I have Hayward H400 spa & pool pump I switched the pool pump to an ultra energy efficient Pentair Intelliflo. After the switch my spa controls kept reading LO when the pool pump was running. The replacement was done by a pool store repair guy, I had him come back & check on it, he opened the controls on the spa, then disconnected the control board & reconnected it. He said it was loose. My spa was running perfectly before I changed out the pool pump. Now my spa controls are reading communication error between ignition board & display board, what is going on? The spa heater is not turning on, only the jets are working.