ER-4 THERMAL TRIP
Problem: Heater thermal trip activated. Heater has been active and has had insufficient water flow over the element. Low or no water flow has caused the heater temperature to exceed its maximum limits and the spa control has shut down operation to prevent any damage to the heater unit.
Cause: Low water level, airlock in pipe work, closed shut-off valves, dirty filter cartridges, filtration pump failed or operation intermittent
Solutions: Turn mains power OFF and wait 10-15 minutes for element to cool and thermal cut-out device to reset. Then turn power back ON
Check spa water level (refill if necessary)
Remove filters and clean as per manufacturer’s recommendations or replace cartridges if required
Check under spa cabinet to ensure all shut-off valves are in the OPEN position
Bleed airlock from pipe work by slightly loosening couplings on front of filtration pump or by removing filters and flushing water down pipe work with a hose.
If problem persists please contact our Customer Service Hub.