I have an IMI powermax 155 which is 9 years old. It has started to light for a few minutes, makes a rattle and then cuts out before reaching temperature. A friend who has the same type of boiler and lives over the road has checked it over. He is a heating engineer. He thinks the internal baffles are distorted and restricting airflow. Has anybody out there come across this fault before we dismantle the boiler? How can I contact IMI waterheating? The phone numbers I have tried are NU. Many thanks for any help.