Display shows PR or PUR and pumps run automatically when power is first applied; spa does not immediately heat.

Note: PR is usually a normal priming mode, not a fault.

• Allow priming: When PR appears, press the JETS button to run each pump and purge air from the lines for 1–4 minutes.
• Bleed air manually: If pumps are noisy or not moving water, loosen pump unions slightly to release trapped air, then retighten.
• Exit priming: After priming, either wait for the control to exit automatically or press the appropriate button combination per your Jacuzzi manual.

If the spa remains stuck in PR and never enters normal heating mode, the control board or topside panel may be malfunctioning.