Lay-Z-Spa displays E06 and disables the heater; bubbles and filter may still work.

Safety first: Unplug the spa and do not attempt to open the sealed control box unless you are qualified. There is a risk of electric shock.

• 1. Visual inspection: With power disconnected, inspect the exterior of the pump/heater unit for burn marks, melted plastic, or a burnt smell near the heater area.
• 2. Check for tripped RCD or breaker: If the RCD plug or house breaker trips when you try to heat, the heater element may be shorted.
• 3. Try filter-only mode: Run only the filter function. If this works without error but E06 appears when enabling heat, the fault is isolated to the heater circuit.
• 4. Do not bypass safety devices: Never attempt to bypass relays, fuses, or thermal cut-outs to force the heater to run.
• Next steps: Diagnosis of heater resistance and relay operation requires opening the unit and using a multimeter. This should be done only by a qualified technician. In most cases, the heater assembly or entire pump/heater unit must be replaced.