Problem: Spa does not heat; jets and light operate (green logo "Ready", and Blue logo "Power" indicators are blinking)
• Integrated pressure switch open - check for clogged filters. The integrated pressure switch will reset when the flow of water through the heater has been restored. Contact our customer service team for a service if the heater trips frequently.
• Circulation pump thermal cut-off tripped - check for clogged filters or air locks in plumbing. Disconnect power to the spa, allow circulation pump to cool. Circulation pump thermal cut-off will reset when pump has cooled and power is reapplied. Contact our customer service team for service if circulation pump thermal cut-off trips frequently.
Click on below link for Hot Springs Owner Manual.