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I have a GU1200 Whilrpool dishwasher that is not cleaning the top dishes - it seems to be doing pretty

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Old 01-16-2011, 12:44 PM
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Default Whirlpool dishwasher not cleaning top dishes
Model Number: GU1200XTLT2   Brand: Whirlpool   Age: 1 - 5 years   

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I have a GU1200 Whilrpool dishwasher that is not cleaning the top dishes - it seems to be doing pretty well on the bottom rack stuff, but not on the top. I have disassembled down to the chopper which was about 60-70% clogged and has 2 out of the 4 plastic drive teeth broken off. Do I need to go deeper into the disassembly? I don't know the next step - I have the schematic, it says I can remove the wash motor and see the separator screen, but I don't know if I even need to do this - help! Thanks!


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  #2 (permalink)  
Old 01-17-2011, 01:34 PM
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Quote:
Originally Posted by 35cents View Post
I have a GU1200 Whilrpool dishwasher that is not cleaning the top dishes - it seems to be doing pretty well on the bottom rack stuff, but not on the top. I have disassembled down to the chopper which was about 60-70% clogged and has 2 out of the 4 plastic drive teeth broken off. Do I need to go deeper into the disassembly? I don't know the next step - I have the schematic, it says I can remove the wash motor and see the separator screen, but I don't know if I even need to do this - help! Thanks!

35Cents,

Yes, I would go deeper,if I were you.

Based on your post, I'm pretty sure you'll find the separator plate screen clogged as well.

You'll need to replace the impeller assembly as well(broken drive teeth).


Part number: AP3738238

Part number: AP3738238



When you're finished with that and you test the machine,

Let the dishwasher run approximately 3 minutes, unlatch the door,and wait a few seconds(20 - 30)open the door, and check the water level in the bottom of the tub, the water level should be touching the bottom of the heater element, if the unit is filling proper.

Low water level, will also affect the washability of a dishwasher, and spray arm operation.

Good Luck,

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Old 01-17-2011, 01:39 PM
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How hard is it to get to the separator screen? Do I have to pull the dishwasher out to do it?
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Old 01-17-2011, 03:01 PM
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Quote:
Originally Posted by 35cents View Post
How hard is it to get to the separator screen? Do I have to pull the dishwasher out to do it?

35Cents,

No you don't have to remove the dishwasher,
however, you'll need to remove the pump motor, or if you wish, the pump assembly from the tub,

Based on your post, You've already done most of the work, But, I've attached excerpts from the service manual, to help you along.

The entire pump assembly can be removed from inside the dishwasher tub.
1. Remove the access and toe panels from
underneath the dishwasher door by removing
the two (2) screws securing it to
the dishwasher frame.

2. Disconnect the wiring harness connectors
from the drive motor and pump motor
terminals, the soil sensor and the thermistor.
3. Disconnect the drain hose from the drain
hose connector on the pump outlet.
4. Remove the pump motor.
5. Remove the three (3) sump tabs that
secure the sump assembly to the dishwasher
tub.

6. From inside the tub, lift the front of the
sump up approximately inch.
Push the assembly back and then lift it out.
SERVICING COMPONENTS IN THE SUMP ASSEMBLY
Removing the Wash Motor
1. Remove the bolt securing the wash
motor and drip shield in place on the pump
assembly.

2. Once the bolt and drip shield are removed,
turn the wash motor until it stops (approximately
turn).
3. Pull the motor straight back from the sump
assembly. Some effort may be necessary
to dislodge the motor. The volute will remain
attached to the motor.
NOTE: When reinstalling the wash motor and
volute, do not pinch the volute seal between the
volute and sump. Use a small amount of rinse
aid on the volute seal to help installation.


Accessing Components of the Sump Assembly

Components inside the sump can be accessed without removing the sump from the dishwasher tub.
1. Remove the four (4) screws securing the soil accumulator from the sump base.

2. The soil accumulator will now lift free of the sump base.
3. Remove the screw securing the foreign
objects protector to the sump base and
remove the protector.

4. Remove the screw securing the inlet protector
to the pump base and lift the inlet
protector out.
5. Remove the chopper assembly from the
impeller shaft and lift it from the sump

base.
6. The check valve, located between the
wash motor and the drain can be removed
with a pair of needle nose pliers.
7. With the wash motor removed, the separation
screen can be removed from the sump base.


Removing the Wash Motor
1. Remove the bolt securing the wash
motor and drip shield in place on the pump
assembly.

2. Once the bolt and drip shield are removed,
turn the wash motor until it stops (approximately
turn).
3. Pull the motor straight back from the sump
assembly. Some effort may be necessary
to dislodge the motor. The volute will remain
attached to the motor.
NOTE:
When reinstalling the wash motor and
volute, do not pinch the volute seal between the
volute and sump. Use a small amount of rinse

aid on the volute seal to help installation.

Good Luck,

__________________
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Joe M. APP TEAM



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