My Potterton Promax 24 HE is doing my head in. It is 7 yrs old and when i fire it up it comes on and all the rads get warm. After 10 to 15 mins it goes off and will not restart unless i go an press the reset switch. Once it restarts it only runs for about 5 mins and goes off then i have to reset it again. i have had 3 engineers round and one said NEW BOILER another said NOTHING WRONG another said NEW SAFETY THERMOSTAT POSSIBLY. quite frankly i am a 100 quid out of pocket and no one has been able to identify the problem.
please help.
please help.