in service mode and boiler on max the flue temp goes way up to 90c all other reading are ok . i rang Worcester and they said it was ok but i wonder if its the towel rail first of the boiler causing the high temp no thermostatic just lock shields. in hot water only mode tap full on its 68c .Although none of the thermostatic s had shut down in service mode and with hot tap running still high flue gas readings 90c after 8 mins full rate. ratio 0.0010- ppm about 100 on max- meter working pressure 20.5 gas valve 19 on max
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