Why is my Worcester 28i junior tripping out all the time?
For the last week, my Worcester 28i junior has been igniting and circulating OK, but the bar perssure is fluctuating inconsistently between 0.5 bar and 3 bar. It cuts out when it reaches less than 1 bar or more than 2.5 bar (as per the manual) and does not allow the heating to be on for more than 20 minutes before tripping out. There are no water pressure issues with my neighbours. HELP - I'm cold!!
John Rothwell, January 2009