🚀 New launch promo — 10% off orders over $300. Use code LAUNCH10
Not sure which part you need? Upload a photo and we'll find it. →
Back to diagnostic
Error Code

--- error code — Hot Spring / Watkins spa

Always cut power at the breaker before opening the spa pack or touching wiring. Spa equipment runs at 120/240V and can be lethal. If you are unsure, hire a licensed spa technician.

Three dashes on the display is the no-comms symbol: the panel lost the board. Cable and connector faults dominate; the board is the last suspect.

What --- means

Communication failure between topside and control box.

Diagnose in order

  1. Power-cycle at the breaker — this clears the majority of communication errors
  2. Inspect the topside cable for kinks, water damage or corroded pins
  3. Reseat the topside connector at the main board
  4. Replace the topside cable before the panel; replace the board only as a last resort
Recommended guide

Topside control panel not working

Read the full guide →

Likely failed parts

Frequently asked questions

Related codes & guides

Not sure which part failed?

Send us a photo of your spa pack or the failed component and our team will identify the exact replacement.

Upload a Photo
🔒 Secure checkout · SSL encrypted·Serving the US and Canada·↩️ 30-day hassle-free returns·📦 Same-day fulfillment