I noticed the pool temp on my PDA was failing (said my temp was 125), then it would not display. Thought is was probably the sensor going out; then started having falling FC levels, so figured I've got a problem with the generator and/or tri-sensor. Turned off the power and cleaned the plates and sensor, still no chlorine. Ran the system in Service Mode and everything works great, displays pool temp, generates cholrine. The PDA won't even display the AquaPure option now, but still operates all other functions. Anyone got any suggestions? Unit is 15 mo's old and has run fine.