I replaced the touchpad ...same symptoms. I looked at the motherboard and see the sfs light is on. I am planning on replacing the stack flue sensor,(it looks fine) but I am skeptical as to how this will make the touchpad reactive. Right now spa light and service light illuminate but pushing any of the buttons has no effect. Any Ideas? BTW the heater is only a year old,,, no sign of rodents and everything looks brand new.