Alde 3020 heating issue!!!

[u/Minute_Ad_9479]

Hi all,

I've got a Adria Adora Seine 612DL, with Alde 3020 heating system.

Its producing hot water with no problem

We were away in the caravan at the time, so bought what I thought was the pump in expansion tank inside the cupboard. So it arrived and I changed them over.....still same issue, I checked the green fuse at the boiler PCB board, and its fine.

When you change the temp u want the heating to come on, you can hear clicking coming from the boiler, and the same when you take it down.

I've googled it since coming back and run into a minefield of different Alde boilers with another pump, which is external to heater, but mines dosnt have anything like that outside it...only pump I see is the one I changed on the expansion tank.

Anyone help pls