dY
Hydropool
Dry-Fire Protection / No Water in Heater
Display shows DY or DRY; heater is disabled and spa may not heat.
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Safety Warning
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.
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Possible Causes
Air lock in heater plumbing, Very low water level, Blocked suction or closed valves, Failed circulation pump on Hydropool spa
How to Fix / Troubleshooting
Safety: Running the heater without water can permanently damage it. Turn off power immediately if DRY is displayed.
- Check water level: Ensure the spa is filled to the proper level above all jets and skimmers.
- Open all valves: Verify that all slice valves around the pump and heater are fully open and locked.
- Bleed air from heater: With power OFF, loosen the heater unions slightly to allow trapped air to escape until water seeps out, then retighten.
- Prime circulation pump: If the pump is air-locked, loosen the pump union or remove the pump discharge hose briefly to release air, then reassemble.
- Restore power and test: After confirming full water and no air, turn power ON and observe for normal flow and heating. If DRY returns, the flow sensor or heater may be damaged and require professional service.
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Repair Difficulty
Medium
3/5
Required Part
Hydropool circulation pump
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