If the problem started after changing the INTENZA filter, remove the filter temporarily and try dispensing water again. The EQ500 documentation specifically identifies air trapped inside the water filter as a cause when the machine will not dispense drinks. If flow returns without the filter fitted, concentrate on preparing and refitting the filter rather than the pump.

Take the filter out and immerse it in water with the opening facing upwards. Keep it submerged until no more air bubbles escape. Refit it by pressing it firmly and straight down into the connection in the water tank. An air-filled filter can prevent the EQ500 drawing water correctly.

Take the water tank completely out, refill it with fresh, non-carbonated water and reinstall it firmly. If the machine displays “Please refill water tank” despite being full, incorrect tank positioning is one of the documented causes.

If the EQ500 isn't recognising the water supply, inspect the float in the tank. A stuck float can make the machine behave as though the tank is empty. Remove the tank, clean it thoroughly and make sure the float can move normally before reinstalling it.

The troubleshooting information specifically identifies residue from limescale remover blocking the water tank as a possible reason the machine won't dispense a drink. Remove the tank and rinse it thoroughly with clean water before trying the machine again.

If the problem developed gradually rather than suddenly, limescale should be considered. The EQ500 documentation links heavy limescale with slow coffee dispensing and other performance problems. Run the machine's Descaling programme and allow it to complete fully. Don't interrupt the service programme part-way through.