** bleep ** Some Further Testing, the gas pressure drops to about 5mb at the testpoint. The gas stove is adversely affected as well, any rings are on low did want to go out When the boiler flame starts. HOWEVER, once the fault OCCURS the pressure goes back to normal (22MB) in less than one second. Ive had 6 guys around now to look at it and no one has a clue. Some say there is a blockage, some say there is something wrong with the gas diaphragm ?? (where the gas goes in just next to the TestPoint). If its a block Quickly how would the pressure rise back to normal? Does the boiler have the ability to suck all the gas out of the system Which is providing 16 cm / m? I had a Viessmann authorized tech out and he says if the ionizer sample what defective, the system would shut down in seconds as apposed to 50 seconds. The system shuts down When the gas pressure hits about 5mb.
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