Recent content by spudly1

i had similar problem where it wouldnt switch off till it overheated changed pcb worked fine yo cant get ressistor on its own though have to replace whole board,

you need to get into the junction box and check between neutral and orange s/live for240v. this is what will tell boiler and pump to start running if you dont have this then it is a good chance that you may have a problem with external controls stats timeclock etc

f22 is a low pressure/dry burner code that plastic pipe is your condensate which may be frozen in cold weather which is backing up and causing to leak. i think some vaillants will only condensate on hw mode this is why it,s leaking only when you use hot water try pouring kettle over plastic...

are you getting a rise of 35c as this is all it will heat the incoming water by and especially this time of year. the mains water temp may be coming in lower.