I have a 7 year old sta rite 400na natural gas heater that stoppped heating. did research and found out the afs was lit on the control panel did recommended trouble shooting per owner manual. I have replaced the air flow switch, and when i disconnected the tubing from the bottom of the air blower water drained from the blower. after installing the new air flow switch he heater still does not work.. does anyone know what water from the air blower indicates......should i replace the air blower or is something else causing the problem?
thanks for the help