Question about Tappan 18 in. MDR251RE Built-in Dishwasher

1 Answer

Dishwasher won't drain after having replaced sink


Everything I have read is about when you put in a new disposal. I bought a new sink but put the old disposal on it. It was only 2 years old. As soon as I did, the DW stopped draining. Tonight I thought to run the drain cycle and let it drain into the cycle. It drains perfectly ~ until I reattach it to the disposal. Obviously that plug can only be knocked out once. When I look in the disposal outlet place, it is about half inch deep and then has a metal plate about the size of a dime. I don't know how the water gets by but it was draining fine until I switched it out and back.

I have a Badger 5. Can anyone give me a suggestion?

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  • 40 Answers

Sounds like it may be a dime.LOL Take a scewdriver and gently tape this metal piece .To the left or right,up or down.See if it moves.

Posted on Dec 05, 2007

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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For Miele Dishwasher G2470SCVI Need help with remaining water in the bottom. Model# G2470 SCV1 SF Type-HG03. Runs through the entire cycle,long,short ect..everything is clean and dishes look great but


see this causes and fix it. God bless you
Belt, Water Pump Although few dishwashers have a water pump belt, if the dishwasher won't drain there might be a worn or broken water pump belt. After removing the lower kick panel the motor can be seen in the front, the water pump belt is on the bottom of the motor.

Drain Pump If the dishwasher won't drain, the drain pump might be defective. Test the pump motor with an Ohm meter. Drain pumps are not repairable, if it's defective it will need to be replaced.

Drain Impeller The drain impeller is attached to the pump and pushes the water out of the dishwasher, through the drain tube and into the garbage disposer or drain line. If the dishwasher won't drain, the drain impeller might be broken or worn out. Replace both the impeller and seal at the same time.

Drain Solenoid Kit If the dishwasher won't drain, the drain solenoid kit might need to be replaced. The drain solenoid is an actuator that opens a flap to allow the water to drain.
Drain Valve The drain valve can get clogged with debris and should be cleaned out if the dishwasher won't drain. If it seems clear of debris but won't actuate, it will need to be replaced. The drain valve is not repairable.
Pump and Motor Assembly If the dishwasher won't drain, the pump and motor assembly might be defective. If the motor runs during the drain cycle, check for a blockage in the drain line. If the motor won't run during the drain cycle or if it just hums when it should be running, the pump and motor assembly might need to be replaced.

Clogged or Improperly Installed Garbage Disposer If the dishwasher won't drain and the garbage disposer was installed recently, the installer might have forgotten to knock out the drain plug from this disposer. All garbage disposers are sold with a solid plug in the drain tube for situations where a dishwasher isn't connected. However, if the dishwasher is connected, the plug will need to be removed. If the disposer wasn't replaced recently, remove the dishwasher drain hose from the disposer and clean out both the fitting on the disposer and the end of the drain hose. These are the most common places to find an obstruction if the dishwasher won't drain.

Drain Hose If the dishwasher won't drain the drain hose might be clogged. Remove the drain hose from both the dishwasher and the sink drain to clean it out. The most common place for an obstruction is at the garbage disposer.

Check Valve If the dishwasher won't drain the check valve might be stuck closed. The check valve is a small plastic device which prevents water from returning to the dishwasher after it has drained. If the valve gets stuck closed, it will prevent the water from draining. The check valve is the device that the drain hose is attached to on the dishwasher
Check Ball If the dishwasher won't drain the check ball might be stuck. The check ball is a small plastic ball in the check valve which prevents water from returning to the dishwasher after it has drained. If the ball gets stuck, it will prevent the water from draining also. The check valve is the device that the drain hose is attached to on the dishwasher.

9_29_2012_12_23_59_pm.gif9_29_2012_12_24_31_pm.jpg

Sep 28, 2012 | Dishwashers

1 Answer

Making a metal grinding sound when turns on but dont feel any forks or spoons in it


Garbage disposals can get noisy and sound like they're eating spoons instead of banana peel.
You can put vacuum hose in sink opening and see if something is in there.
As long as disposal disk rotates freely, and disposal is not shaking around and causing pipes to leak, then you can use it until it dies.
Otherwise, the bearing is probably rusted, or something is loose. Disposals rust out and eventually freeze, or the motor slows down and overheats, or they rust a hole and water leaks under sink.

Garbage disposal mechanism cannot be disassembled for repairs.
Here are basic disposal parts:
1) Sink basket that connects to sink and is held with 3 screws from below.
2) Disposal body which connects to sink basket using metal ring.
3) Rubber washer between disposal and sink basket.
4) Dishwasher connects to upper part of disposal with a hose.
5) Electric wire coming from disposal switch connects to disposal near red reset button.
6) Tubular drain pipe connects to side of disposal

I wrote tips for replacing disposals that you can use when disposal gives out.
When I worked apartment maintenance, we replaced disposal with same brand and size disposal.
That way we didn't have to change out sink basket or move pipes around under the sink.
How to: Disconnect 2 nuts on p-trap and trap falls loose.
Rotate steel connector disk that holds disposal to sink basket, and disposal comes off.
Before installing new disposal.
Attach electric wire to new disposal, and push in reset button.
Attach dishwasher tube to new disposal. Knock out plug inside dishwasher opening.
Lift new disposal up into place, and attach to old sink basket.
There is a rubber washer between disposal and sink basket, Use new washer.
Attachment ring catches at three points, all three have to connect.
You can use bottle jack to lift disposal if you have problem.
Re-assemble tubular pipe.

geno_3245_222.jpg
If this is your home, you want new sink basket that comes with new disposal because it looks shiny and new.
Buy a tub of plumbers putty also.
Remove old sink basket and clean sink opening.
Put finger-size roll of plumbers putty around sink opening, and then push new strainer basket into plumbers putty.
Tighten basket from below, wipe away excess putty around sink opening.
Install new disposal as described above.

geno_3245_223.jpg

Tips for tubular pipes:
When taking apart tubular pipes, start at p-trap and take apart as few pieces as needed to do job.
On image above, loosen both upper and lower nuts, trap falls loose, and then work on disposal.
Any tubular drain pipe that gets moved while working under sink needs to be disassembled, cleaned and re-assembled.
Metal pipes have rubber washer >> always use new rubber washers.
Plastic pipes have plastic washers > plastic washers can be cleaned and re-used.
Plastic washers have flat side that goes toward nut, tapered side away from nut.

geno_3245_221.jpg

When reassembling tubular pipe, we use rectorseal on washers and joints.
Slap a good amount on washer just before pushing washer in place and attaching nut.
Rectorseal will ensure tubular drain pipes won't leak.

Add a comment for more free help.
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For a price, fixya expert speaks with you over phone while you work on disposal.

Jan 08, 2011 | Ace Hardware InSinkErator Badger 5, 1/2 HP...

2 Answers

One of the grinder broke inside the unit, is this a replaceable part?


If disposal has loose parts inside, you have to replace the disposal.
If disposal still work and doesn't vibrate and loosen pipes under sink, then it's ok.
The don't sell replacement parts for disposals.

I wrote tips for replacing disposals:

When I worked apartment maintenance, we replaced disposal with same brand disposal.
That way we didn't have to change out sink basket or move pipes around under the sink.
How to: Disconnect 2 nuts on p-trap and trap falls loose.
Rotate steel connector disk that holds disposal to sink basket, and disposal comes off.
Before installing new disposal.
Attach electric wire to new disposal.
Attach dishwasher tube to new disposal. Knock out plug inside dishwasher opening.
Push new disposal up into place, and attach to old sink basket.
Use new connector washer.
Attachment ring catches at three points, all three have to connect.
Re-assemble tubular pipe.

geno_3245_211.jpg

If this is your home, you want new sink basket that comes with new disposal because it looks shiny and new.
Buy a tub of plumbers putty also.
Remove old sink basket and clean sink opening.
Put finger-size roll of plumbers putty around sink opening, and then push new strainer basket into plumbers putty.
Tighten basket from below, wipe away excess putty around sink opening.
Install new disposal as described above.

geno_3245_213.jpg

Tips for tubular pipes:
When taking apart tubular pipes, start at p-trap and take apart as few pieces as needed to do job.
On image above, loosen both upper and lower nuts, trap falls loose, and then work on disposal.
Any tubular drain pipe that gets moved while working under sink needs to be disassembled, cleaned and re-assembled.
Metal pipes have rubber washer >> always use new rubber washers.
Plastic pipes have plastic washers > plastic washers can be cleaned and re-used.
Plastic washers have flat side that goes toward nut, tapered side away from nut.

geno_3245_214.jpg

When reassembling tubular pipe, we use rectorseal on washers and joints.
Slap a good amount on washer just before pushing washer in place and attaching nut.
Rectorseal will ensure tubular drain pipes won't leak.

Jan 01, 2011 | Ace Hardware InSinkErator Badger 5, 1/2 HP...

1 Answer

My in-sink-erator model 5-81 is just over 2 years old and is leaking from the sides whether it's running or not. Is there anything I can do or do I need to contact a professional>


Find out exactly where leak is coming from.
You say water is coming from the side... is that where the pipe connects? Then take apart pipe and reassemble pipe using instructions below, and use rectorseal on joints as described below..
Is water coming from where dishwasher connects to disposal? Then tighten the clamp.
Is water coming from top where disposal connects to sink? Run paper towel around top to check for moisture, and then use steps below to dissemble disposal and re-install same disposal.
Is water coming from a rusted hole in disposal. Then replace disposal using steps below:

Here are the disposal steps:
When I worked apartment maintenance, we replaced disposal with same brand disposal.
That way we didn't have to change out sink basket or change pipes.
How to: Disconnect p-trap and tailpiece going into disposal.
Rotate connector disk clockwise that holds disposal to sink basket.
Before installing new disposal.
Attach electric wire to new disposal.
Attach dishwasher tube to new disposal. Knock out plug inside dishwasher opening.
Push new disposal up into place, and attach to old sink basket with new connector disk.
Use new connector washer.
Re-assemble tubular pipe.

geno_3245_201.jpg

If this is your home, you want new sink basket that comes with new disposal because it looks shiny and new.
Buy a tub of plumbers putty also.
Remove old sink basket and clean opening.
Put finger-size roll of plumbers putty around sink opening, and then push new strainer basket into plumbers putty.
Tighten basket from below, wipe away excess putty around sink opening.
Install new disposal as described above.

geno_3245_202.jpg

Tips for tubular pipes:
When taking apart tubular pipes, start at p-trap and take apart as few pieces as needed to do job.
On image below, loosen both upper and lower nuts, trap falls loose, and then work on disposal.
Any tubular drain pipe that gets moved while working under sink needs to be disassembled, cleaned and re-assembled.
Metal pipes have rubber washer >> always use new rubber washers.
Plastic pipes have plastic washers > plastic washers can be cleaned and re-used.
Plastic washers have flat side that goes toward nut, tapered side away from nut.

geno_3245_203.jpg

When reassembling tubular pipe, we use rectorseal on washers and joints.
Apply good amount on washer just before pushing washer in place and attaching nut.
Rectorseal will ensure tubular drain pipes won't leak.

Add a comment

Dec 29, 2010 | Ace Hardware InSinkErator Badger 5, 1/2 HP...

1 Answer

Leaking from the bottom of the disposal in the connection area.


Disposals rust out and need replacement.

Check a couple things first.
Run paper towel around top of disposal to see if moisture is leaking from around sink basket or dishwasher hose connection. Then check where tailpiece connects on side of disposal.
If these places are dry, the disposal has probably rusted out.

I wrote instructions for disposal replacement:

When I worked apartment maintenance, we replaced disposal with same brand disposal.
That way we didn't have to change out sink basket or change pipes.
How to change disposal: Disconnect p-trap and tailpiece going into disposal.
Rotate connector disk clockwise that holds disposal to sink basket.
Before installing new disposal.
Attach electric wire to new disposal.
Attach dishwasher tube to new disposal. Knock out plug inside dishwasher opening.
Push new disposal up into place, and attach to old sink basket with new connector disk.
Use new connector washer.
Re-assemble tubular pipe.

geno_3245_175.jpg

If this is your home, you want new sink basket that comes with new disposal because it looks shiny and new.
Buy a tub of plumbers putty also.
Remove old sink basket and clean opening.
Put finger-size roll of plumbers putty around sink opening, and then push new strainer basket into plumbers putty.
Tighten basket from below, wipe away excess putty around sink opening.
Install new disposal as described above.

Tips for tubular pipes:
When taking apart tubular pipes, start at p-trap and take apart as few pieces as needed to do job.
On image below loosen both upper and lower nuts, trap falls loose, and then work on disposal.
Any tubular drain pipe that gets moved while working under sink needs to be disassembled, cleaned and re-assembled.
Metal pipes have rubber washer >> always use new rubber washers.
Plastic pipes have plastic washers > plastic washers can be cleaned and re-used.
Plastic washers have flat side that goes toward nut, tapered side away from nut.

geno_3245_176.jpg

When reassembling tubular pipe, we use rectorseal on washers and joints.
Apply good amount on washer just before pushing washer in place and attaching nut.
Apply rectorseal where lower p-trap comes together.
Rectorseal will ensure tubular drain pipes won't leak.

geno_3245_177.jpg
Add a comment

Dec 12, 2010 | Ace Hardware InSinkErator Badger 5, 1/2 HP...

1 Answer

Garbage Disposal is about 2-1/2 years old It is now no longer grinding up potato peels and clog every time! HELP--do we need a new one!!!


1/2 horsepower is the lighter weight model, and if you use it heavily, then it will not work like before.
Another thing to consider is whether the water is draining away completely while you're cutting.
If water and potato peels are both present, your p-trap and tubular drain may need to be cleaned.

geno_3245_162.jpg

Let's go through the whole thing: replacement, p-trap, tubular pipes, everything.

When I worked apartment maintenance, we replaced disposal with same brand disposal.
That way we didn't have to change out sink basket or move pipes around.
How to replace disposal body: Disconnect both nuts on p-trap. Remove p-trap and loosen tailpiece going into disposal.
Rotate connector disk clockwise that holds disposal to sink basket.
Before installing new disposal.
Attach electric wire to new disposal.
Attach dishwasher tube to new disposal. Knock out plug inside dishwasher opening.
Push new disposal up into place, and attach to old sink basket with new connector disk.
Use new connector washer.
Re-assemble tubular pipe.

geno_3245_163.jpg

If this is your home, you might want new sink basket that comes with new disposal because it looks shiny and new.
Buy a tub of plumbers putty also.
Remove old sink basket and clean opening.
Put finger-size roll of plumbers putty around sink opening, and then push new strainer basket into plumbers putty.
Tighten basket from below, wipe away excess putty around sink opening.
Install new disposal as described above.

Tips for tubular pipes:
When taking apart tubular pipes, start at p-trap and take apart as few pieces as needed to do job.
On image above, loosen both nuts on p-trap, trap falls loose, and then work on disposal.
Any tubular drain pipe that gets moved while working under sink needs to be disassembled, cleaned and re-assembled.
Metal pipes have rubber washer >> always use new rubber washers.
Plastic pipes have plastic washers > plastic washers can be cleaned and re-used.
Plastic washers have flat side that goes toward nut, tapered side away from nut.

geno_3245_164.jpg

When reassembling tubular pipe, we use rectorseal on washers and joints.
Apply good amount on washer just before pushing washer in place and attaching nut.
Rectorseal will ensure tubular drain pipes won't leak.

Add a comment

Dec 10, 2010 | Ace Hardware InSinkErator Badger 5, 1/2 HP...

1 Answer

While using our garbage disposal this afternoon, it went from grinding to humming. The blades do move freely, but the plate is very loose and tips. Is it possible to tighten the plate?


There is no way to tighten plate that I know of.
Maybe a clever welder could stick it back together, but the problem implies something underneath is rusted out or broken. The main thing is the cutter plate, and if disposal wobbles, it will loosen drain pipes under sink and cause dripping.

I wrote some tips for installing new disposal, and include them here since disposal will be replaced at some point.

When I worked apartment maintenance, we replaced disposal with same brand disposal.
That way we didn't have to change out sink basket.
How to replace disposal:
Disconnect p-trap and tailpiece going into disposal.
Rotate connector disk clockwise that holds disposal to sink basket.
Before installing new disposal.
Attach electric wire to new disposal.
Attach dishwasher tube to new disposal. Knock out plug inside dishwasher opening.
Push new disposal up into place, and attach to old sink basket with new connector disk.
Use new connector washer.
Re-assemble tubular pipe.

geno_3245_145.jpg

If this is your home, you want new sink basket that comes with new disposal because it looks shiny and new.
Buy a tub of plumbers putty also.
Remove old sink basket and clean opening.
Put finger-size roll of plumbers putty around sink opening, and then push new strainer basket into plumbers putty.
Make sure there's enough putty that it squeezes up all around sink basket.
Tighten basket from below, wipe away excess putty around sink opening.
Install new disposal as described above.

geno_3245_144.jpg
Tips for tubular pipes:
When taking apart tubular pipes, start at p-trap and take apart as few pieces as needed to do job.
On image above, loosen both upper and lower nuts, trap falls loose, and then work on disposal.
Any tubular drain pipe that gets moved while working under sink needs to be disassembled, cleaned and re-assembled.
Metal pipes have rubber washer >> always use new rubber washers.
Plastic pipes have plastic washers > plastic washers can be cleaned and re-used.
Plastic washers have flat side that goes toward nut, tapered side away from nut.

When reassembling tubular pipe, we use rectorseal on washers and joints.
Apply good amount on washer just before pushing washer in place and attaching nut.
Rectorseal will ensure tubular drain pipes won't leak.

geno_3245_146.jpg

Add a comment

Dec 06, 2010 | Ace Hardware InSinkErator Badger 5, 1/2 HP...

1 Answer

Badger 1/2 hp in sink erator (garbage disposal) steady stream leaks from the bottom near the reset button. It appears to be coming from a drain outlet (a small hole, dia. approx size of smallest screw ),...


You might be able to buy time filling hole with epoxy or silicone caulk and let dry for 2 days.
10-year old garbage disposal had a good run.
Disposal will need to be replaced at some point.

When I worked apartment maintenance, we replaced disposal with same brand disposal.
That way we didn't have to change out sink basket.
How to: Disconnect p-trap and tailpiece going into disposal.
Rotate connector disk clockwise that holds disposal to sink basket.
Before installing new disposal.
Attach electric wire to new disposal.
Attach dishwasher tube to new disposal. Knock out plug inside dishwasher opening.
Push new disposal up into place, and attach to old sink basket with new connector disk.
Use new connector washer.
Re-assemble tubular pipe.

If this is your home, you want new sink basket that comes with new disposal because it looks shiny and new.
Buy a tub of plumbers putty also.
Remove old sink basket and clean opening.
Put finger-size roll of plumbers putty around sink opening, and then push new strainer basket into plumbers putty.
Tighten basket from below, wipe away excess putty around sink opening.
Install new disposal as described above.
geno_3245_113.jpg

Tips for tubular pipes:
When taking apart tubular pipes, start at p-trap and take apart as few pieces as needed to do job.
On image below, loosen both upper and lower nuts, trap falls loose, and then work on disposal.
Any tubular drain pipe that gets moved while working under sink needs to be disassembled, cleaned and re-assembled.
Metal pipes have rubber washer >> always use new rubber washers.
Plastic pipes have plastic washers > plastic washers can be cleaned and re-used.
Plastic washers have flat side that goes toward nut, tapered side away from nut.
geno_3245_112.jpg


When reassembling tubular pipe, we use rectorseal on washers and joints.
Apply good amount on washer just before pushing washer in place and attaching nut.
Rectorseal will ensure tubular drain pipes won't leak.
geno_3245_114.jpg

Nov 26, 2010 | Ace Hardware InSinkErator Badger 5, 1/2 HP...

1 Answer

We bought a new dishwasher because the old one wasn't draining all the way. Same problem with the new one?


The pump is a motor which runs in one direction to spray water in the dishwasher to clean and the opposite direction to drain the water. The problem could be from a clog or kink in the drain hose. Several years ago the drain line would connect to the sink garbage disposal. If the garbage disposal is not draining or the dishwasher connection to the garbage disposal is restricted or clogged the dishwasher will not drain. Under the sink, look at the garbage disposal to see if a rubber hose is connected at the side of the disposal unit. If a hose is connected to the side of the disposal, remove the hose clamp and check for any restrictions from garbage in the inlet or hose. You can use a screwdriver to clean the fitting to the garbage disposal and a wire hanger to free any restrictions in the hose. If the dishwasher does not connect to the garbage disposal it should connect to the sink trap. This is more common with new dishwashers because they have built-in disposals. Disconnect the drain hose from the sink trap and the dishwasher and look for a clog at the sink connection. The dishwasher inlet should have an angled piece of plastic or metal facing downward to prevent the waste from the dishwasher from spraying up into the sink. Do not get to aggressive with the cleaning in order to prevent breaking the angled piece of plastic or metal. Look for any kinks in the hose and try to run water through the hose, but do not use the sink which you removed the drain line from or it could leak under the cabinet. If you see a bad kink replace the hose with a new one. I hope this works and you find the problem without a great deal of time or trouble.

Nov 22, 2010 | Whirlpool GU2400XTP Built-in Dishwasher

1 Answer

I have whirlpool dishwasher model dp840 it is one week old it not draining water everything else seems to work


Where is the drain hooked up? is there an obstruction where it drains into sink. You will have to remove drain line where it runs into drain under sink and see if line is clear. I have seen where they dump into the disposal and they never removed the disposal plug

Oct 21, 2009 | Whirlpool 24 in. DP840D Free-standing...

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