Hi, I am not sure how to proceed. I have a 15 year old minimax 400 heater. When I turn on the heat, all 4 lights (TSTAT, AUX, PRESS and HEAT) come on and it begins heating. Within a minute, all 4 lights start flickering and I hear a clicking from the control board and the gas valve. The clicking matches the speed of the flickering. After a shot while, the heat light goes off and the others stay on, still flickering. Now the only clicking I hear is from the control board.
I have already replaced the transformer but it didn't help. It was rusty and had an exposed wire so I don't consider it a waste of money.
I'm thinking I need a control board but I don't want to buy one if I don't need it. Any advice would be appreciated.