Leak from Novatronic W310

the actual cold water doleniod its self is probable faulty if tests out ok then take the connectors off the the soleniod select a wash start machine and test for power to the soleniod if no power then faulty computer

This is not just for your camper, but general troubleshooting.
Drain the water from the belly pan. Hook up water supply to shore water source. With water source turned on, allow some time, 1-4 hours, and check if water has returned to belly pan. If water is present then the problem is with the fresh water system. If no water, either it is a small/slow leak or the problem is not with the fresh water system. Next test the grey water tank by pouring some red food color into the shower or sink drain. Flush it into tank with water. Again, wait for some time, maybe over night, and then check for red water in the belly pan. It may take longer for the leak to appear as the grey water tank does not have pressure. If no water, check the black water tank with green food coloring and same technique. If there is colored water, red or green, in the belly pan, then the leak is with associated with the grey or black water tanks. If no water is present after these tests, then the leak may be very small and it may take days or weeks to have water re-appear. In any event, clear water is fresh water system, red water is grey water system, and green water is black water system. With any of them, checking the tanks themselves and all pipes and connectors to/from should find the leak source. The last possibility is that water is entering the belly pan from a roof or vent leak. Check to see if water returns to belly pan after a good rain. If so, the water may be clear or slightly dirty. If it is a roof leak, I have found the best repair is to use Peel and Seal roll roofing It is light weight laminated aluminum and self sticking. Cutting and applying narrow strips 4-6" wide, will seal any caulked area. It costs $95 (3' x 33') at Lowes. A 30" motor home can be completely covered with three (3) rolls, in half a day. I have re-topped 5 motor homes (one 7 years ago) and no more leaks on any of them. The product was developed to seal the roofing joints of mobile homes. Topping should last 15+ years.

Check the motor brushes and belt.

Hey - the inlet solenoid must be faulty - unless you have changed the wash options which is an outsider possibilty.

it is leaking internally. When the drip tray is full, it tells you to empty the drip tray. when the machine has a problem and develops a leak, it locks up and displays watersystem fault. contact miele at 800 843 7231 and they can put you in contact with a service center in your area.

A good way is to have the system charged with freon and A/C dye which will glow a bright green/yellow at the source of the leak.
If no leak evidence under hood after this check then the A/C evaporator coil under the dash is the likely source of leak.
Sometimes the schrader valves (ports where the system is charged) can develop a leak. You could put a few drops of water in the valve and see if any bubbles appear.

there is still water in the waterproof tray at the bottom of the machine and the float switch has activated. pull the machine out (if pipes allow) and tip the machine backwards to drain the water from the tray.

Miele novatronic w864 washing machine.This video will show you how to keep your soap draw clear and how to service the parts
Please remember to subscribe to our YouTube channel for all appliance tutorials
a 4 THUMBS rating is appreciated for answering your FREE question.