dY
Sundance Spas
Dry Heater Confirmed (Repeated Dry Condition)
Display shows dY; spa may shut down heater and display a dry heater warning.
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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
Heater element burned out from running dry, Severe air lock not cleared, Failed circulation pump, Flow switch or sensor misreading flow
How to Fix / Troubleshooting
Safety first: Turn off power immediately. Do not attempt to run the spa until the cause is corrected.
- 1. Verify water level and air locks: Confirm proper water level and bleed air from the pump and heater unions as described for dr errors.
- 2. Inspect heater tube: Look for discoloration, bulging, or burnt smell around the heater assembly, which can indicate a damaged element.
- 3. Check circulation pump: Ensure the pump is running and that there is visible water movement in the spa when power is on.
- 4. Do not repeatedly reset: Repeatedly resetting and running a dry heater can cause further damage and risk of fire.
- When to call a technician: dY typically indicates that the heater has been damaged or that there is a serious flow problem. A qualified technician should test the heater element, flow switch, and pump.
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Repair Difficulty
Professional Required
5/5
Required Part
Heater Assembly
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