Check the nozzle for blockage. Try cleaning the nozzle in a bucket of warm water (40░C). Rinse for at least one minute.
Try cleaning the nozzle switch with a sponge and warm water (40░C). If the switch remains stuck, please contact your local GreenChem office.
If you have an AdBlue system with telemetry, you don’t have to check. GreenChem will automatically refill your tank before it is depleted. If you do not have telemetry, you are responsible for checking your own storage level.
Do nothing. The red light indicates that your tank is filled to the maximum storage level. The red light will go out after a few fillings.