I have afriend who is having a problem with his oil burner.He was told he needed a new control box to fix the problem by his service man. He got the control box installed but the problem is occuring.He has a reillo burner and the problem is that when the heating is turned on it goes to lock out ,but it does not do this everytime.it can happen 1 in every 10 times heating is switched on. would a new nozzel be a help.
Regards, paul