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Whirlpool DU1145XTPQA Doesn't drain completely after any cycle

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My dishwasher has always not drained completely after any cycle (light, normal, etc), but I've just gotten around to looking

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Old 12-22-2010, 01:21 PM
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Default Whirlpool DU1145XTPQA Doesn't drain completely after any cycle
Model Number: DU1145XTPQA   Brand: Whirlpool   Age: 1 - 5 years   

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My dishwasher has always not drained completely after any cycle (light, normal, etc), but I've just gotten around to looking at it. I know that there should be *some* water at the bottom to keep the pump seal lubed, blah, blah, but after each cycle, there's enough water in the bottom to cover the element. I've never had an overflow, so either my overfill sensor is working properly or someone should tell me that, "that's how this dishwasher works." It drains completely (albeit slowly) when pressing the cancel/drain button, but I shouldn't have to go through this exercise after every wash. There are no obstructions in the drain lines or garbage disposal, I have no air-gap inline with the drain. I've checked everything from inside the tub (checked the chopper/screen and check-valve) and everything looked okay. Am I looking at a new drain motor or what? Is there a drain impeller or something else I should be looking at before the motor?


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  #2 (permalink)  
Old 12-22-2010, 02:24 PM
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Quote:
Originally Posted by blackhammer52 View Post
My dishwasher has always not drained completely after any cycle (light, normal, etc), but I've just gotten around to looking at it. I know that there should be *some* water at the bottom to keep the pump seal lubed, blah, blah, but after each cycle, there's enough water in the bottom to cover the element. I've never had an overflow, so either my overfill sensor is working properly or someone should tell me that, "that's how this dishwasher works." It drains completely (albeit slowly) when pressing the cancel/drain button, but I shouldn't have to go through this exercise after every wash. There are no obstructions in the drain lines or garbage disposal, I have no air-gap inline with the drain. I've checked everything from inside the tub (checked the chopper/screen and check-valve) and everything looked okay. Am I looking at a new drain motor or what? Is there a drain impeller or something else I should be looking at before the motor?
Blackhammer,Have you removed the unit from the cabinet and checked the drain hose for twists, kinks ,or a clogged splice, etc ?If you've had this problem since new, thats where you need to start.I doubt if you need a drain pump but here's the part number,AP3865489It has everything you'll need.Good Luck,
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Old 12-22-2010, 06:22 PM
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Joe, I've already checked the hoses--I installed the dishwasher a couple years ago and after a few days, I pulled it out to check on the slow drainage (checked all hoses, kinks, couplings, etc), and figured, "well, I guess this is how it works." I pulled all the hoses coulings apart to inspect for obstructions and found none.

I even ran the dishwasher out of the cabinet where I could visibly see that all hoses were not kinked or pinched and it still performed the same.

I told my wife that if I had to pull that *&^%# dishwasher out of the cabinet again without a fix for the slow drainage, we'd just get a (another) new one.

Just as a sanity check, if you'd describe how the water comes out of the drain for a dishwasher, you'd describe it as a garden hose on full blast, right? That's how all of my other dishwashers expelled water. This one has water trickle out, like you'd expect from an under-acheiving pump or kinked drain line.

The reason I ask is if the slow rate of drain is what's expected out of this pump, then, it may be a control board issue and at that point, I'd rather just invest the cost of the board towards another dishwasher.
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Old 12-23-2010, 08:52 AM
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Quote:
Originally Posted by blackhammer52 View Post
Joe, I've already checked the hoses--I installed the dishwasher a couple years ago and after a few days, I pulled it out to check on the slow drainage (checked all hoses, kinks, couplings, etc), and figured, "well, I guess this is how it works." I pulled all the hoses coulings apart to inspect for obstructions and found none.

I even ran the dishwasher out of the cabinet where I could visibly see that all hoses were not kinked or pinched and it still performed the same.

I told my wife that if I had to pull that *&^%# dishwasher out of the cabinet again without a fix for the slow drainage, we'd just get a (another) new one.

Just as a sanity check, if you'd describe how the water comes out of the drain for a dishwasher, you'd describe it as a garden hose on full blast, right? That's how all of my other dishwashers expelled water. This one has water trickle out, like you'd expect from an under-acheiving pump or kinked drain line.

The reason I ask is if the slow rate of drain is what's expected out of this pump, then, it may be a control board issue and at that point, I'd rather just invest the cost of the board towards another dishwasher.

Hammer,

Based on your information, and all the checks you've made,

I would have to think, you've got a bad drain pump assembly.


Part number: AP3865489

Part number: AP3865489



That's a bit strange for a "new" dishwasher.

With the 2 to 2.5 gallons of water in a full tub, that unit should drain,and be empty in less than 60 seconds(avg of 30 to 40 secs.).

It should'nt be a trickle, but it's not going to be a garden hose either.

I seriously doubt a control board problem, check or replace the pump

Good Luck,

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Old 01-31-2011, 09:00 PM
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Joe,

I ordered and replaced the drain pump a little while back and things seemed to be improved.

The dishwasher ran great for the first few days, then slowly started to get bad again.

The first sign was that there was lots of water in the tub again after completing a wash cycle, the second sign was the wash cycle was taking longer again and the third sign was that our dishes were not as clean as they have been in the past.

While I had some time, I spent a little more time poking around. The drain lines seems to be free and clear of obstructions.

The water now is even slower coming out of the drain line than it was before. You said that the pump should move a lot of water out quickly--30-45 secounds to drain a full tub--right now, it takes almost 6 minutes to empty the tub.

While watching the dishwasher drain, when the pump stops, water will retreat back down the drain hose and back in to the tub. If I blow in to the drain hose, I can force the water out of the drain hose and back in to the tub (I can also blow bubbles in the tub with the drain hose).

Could my drainage woes be a check valve issue? I've removed/cleaned/checked/reseated the check valve, but have little improvement in drainage. Could the check vavle be improperly seated and be blocking drain and also not stopping backflow?
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Old 02-01-2011, 07:13 AM
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Quote:
Originally Posted by blackhammer52 View Post
Joe,

I ordered and replaced the drain pump a little while back and things seemed to be improved.

The dishwasher ran great for the first few days, then slowly started to get bad again.

The first sign was that there was lots of water in the tub again after completing a wash cycle, the second sign was the wash cycle was taking longer again and the third sign was that our dishes were not as clean as they have been in the past.

While I had some time, I spent a little more time poking around. The drain lines seems to be free and clear of obstructions.

The water now is even slower coming out of the drain line than it was before. You said that the pump should move a lot of water out quickly--30-45 secounds to drain a full tub--right now, it takes almost 6 minutes to empty the tub.

While watching the dishwasher drain, when the pump stops, water will retreat back down the drain hose and back in to the tub. If I blow in to the drain hose, I can force the water out of the drain hose and back in to the tub (I can also blow bubbles in the tub with the drain hose).

Could my drainage woes be a check valve issue? I've removed/cleaned/checked/reseated the check valve, but have little improvement in drainage. Could the check vavle be improperly seated and be blocking drain and also not stopping backflow?

Hammer,

No, I would not expect the drain check valve in the pump to be a problem,

Unless you missed something, when you re installed it.



NOTE:
When replacing the check valve,
simply drop it in place. The inlet protector
will seat the flapper valve properly when it is
reinstalled.

I have seen the flapper get stuck open, due to debris, and crud in the pump. It doesn't sound like that's the problem.

A couple of things to re check,

Make sure the drain hose assembly, is secured to the top of the tub and drops backs down to the floor, then acroos and back up to the top of the sink cabinet,as high as possible, then to the drain connection.

Disconnect the drain hose from the pipe connection, and drain the dishwasher into a large bucket, under the sink, and time it.

I honestly think you have a drain problem, that the flapper and hose(install) can't compensate for.

You may want to consider an anti syphon("air gap") device,

Part number: AP3159420

Part number: AP3159420







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