Whirlpool drain propblem

Dishwasher Repair
1

I’ve had this Whirlpool 1200 dishwasher for about 6 yrs now.
Every couple years it eats an impeller/chopper and I’ve gotten pretty
good at tearing it down & replacing the thing.
A couple months ago it started a new problem. Every once in a while
there would be [pretty clean] water standing in the dishwasher at the
end of the cycle. [i leave them in over night- it was there in the morning]
Nothing was leaking so I figured it must be the drain pump- as the
overflow was working somehow. So I got a new pump and all was well
for a while.
Next time there was water standing in it I tried blowing back through
the hose where the drain goes into the disposal. Bubbles came up
in the dishwasher- and it drained when I hit the cancel button.
A couple weeks later it clogged again. This time I thought I’d try to
suck the clog through the pipes. Hooked shop vac to drain at
disposal- tried to suck for a couple minutes. It wouldn’t budge. But
I could still blow into that pipe with just a couple pounds pressure
and clear the clog.
Now it is leaking out a little bit during the cycle. Sometimes it
seems to clear itself- as I’ll have a puddle, but the drain will be
working by the end of the cycle.
Other times it dumps a quart or so of water on the floor. Sometimes clear- asometimes dirty.
Through all this it seems to be washing the dishes well- glasses and
silverware are rarely spotted.
Any thoughts on where to look?
Thanks,
Jim

2

Hi Jim,

Did you see where it was leaking from?

The model number you posted does not come up.

Gene.

3

Looks like it comes around the left side of the door when the overfill quits working.

Sorry about the model number-- I put an extra ‘T’ in there- should be GU1200XTLTO.

Jim

4

Hi Jim,

There are a couple things I would check first: the drain hose for a floating foreign object and possible hole in it, and the check valve in the pump sump.

Gene.

5

Thanks Gene-
I just cured it[?] today.

Seems it was 2 problems. The intermittant clog was the little rubber flapper of the check valve that had come apart-
Model GU1200XTLT0
part number 5 on the pump and motor parts diagram [Part Number: AP3152971 ]
I tore things down to where I could see the inlets to both pumps and ran 3 cycles before it clogged again. Then I blew like hell on the drain hose back towards the dishwasher, and the little rubber disk appeared.

The leak seems to be a bad door seal as I don’t get any standing water now- but it still leaks & it is definately around the door. Parts about $20 apiece.

I’ll know for sure next week- but I think life is good.
Jim

6

Jim,

I’m glad you found it.

Gene.