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I have them from the instructions provided. It's threw me when in the manual it's common, water off and water on. And on the old stat just C and LOAD. Learnt a lot through my error though.

PCB changed and all happy and working. And in the end I had wired the hive up correctly as this is also working aswell. Thank you all for your help.

When the engineer turns up I will point him straight towards that then.

Thankyou for the help anyway. Now I have to think of what I'm going to do regarding flue inspection hatches as I don't have any and I don't know where the joints are!

I have conceded to the fact I think the PCB has died hence taking out the fixed repair and annual cover. Hopefully it will all be happy and running with my hive system tomorrow. Part of me thinks there may have been a pre existing issue considering when wired up to the diagram provided the hive...

Just a quick update. Replaced interface card. However this hasn't solved any issue. When switched on the boiler fires up 3 times. Each time you hear the flame start but then it goes off. The green light does not illuminate at all in this process. After the 3rd time it comes up with an F1. Plus...

The fuse is in tact. The hot water was working yesterday but today it decided not to work at all. Hoping replacing the interface module will fix that.

Ok that's all understood. Will check it all and hope to God it didn't go past the interface module.

So just to clarify. Once the interface board is changed as per the part number I have quoted, things should function as normal without having to replace anything else?

My old control was wired to black and grey. Which at the boiler changed to pink and blue. One was in C and one was in LOAD. And that is exactly what it did. It blew the resistors. All black and crusty. So therefore I'm assuming this is why the boiler refuses to work and just by replacing this...

Glow-worm 2000801923 interface card printed circuit board This is the part that visually failed and am just curious as to what it's function is. Also hoping that it is the sole cause of my woes

So when I originally installed the hive I put the black on 1 and the Grey on 3 and then someone advised me to put a link in from L to 1. This was a bad move. There is a small pcb that has the L and N to it and some coloured wires that has a couple if resistors blown. I ordered a new one and it...

Basically just to let you know the current set up but when connecting black and grey common and load there is still no reaction from the boiler now. N BLUE L BROWN 1 BLACK 2 - 3 GREY 4 -

Hi. I'm new here and was wondering if I could get some advice. Today I fitted a hive heating only system to my glow worm cxi24 combi boiler. Wired it all up. Hot water ok but when system called for heating it wouldn't fire up. Looked online at possible causes and like a numpty ended up blowing...