Kitchen Large Electric Appliances - help with westinghouse (frigidaire) dishwasher

model# is MDB121RFM1

Tub not filling as full as it should, checked strainer on inlet valve as well as solenoid itself, both are fine. float switch is working properly as a matter of fact I can wait for the timer to stop the fill then turn the knob around to restart the cycle and it will then fill (and be controlled by the float) fill cycle runs for what seems the right amount of time (a little over a minute) so I'm wondering if it's a volume problem with the supply line or if the timer is shot.

as far as volume goes the inlet valve has a 1/2" NPT female on it that whoever installed it stuck a 3/8x1/2 brass elbow in and ran a flexible stainless to the hot water connection at the sink. the supply line to the sink is 1/2 but the valve and tee are 3/8, should I remove the 3/8" valve and sweat in a 1/2" to increase the volume? This problem has existed since we got the place, but it's worse now that I installed a PRV to take the 120 PSI static pressure down to 50 (less GPM with less pressure 30% less or so I'm guessing)

any suggestions? is there an adjustment on the timer for fill cycle time?

Probly nothing wrong with the fill cycle. The float is just an emergency overflow protector. The water level should never be anywhere near that high. Pour 1 and a half gallons of water into the empty dishwasher. THAT is how much water it should be filling with at the end of the fill cycle. That machine uses WAY less water than what you think. If your problem is that it is not throwing the water around, likely your impeller has come loose from the wash motor.

I guess you're right looking at the service guide, it shows an 87 second fill time and .83 GPM flow rate from the valve. and a 6 gallon consumption, so I guess that counts all the wash/rinse cycles.

I pulled off the cover over the impeller (referred to as the volute cover on the diagram) and it seems to be fine

Any other idea's?

what is the problem with the d/w, anyway? not cleaning? not washing? does the motor run?

not cleaning well, even with mildly soiled items (no big pieces, still moist, nothing stuck on, etc) using standard granular detergent. motor runs, pump runs, etc.... color me confused, I've worked on DW's before and never found them hard to work on, conceptually they are pretty simple. I've verified the resistance of all the components based on the service guide, everything was good to less than 35 ohms deviation from spec, with exception of the heater element which was a good bit lower than spec so I suspect it's failing but I did verify it was still operational during a wash cycle...

if there is water in the tub, AND the motor runs but it is NOT spraying the water or turning either spray arm, then the impeller is loose on the motor shaft. It will look okay, but when the motor shaft spins, it is slipping inside the impeller, instead of turning it at full speed. common problem.
In this case, the motor must be replaced. time for a new dishwasher.

Otis ain't kidding. The pump and motor is part no.154473001 and it lists at $101.00 So it might be time for a new dishwasher, just don't buy Frigidare or GE. Doug