Model No. AKM274/1X
Thermocouple is in flame.Flame spreader is not blocked.
Two rings failed and the third approx. 15 mins later.
Fourth ring still OK.
I changed the wires round and had all four working as they should.
Tried igniting two or three times and all OK.
Went to try again 10 minutes later and having problems with one that will
not stay lit, but all other three are OK.
I am getting totally baffled, just cleaned the thermocoupling connection for the one that will not stay lit connected it back and now none of the four will stay lit.
My wife used the hob this morning without any problem, other than the one which would not stay lit.
I don't understand why it is intermittent.
I disconnected thermocouple wires from valves and sprayed WD40 into valve and hey presto all four working
Thank you for all your assistance.