Nilfisk c120.3 (Bournemouth BH3)

This is in good working order and gives a strong jet. the accessories are all working but the patio cleaner is very worn. There is a fault when the machine is in idle mode with the power on but trigger not pulled. The motor keeps pulsing on / off. No Water comes out when it’s pulsing but the sound is annoying. Once the trigger is pulled and the water jet starts, then it works fine without any problems.