Hot Spring / Watkins · Hot Spring spas with Power and Ready indicator lightsFix soon
Power and Ready lights blinking on a Hot Spring / Watkins hot tub: low flow through heater
When both the red Power light and green Ready light blink, the pressure switch is open because not enough water is flowing through the heater. The heater is off until flow returns.
Also shown as: both lights blinking, red and green lights flashing, green and red blinking
Most likely causes
- 1Clogged filtersmost likely
- 2Air lock after a refill or low watercommon
- 3Failed circulation pumpcommon
- 4Failed pressure switchless common
What to try, in order
- Check the water level.
- Turn off power at the breaker, remove the filters, and clean them thoroughly.
- Restore power. The pressure switch resets itself when flow through the heater returns.
- After a refill, run the jets with all jets open to push out trapped air.
- If both lights still blink, call your dealer or a technician.
Power and Ready lights blinking questions
Why are both lights flashing on my Hot Spring?
Low water flow through the heater. Dirty filters are the usual cause.
How often should Hot Spring filters be cleaned?
Rinse them every 1 to 2 weeks and soak them in filter cleaner about once a month. Replace them when the pleats stay discolored or frayed after cleaning.
Related codes
General guidance. Follow your manufacturer's instructions; anything inside the control box is work for a licensed professional. Updated October 5, 2026.