Display shows Er1 or ERR1 and spa will not start normal operation
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Disconnect power at the GFCI breaker before opening the control pack.
Er1/ERR1 is a generic error that often relates to sensor or configuration problems.
- Check all sensor connections: Verify that temperature, high-limit, and flow/pressure sensors are plugged into the correct labeled ports on the control board.
- Inspect harnesses: Look for pinched, cut, or chewed sensor cables and repair or replace as needed.
- Verify configuration switches: Compare the dip switch or jumper settings on the control board to the American Whirlpool wiring/configuration diagram for your model.
- Power cycle: After corrections, restore power and see if Er1 clears.
If Er1 persists, the control board may require reprogramming or replacement by an authorized service provider.
Repair Difficulty
Required Part
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