How To - Indicator Lights

Hugh the Tech Duck

What do the Indicator Lights Mean on Your HUG Hydronics Control Board?


Indicator lights are on the top of the control board and able to be seen when the control board is closed.

The sticker on the control board indicates what each color of light means for each light.

pump indicator lights

Pump Indicator Lights:

Grey = off

Green = mid power

Yellow = max power

Red = bad fuse

middle of control  board indicator lights

Indicator Lights for Middle of the Control Board:

Thermostat Zones:

Grey = currently not calling for heat

Blue = calling for heat and being served

Low Water:

Grey = OK water levels

Red = Low water level, please add more

MAX Temperature:

Grey = OK temperature levels

Green = Temperatures have reached maxium