the pressure on my vaillant turbomax 242 (i think thats what it is) has dropped to 0. 6.30 this morning i woke up and they was water pouring out outside from the heating, that stopped after a couple a hours but i cant refill the system. its making the right noise like its refilling but the pressure wont move. iv bled the radiators nowt doing. i drained the system 2 days ago to fix a leaking radiater and when i refilled it the pressure was 1.5 but then it went up to 3 after i bled the radiaters again but its been working ok till this morning. anybody help. the instuction book iv got says turbomax vuw 242/1 E, 282/1 E on it