My Linea 2AV masked control box has recently started playing up. The single shot (far left) button no longer lights up if you press it. All the other volume buttons work, and both left and right groups are the same. I turned the machine off for a few minutes and tried again, and the single shot button worked, but the next time I used it it was off again, so it is intermittent. I have tried reprogramming the times, and once again all the otehr buttons respond as they should. If you try to program the single shot button, when you press it to start, no water flows, but when you press it again to stop the shot, the light goes out as though it has been programmed.

I have repaired electronic devices before so I'm equipped to work on it, but I would appreciate any pointers I can get before I start. Does anyone have a circuit diagram of the Gicar masked box? Does anyone know if there are 8 separate circuits? (1 for each shot time x 2 for 2 groups) If so it seems surprising that both single shot circuits have gone at the same time.

Any help would be appreciated.

At the time that it fails, it is both groups that behave in the same way; i.e. I can't pull a single shot on either group.

I have opened up the box and the board all looks very clean. I have sprayed all connectors with lubricant, and so far it has worked every time, so hopefully it was a bad connection.

Thanks Paul for the heads up on a replacement box from Allpress. I had spoken to Ben previously but he hadn't mentioned a replacement, but i didn;t specifically ask him if he had a new one; just about old ones. Hopefully all is working again and I won't have to replace it.

On another tack: I took the opportunity of insulating the boilers and I'm pretty pleased with the results. It is much quicker to warm up from cold, and as I switch off a lunch and switch back on again at night, it retains a fair bit of heat over that period, so warm-ups then are really quick.

Hi Cecil, thanks for that kind offer. So far it is all working as it should, which is great. I took your advice and finally got around to insulating my 2 boilers; I hadn't realised you were the OP of the insulating thread.