dr
Sunrise Spas
Dry Heater / No Water in Heater Tube
Display shows dr or DR, and the spa will 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 after draining and refilling, closed slice valves around pump or heater, severely clogged filters, empty or very low water level.
How to Fix / Troubleshooting
Safety first: Turn off power at the GFCI immediately. Running a dry heater can permanently damage it.
- Check water level: Fill the spa to the recommended level on the Sunrise Spas skimmer. Ensure all jets are submerged.
- Open all valves: In the equipment bay, verify that all slice/gate valves on either side of the pump and heater are fully pulled up/open.
- Bleed air from system: Slightly loosen unions on the pump and heater to release trapped air until water appears, then retighten.
- Remove and clean filters: Remove filters and run the spa briefly to confirm strong flow. Clean or replace filters as needed.
- Reset error: After restoring water and flow, turn power off for 60 seconds, then back on. If dr returns, the heater may already be damaged and should be tested by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Heater Assembly
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