I have a Jacuzzi ECHO 110 spa that has run well for years. I have repaired several times so I am familiar with its operation. This one has me going crazy. The control goes into FL and will not start once it is satisfied and shuts down. If I shut off the power and turn back on I can manually start the pump or pump/heater with no problem but if I let it sit for a few minutes it goes into FL. If I run the pump a full cycle when it completes the cycle it goes right into the low speed/heating mode with no problem but once satisfied and shuts down it goes into FL. I am trying to figure out if I need to replace the entire control or just the display control.