I have a majorca 240/6 back boiler/frontfire. About 5 years ago I had to have the central heating on all the time in order to get any hot water. I found that one of the two port valves burnt out (open circuit) and the control timer was burnt on the circuit board, so i renewed both two port valves and the control timer. I also changed the pump and thermo coupling. The heating and hot water system then worked fine.
The same thing has now happened again, so I have renewed both two port valves and the control timer. I did not renew the pump as it is working fine, but I did renew the thermo coupling. Now when you switch on the boiler, it fires up, runs for about 3 to 5 mins then cuts out. The pilot light is staying on all the time.
Any ideas?

Many thanks, Baggy

Baggy, December 2008

thanks Tony
checked water supply header tank all ok it does seem as if there is an air lock some where, but i cant see where? rads all vented, hot water vents through all the taps?
any more ideas?

Baggy

Baggy, December 2008

Check the header tank has water in it.Could be a blocked cold feed.

Tony S, December 2008