I have a100 87 year. I had problem once with my washer system. I thought pump didnt work, no sound, no anything. Like dropped dead. When I checked, it was run out of water, so I pour a mixture of water and cleaning solution but it didnt work again. Then I took a needle and put it into the nozzles on the hood for I supposed that pump somehow sucked in "mud" from the reservoire and thus blocked the nozzles. I was right. After I cleaned the nozzles it was working perfectly. Try that. Maybe somewhere something is blocking way out for the water so the pressure is released somewhere else.