Had a right chew on with trying to get hot water after 240 v connection became unavailable. From a carver 1 we installed the newish gas chamber after finding the old one rusted to useless on the carver 2. After installing the flame came on and burned for 5-7 seconds then red light. So after more chew on soldered another burber module on that we believed to work and it worked!!! One day of hot water. Day later red light back on with same 5-7 second wait until it turns off again and red light comes on..... Bit sick of it, but never will one give up!!