pressurizing

My boiler is showing only 0.5 bar when not in use. I followed a video from Vaillant to re pressurise it using the loop, but nothing happened. The little plastic bit had broken off, so I did it with a spanner. In this video the loop seems to go from different pipes than on mine... Any ideas?

Hi we have moved into a new house snd one of the radiators needed bleeding.. i have bled the radiator but the the pressure has dropped to 0.4 , i have searched for a video or instructions on this model but ive had no joy. can any body shed some light .. i think its the black one but i wanted to...

Hi all Thanks in advance for any help! I bought a property recently with a 12yr old Vaillant 824 combi boiler. It seemed to work fine initially but after a few months the pressure dropped to almost zero. I looked through other threads in this forum about pressurizing the system, and followed...