Gas Leak

[Alshymer]

Hi
Maybe to save some time and effort some kind person could steer me in the right direction?
Due to an electric outage at home I tried to use the van gas.
On turning on the cylinder at the locker, I was surprised by a whoosh of gas.
It was fine last time I used the van a few weeks ago but obviously something has blown!
It has been extremely hot here so maybe a seal has gone.
My system is Autogas Aluminium bottles twin with auto changeover.
Where should I start looking?
I would appreciate any help before I start to identify the fault.
Thanks and regards

 

[Alshymer]

Sorry not an auto changeover!! The cylinder pipes go into the Tuma Monocontrol valve.

 

[Alshymer]

The gas is coming out from behind this valve.
Is this fixable or do I need a new valve?

 

[ProDave]

Picture of "this valve" please?

 

[Alshymer]

Picture below.
I believe there is an update to this valve now.
Is it worth 4 x the price?
Thanks

 

[Alshymer]

The yellow button is out and if I turn on the cylinders I can feel considerable gas escaping.
I believe that this is the crash sensor button but if it does come out, surely gas should not be escaping!!
The regulator is probably faulty now!

 

[Alshymer]

Ordered a new regulator now.

 

[yeoblade]

I replace my crash sensor one, when it failed, with a normal one. I decided if the crash sensor one leaked without crashing I'd be safer with a standard one that just doesn't leak