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Please read these preventative and easy-to-repair tips. However if your dishwasher problem cannot be resolved with our easy tips, consider calling us for an appointment. We will be happy to help.
Dishwasher Inside
The main function of a dishwasher is to cut grease and sterilize the dishes by spraying hot soapy water at them. This is accomplished using an electric dishwasher motor and dishwasher pump mounted at the bottom of a water reservoir, or tub. The pump takes suction from the tub and forces water up through spray arms, which spray the dishes. The water then simply drops back into the dishwasher tub for recirculation.
Of course, hot water must get into the tub in the first place. An electric (solenoid) valve provides for this function. The hot water comes straight from your house's water heater, on regular house pressure. At the end of the dishwasher cycle, the water must be evacuated from the tub. The dishwasher drive motor drives a pump to accomplish this function.
Even under the best of circumstances, dishwashers tend to be a little shorter-lived than other major appliances. Why? Well, to answer that question, let's all be little deviants for a moment, and design ourselves a torture chamber for an electric motor.
What is absolutely the worst enemy of electricity in a dishwasher machine? Water, right? Well, then, let's use the motor to pump water, and let's mount the motor right underneath the water seal. That way if the seal leaks at all, lots of hot, steamy water will run right down on top of the dishwasher motor and rust it up and short it out. While we're at it, let's run some bits of broken glass and big chunks of food and nutshells and seeds through the pump, so we can chew up the seals and the impeller and also to introduce some nice, sudden deceleration shocks to the motor and pump. And of course, for maximum heat buildup, let's mount the whole dishwasher motor and dishwasher pump package in a tiny, cramped, steamy, dusty, poorly ventilated space, right beneath a tub full of hot steamy water. Get the picture?
Cold water can kill your dishwasher wash quality. So before letting any hot water into the dishwasher tub, we must make sure the dishwasher tub has no cold water left in it from the last wash. Therefore, in most dishwasher designs, a new wash cycle starts with the pump operating for a minute or so in the "drain" mode.
An dishwasher electric solenoid fill valve then opens to let hot water into the tub. The dishwasher timer controls how long the solenoid valve stays open, which controls the water level. A flow-control washer built into the valve compensates for variations in the water supply pressure. Most designs use an anti-flood float switch to prevent accidental overflow during the fill cycle. The dishwasher pump then starts in the "wash"
