Question about Maytag MTB1504ARS Top Freezer Refrigerator

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I have a Maytag MTB1504ARS the Freezer is not defrosting anymore.. I have to defrost it every couple just builds up with Ice (behind the inside cover) in less than 48 hours I had someone look at it, and he had me give him a deposit for 2 parts "defrost Heater" and a "Thermostat"..but he never bought the parts..and gave me a runaround about backorders etc..(hmmmm) I looked up the part "thermostat " (it's a lot cheaper than he put on the deposit receipt) but i dont see anything called a "defrost heater " for this model a couple of places online i see the defrost thermostat is also listed as defrost heater.. I need to just purchase the parts and do the replacement myself. 1. is there indeed 2 parts I need? 2. I think ive figured out that the thermostat is the little white rectangular part that is on the outside of the cover that houses the inner workings of the that correct 3. if there is a "defrost heater" what does that part look like, there aren't a lot of parts in the freezer... so i'm not sure what it could be Any help would be appreciated

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  • 2 Answers

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Posted on Jan 02, 2017

  • 878 Answers

SOURCE: Defrost problem folowup

bmurf, This adaptive defrost determined by compressor run time between defrost cycles. It could go up to 96 hours before defrost depending on differnt variables. With the unit running, a good frost on the evaportator and the tstat covered with frost or ice, unplug the refer. Pull the connector off the adaptive defrost board. On the harness, ohm from red to white/black stripe. If your tstat is good, you should read less than one ohm continuity. If it's bad, you probably will read around 240K ohms. This is the resistance of the resistor built into the tstat. On the live checks, plug in the refer. You are going to have 120VAC from Red to white. You also want to see 120V from white to white/black stripe. If you have that, the tstat is closed. If you have less than 120, say 96,100V. on white to red, that means you are dropping power through the 240K resistor built into the tstat. The board senses the tstat is open and no need to defrost. I hope this helps you out cat, thanks for the kind words on your post. Good luck, Catriver

Posted on Jul 27, 2007

  • 3361 Answers

SOURCE: Freezer not properly defrosting

On the adaptive defrost control board...cut the orange/white wire.
This will put the board into a standard 8 hour defrost cycle.

Posted on Mar 10, 2009

  • 520 Answers

SOURCE: Refrigerator started getting warm, but the freezer

I think I can help you here. Sounds like it is the internal refrigerator thermostat which should be located in the upper housing of the refigerator section. Changing it may be difficult for a DIY'er as there is a capillary tube that is very fragile and should be handled with extreme caution so as not to break it. As far as finding one, never call the manufacturer. They seldom have the parts you need. Try your local A/C and refigeration shop. Another option should your unit not have a thermostat would be a "clixon". This is a small disc shaped device attached to the cooling coil which will have two wires coming from it. A third option is be sure before you do anything that the coils are not frozen and iced over. If they are, unplug unit and do a manual defrost. Hair dryers work well for this. Be sure to have plenty of towels on hand for this can be a messy process. Hope this helps and good luck!

Posted on May 06, 2009

  • 4070 Answers

SOURCE: Ice build-up in lower freezer. We replaces the

If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.
How to check everything

check , defrost heater, defrost thermostat. If the heater and thermostat are ok it’ll be the adaptive defrost control. Part 13 in this diagram.

Posted on Sep 16, 2009

  • 1218 Answers

SOURCE: how do u access the defrost heater of the maytag

Good day,
You access it from the front removing the rear panel in the freezer compartment.

Note: the heater may have failed, but has a very low failure rate.
If the machine is not defrosting, the timer and defrost thermostat ( sometimes called a limiter) are just as if not more often the problem.

Posted on Nov 04, 2009

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1 Answer

Maytag refrigerator MTB1504ARS runs continuously

It looks like you have a defrost problem. It could be blocked air vents but I think there is a problem with either the drfrost heater or defrost thermostat. It cound be the defrst timer or control but i would check the heater and defrost thermostat first.

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If you found ice in the freezer then there is usually a lot more behind the back plate. If you let it defrost completely it should work good for a couple days until the ice builds up again. you more than likely have a deefrost issue. There are usually nthree components in a typical defrost circiut. The heater, defrost thermostat and a defrost timer or control. one or those is bad.

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Hello, My name Zoltan, and I have a Maytag

Your defrost element has failed in the freezer, ice has built up in the freezer cooling cores and air cant pass through them to the fridge, you need to defrost the unit totally and replace the elements, they are at the inside rear, behind the plate, also check your internal fan is running in the freezer, could be another fault. Russ

Jun 26, 2011 | Maytag Freezers

1 Answer

We are trading in our small MayTag refrigerator Model MTB1504AR made in Jul 2005 for a larger (22 cu ft) model. Can you tell me if the MTB1504AR was Energy Star Qualified?

I don't think so ... if your refrigerator is qualified , it must bear a yellow sticker with red stars of your rating on the front side itself.
Kindly rate my answer if you are satisfied or not. Thanks a lot . Good day to you . Deepak Richard

May 03, 2011 | Maytag MTB1504ARS Top Freezer Refrigerator

1 Answer

I have a Maytag 3 door ,freezer on the bottom, for the last 3 years every few weeks the fridge looses its coldness and the freezer is ice cold also it it always on temperature 1, so I have to unplug it...

Either, the defrost timmer has had it, or the freezer defrost element has failed, the element is the most common cause of this type of problem. You have ice build-up in the freezer cores because it cant defrost, all frostfree units rely on cold air from the freezer to blow into the fridge, if the freezer cores become blocked, air can not pass to the fridge side. I bet you, if you left the unit off for 2 days to defrost totally,,,,with the doors open...then plugged it back in, it would work like new for 2 weeks.
Timmer or defrost element needs to be not fall for the trick that the fridge mech. has to take it away, you tell him that this is the problem and you will save yourself ALOT of cash.

Dont forget to vote for the solution...regards Russ

Mar 08, 2011 | Maytag Freezer MQC2257BE

1 Answer

The freezer and the refrig is 41 degrees

Sounds like you are having a defrost problem. Look into the back o0f the freezer and see if you see a layer of ice building up on the back panel. If yes unplug and remove the rear panel and defrost with a hair dryer or a bucket full of hot water setting inside for a while. After you get the frost off of the evaporator I need you to inspect the defrost heater part number 63001049 and the defrost thermostat part number 63001051 The most likely problem will be the defrost timer 63001032 I need you to turn it slowly clockwise through a small opening inside the fresh food compartment until the compressor stops and leave like that for 25 minutes or until the compressor comes back on. During that time the refrigerator should be in defrost. Open the freezer door and listen for the sounds of sizzling or crackling. That should be the defrost taking place if you do the timer before removing the rear panel in freezer. If the compressor does not come back on simply turn the timer again slowly until it restarts and replace the defrost timer. That should get you going until you get parts and if this information has been helpful then please rate my solution, Thanks, Sea Breeze

Aug 31, 2009 | Maytag MTB1504ARS Top Freezer Refrigerator

1 Answer

Freezer all frosted

i have the same problem and the maytag repair man said 99% of the time its the auto defrost board. i ordered one from ebay for 32.02 and will let you know if it works when it gets here.

Jan 06, 2009 | Maytag Refrigerators

2 Answers

Refrigerator and Freezer not getting cold?

unplug the machine and let it completely defrost with the doors open overnight. then try it. if it still does not get cold then you know it is a more serious problem, like a compressor $300+
if it works for a couple days then freezes up again then you know it is a defrost problem, less serious problem <$100

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