Jacuzzi pool heater display and controls reset intermittently, especially when the blower or pump starts.

Safety first: Turn off power at the breaker before tightening any electrical connections.

Steps to stabilize power:

• Inspect supply wiring: Verify that the heater is on a dedicated circuit sized per Jacuzzi’s requirements. Tighten all lugs at the breaker and heater terminal block.
• Check neutral and ground: Ensure neutral and ground connections are secure and corrosion-free.
• Test transformer output: Measure low-voltage output under load. Replace the transformer if voltage drops significantly when the blower starts.
• Separate circuits: If the pump and heater share a circuit, consider moving them to separate breakers to reduce voltage sag.