Display shows dY or DY after a dr error, spa locks out heating.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Repeated dry‑fire detection by control, Persistent air lock, Severely restricted flow, Faulty flow/pressure sensing

Safety: Turn off power at the breaker.

Resolve underlying dr issue: Follow all steps for the dr error to ensure the heater is fully flooded and flow is restored.
Reset power: After correcting flow, leave power off for at least 30 seconds, then restore power to clear the lockout.
Monitor startup: Watch the spa through a full heating cycle. If dY returns, the heater or flow sensor may be faulty.

Continued dY errors after proper priming indicate a need for professional diagnosis of the heater and control pack.

Medium 3/5

Heater Assembly

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