Useless woman and a dodgy boiler

[Sweetk]

I wonder if any of you can help me.
I had a combination boiler fitted 2 years ago its a Riva Advance HE.
It's been working perfectly but recently it started leaking. I needed a new rubber seal which has been fitted and works great.
So today I noticed it dripping again, my plumber came and noticed it was leaking from the same area, he fixed it and said it is just the seal.
After he left i turned the tap on and water was cold.
Looked on boiler panel and the red Lock out button was on. After 30 seconds the red light went out and the water was hot again.
So now it keeps doing the same cycle.
I turn the tap on, hot water comes out, I turn the tap off, the boiler red lock out switch comes on. After 30 seconds the light goes out and it works again.
My plumber said its strange as normally you have to press the reset button when the boiler locks out but with this it's resetting itself.
He checked several things and can't find out what's doing it.
We checked the manual for fault lights and its basically saying there isn't water in the system, but there is!! He's checked and water is definitely flowing.
Any ideas?

 

[CBF]

air in the top of the hex maybe

 

[Agile]

You may need a boiler engineer rather than a plumber.

If he cannot fault find on such a simple boiler then he cannot be much good!

Tony

 

[hazetimesfive]

there might be water, but is there pressure.

 

[mcmoby69]

two kinds of faults on most boilers that lead to lockouts.

volatile and non volatile.

non volatile reset themselves, volatile faults dont.

yours sounds like an overheat problem after the tap is turned off.

i fitted one of these last month, customer supplied it. i didnt really want to do the job TBH. Biasi rank high up on my hate list.

first question, is the benchmark book filled in properly ?

 

[Agile]

Biasi boilers are perfectly fine and the OP's has been working fine for the last two years.

But all boilers need to be properly installed on a clean system!

Tony

 

[Sweetk]

Thanks for the replies.
He checked the system for Air, he initially thought it was that but it wasn't.
I've just watched it today and I turned the tap off and it locked out for literly 2 seconds before resetting and working fine.
It doesn't seem to be affected by the heating only hot water.
The pressure gauge is at 1bar.


P.s - he is not just a plumber he is a gas safe registered engineer. He fitted the boiler. He also gave the system a power flush before fitting this boiler.