Jacuzzi pool heater frequently locks out and requires manual reset, but no specific error code is stored.

Safety first: Turn off power before tightening or reseating any connections.

Steps to improve reliability:

• Inspect all safety circuits: Check wiring to pressure switch, high limits, rollout switch, and flow switch. Tighten spade connectors and replace any that are loose or corroded.
• Wiggle test: With the heater running (performed by a technician), gently move harnesses to see if operation is affected, indicating an intermittent connection.
• Replace marginal switches: If a switch tests borderline or shows intermittent continuity, replace it with a Jacuzzi-approved part.