The problem i have is that when i turn the CH on it fires up for about 5-15 mins then shuts off.If i reset a few times i can get it going again but this problem can happen later and have to start resetting again.Also ive noticed as this happens when burners are on for CH the pump is running but when burners turn off the pump stops running.Plus when the CH cuts off if i turn hot tap on it does not fire up but the water is red hot for a few seconds then goes cold.water runs normal if i turn off CH n reset.Any help would be appreciated.