just disconnected all power in van

The Alde control panel?     I have seen that suggested, but we have never done it.

Other than draining down the system, we leave the solar panel working away and the alarm set. We do turn the wheels if they have not moved every 3 mths.

We too drain down all the water system, but not the Alde fluid side of the heating.    We have the van on the driveway so keep it plugged in to the  mains and this keeps the battery topped up and stops the alarm battery getting low.

We do not have a solar panel on the van, but if we did I would leave it connected as TG said.

i have owned caravans in the past and never used to bother, just store it for winter then put stuff back in and go away in the spring,   but i bought this coachman last year the liesure battery was probaly original 7 years old,  didnt hookup to 240v as when i checked we were getting a charge from solar,  unfortunately the snow came covered solar up the battery must have had cells breakdown and the alarm was taking the rest,  so i gave battery the battery a boost as it was reading below 12v more like 7v, and when on bench it was holding a charge so refitted the battery and connect to 240v  then when i next went in i could smell sulpher faintly,  switched on control panel was faint and the heater panel gradualy faded so couldnt see what was on it.  turned off the master switch, disconnected battery, bought a new battery connected it in van connected 240v, then the alde panel wouldnt work, turned out the cable to boiler had corroded at the rear of panel, so renewed then the sensor on the boiler had finished so had to replace that,,  so to save a repeat i decided to disconnect all power as it was condensation causing power to arch on the alde panel so no power no arching, and in the coachman manual it does state to remove the alde control panel for that reason.

Yes, that sounds like what I had read regarding the Alde control panel.

Our van is now just over 15 years old and we have had a few problems with the Alde.....a leak of fluid due to a pipe rubbing on another pipe.......a new PCB required on the boiler......2 new circulating pumps..........and a new control panel, though not due to condensation.

KjeIINN,  you can send the pcb to apuljack electronics and they will test and repair and send back, ( think you have to send alde control panel) thats how i found i needed a new cable,  a new one is about £250.  good luck on fixing it.  

We were in York when our PCB failed, and needed it fixed quickly, so we had to get in a repair man.  It was the thermal fuse that went.    The repair people do not repair just replace, so it was a couple of £100 for the new board and fitting.   I kept the duff board, and being a bit of an electronics nerd, decided to repair it to have as a spare.   A new fuse costs less than a £.

I have tested my repair, and I have several spare fuses, the replacement PCB is doing fine, so hopefully we are all set for a while!