ideal logic combi losing pressure daily. Initially i thought it was a leak on the system so all the pipework was checked and no leaks found The flow and return were isolated overnight with no demand and there was a pressure drop. I disconnected the condensate pipe and put a bucket under it but no leak. I did the check a second night but it didn't drop. i thought i must have missed something so i have isolated the flow and return again and the pressure has dropped within 30 minutes by around 0.5bar. Has anyone come across this before ? The boiler is under warranty but i dont want ideal to come out and say its nothing to do with the boiler.