underneath the boiler.

ok will do thanks

 

[Aquarius]

ok will do thanks

Just in case you’re unaware,usually the left 22mm pipe as you’re looking at it