!!
critical Silvercrest
Error Code H H
Overheat - The spa has shut down. One of the sensors has detected 47°C (118°F) at the heater.
? What Causes This
Excessive heating or damaged temperature sensor.
✓ How to Fix It
Remove cover and allow water to cool. Reset by pressing any button; contact service if no response.
Source: page 8 of the official manual
From the manual
This error code appears in:
Silvercrest Sfb 80 A1 Foot Spa