I have a Sta-Rite SR400NA pool and spa heater that is approximately 12 years old and it will not fire, nor will the fan come on. The Pool light and temp display work as normal (or appear to), and the Service Heater light comes on as soon as the heater is turned on to the Pool or Spa setting. The AFS error light is lit on the control board, but as I stated before, the fan won't even start. I've had a "pool guy" come out and take a look at it, and he thinks it is a faulty Ignition control module, but I'm not convinced. He did something to make the fan come on, but I don't know what that was. I think it may the the control board or the membrane, as I've followed the trouble shooting flowchart in the owner's manual and that is what it suggests the problem to be. I can hear the small relay on the control board click when I turn the heater on, but I don't think it is sending any voltage to the ignition control module. Can anyone help me figure out exactly where the problem lies? I don't want to just throw parts at it until it works.
Oh, and one more thing. The plastic cover over the membrane itself (not the plastic cover connected to the housing, that's been long gone) delaminated over the summer exposing the membrane to the elements, I'm not sure how long or if it got wet. Any guidance will be greatly appreciated!