Hi, my Jandy PDA is showing only air temp but not showing Pool/Spa temp, instead is showing -- two dashes. The Jandy LXi 400 heater shows both air and pool/spa temp but the heater will not turn on. I replaced the temp sensor that's attached to the heater (Zodiac R0456500) but still having the same problem.
I've had the pool for eight years and I've replaced the temp sensor about 3 years ago (temp was off but no --) but the fix is not working this time. Can anyone help???