F14 - "level/pressure switch failure." The level switch monitors the dishwasher's water pressure, as it circulates, which is especially critical, during the heating cycle (main wash). Level switch failure can commonly happen from poor circulation, or from the defective level switch, itself. The most common reason for poor circulation is low water fill level. In other words, during the water intake cycle, insufficient water came into the dishwasher. Observe if enough water did come into the dishwasher, Check the water level, by using the filter's handle (located on the floor, of the inside of the dishwasher) as a reference point. At the end of the water fill stage, the water level should be just underneath the filter's handle. If the water level is more than half an inch, below the filter's handle... then that could be a problem. The sympton would be a noisy, sluggish, whooshing sound of water, during circulation - It wouldn't be the same old quiet Miele dishwasher you knew. If you have this problem, then look at the dishwasher's water intake hose. Miele call this their Waterproof System hose (WPS). It's a water hose with an integrated electric valve. First, shut your water valve that connects to this WPS; disconnect the WPS from your valve; look inside the end of the WPS. With a needle nose plier, remove the rubber seal, filter and the water restrictor; clean them of any possible debris; put all the parts back into the WPS, securely; reconnect the hose; open your water valve; and test the dishwasher. If the problem persists, then the WPS will need to be replaced (WPS~$170). F14 - "level/pressure switch failure." The level switch monitors the dishwasher's water pressure, as it circulates, which is especially critical, during the heating cycle (main wash). Level switch failure can commonly happen from poor circulation, or from the defective level switch, itself. The most common reason for poor circulation is low water fill level. In other words, during the water intake cycle, insufficient water came into the dishwasher. Observe if enough water did come into the dishwasher, Check the water level, by using the filter's handle (located on the floor, of the inside of the dishwasher) as a reference point. At the end of the water fill stage, the water level should be just underneath the filter's handle. If the water level is more than half an inch, below the filter's handle... then that could be a problem. The sympton would be a noisy, sluggish, whooshing sound of water, during circulation - It wouldn't be the same old quiet Miele dishwasher you knew. If you have this problem, then look at the dishwasher's water intake hose. Miele call this their Waterproof System hose (WPS). It's a water hose with an integrated electric valve. First, shut your water valve that connects to this WPS; disconnect the WPS from your valve; look inside the end of the WPS. With a needle nose plier, remove the rubber seal, filter and the water restrictor; clean them of any possible debris; put all the parts back into the WPS, securely; reconnect the hose; open your water valve; and test the dishwasher. If the problem persists, then the WPS will need to be replaced (WPS~$170).

Other causes for F14, can be weak circulation from foreign item(s) (plastic wrapping, broken glass, etc,...) lodged inside circulation pump impeller, or no circulation, at all (circulation pump stuck). Of couse, the defective level switch, itself, can cause the F14, too. The least common causes for the F14 can be broken wires to and from, level switch and electronic unit, and a defective electronic unit. Other causes for F14, can be weak circulation from foreign item(s) (plastic wrapping, broken glass, etc,...) lodged inside circulation pump impeller, or no circulation, at all (circulation pump stuck). Of couse, the defective level switch, itself, can cause the F14, too. The least common causes for the F14 can be broken wires to and from, level switch and electronic unit, and a defective electronic unit.