Please help with biasi prisma 24e

[Scottynjx]

Hi please can someone help I've just moved into a new home with a biasi prisma 24e combi boiler the trouble is the plasterer took the room thermostat off the wall and plastered over it saying i didn't need it, now all I get is hot water and no central heating, the boiler doesn't fire up when I switch it on, is there any way I can bypass the room thermostat controls so I can just use manual and timer switch on for central heating, hope someone can help, thanks.
Scott.

 

[ChrisR]

Find where the mains eleccy goes in. It goes to a 5 terminal block with NEL on 3,4 and 5.
You will probably have wires going off to the stat from 1,2 and possibly 3. Obviously those should be disconnected as they're in the wall, but you need a Neutral (on 3) from the spur.
Connect 1 & 2 together to bring the heating on, but do not connect either of them to Live or Neutral.
Test everything before you touch anything - if you have the slightest doubt don't touch it!

 

[Scottynjx]

Thanks Chrisr that worked, really appriciate your help thanks again 😃