Degzi,
Thanks for the shot of the relay box, unfortunately nothing like our 2018 SE NAVI, they must all be different, but even that photo doesn't identify which relay controls which circuit, despite what I read in the text.
Kremmen, yes, these A/C relays are known to fail on ALL Honda models, all I need to do is find which one it is!
Paul, the clutch does not operate when the button is pressed, if I knew which relay was involved I could bench test it and then do a jumper across the output terminals to see if the clutch clicks in.
These are our fuse boxes, larger one between battery and bulkhead, smaller on opposite side.
Ian