Question about Refrigerators

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My evaporator, behind the fan and light fixture, in my Maytag refrigerator top freezer iced up and stopped the flow of cold air to the lower part of the fridge. I took it apart and defrosted it manualy. After talking to the store parts dept person I replaced the Defrost Timer (and the temp control while I was there) myself. The problem came back after a week or so. Do I have to "set" the defrost timer by turning the one way screw slot on the underside of the unit? It has a raised line on the unit as if to align it with the slot (in line with/90 degrees to?). It's accesible from inside the fridge.

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  • gilbert_ian Aug 25, 2010

    I fitted a new timer. Assume it is OK. If your solution does not work what else could it be.?

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Hi!!

You probably need the defrost timer to come on more often. If your timer is adjustable, set it on the middle, at 45 degrees and wait a week to see if it fixed the problem. If not, adjust accordingly waiting a week between adjustments.

Good Luck!! Don't forget to rate this post!!

Posted on Aug 25, 2010

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  • Master
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Hello,

A mechanical defrost timer controls the defrost cycle of the freezer. In older models, the timer runs continuously and roughly every six hours, cuts power to the cooling system and sends power to the defrost heater. In newer models the timer advances only while the compressor or defrost cycle is running - an improvement for efficiency. As the timer continues to advance, power to the heating element is cut and power is restored to the cooling system. If the timer does not advance, the appliance will be stuck either in defrost or refrigerate mode, resulting in, respectively, no cooling or frost build-up.

The defrost timer is usually found behind the front grill "toe kick" of the refrigerator. It may also be found behind a cover plate inside the refrigerator or freezer, in the temperature control console, or behind the refrigerator near the compressor. To test whether the defrost timer is simply failing to advance, locate the advance screw and turn it clockwise until you hear it click. This advances it to the next mode. If it was cooling before, it is now in defrost mode. Simply wait about 35 minutes and check whether it has left defrost mode and has resumed cooling (listen for the compressor). If it does not advance, the timer motor is probably bad and the entire timer needs to be replaced. If it advances as it should, then you can follow the steps below to test the switch electrically.
The timer is usually held in place with one or more screws. Remove the screws and gently pull the timer out far enough to disconnect the wiring connector. The connector can be removed by firmly pulling and rocking it left and right. It is not necessary to note the position of the wires because the connector plug is keyed so that it can be replaced in only one way.

Take care.

Posted on Aug 25, 2010

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Refrigerator section which is on the top is not cooling, however the lower freezer section is working and making ice. Fan in refrigerator section does not seem to be working. Maytag mod#mbf2254HEW


The fridge gets its cold air from the freezer through a vent(damper) between the freezer and fridge.The fan in the freezer blows air through it. Make sure this fan is running. The fan should spin freely when you spin it. You can check the fan plug for voltage to see if it's getting power with the door switch pushed in. You may have to hold the door switch in for it to run. There is a flap you adjust with the fridge temp. control. Make sure it's opening and closing when you adjust the fridge temp.
The problem could be the electronic control if you have one or the mechanical linkages.

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.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it'll be the control.

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1 Answer

Compressor is running all the time but temp does not come down. refridg is only cool,freezer is cold but ice machine also stopped working and a glass of water taked a few days to...


You may notice frost on the panel that covers the evaporator coil in the freezer. This is a tell tale sign of the coil being frozen up blocking air flow.
Inside the freezer compartment is where the evaporator coil is located. It is behind a cover that allows air to enter the bottom and then forced out the top by a small fan. You should be able to feel the air flow coming out the top. If no air flow the evaporator coil may be frozen and needs to be defrosted. There is a heater at the bottom of the coils which aids in this and may need to be replaced. A couple of screws usually holds the cover in place. Remove the cover and place a small fan in the door to aid in melting the ice. Do not apply heat of any kind ie hot water, blow dryer etc because this can over pressurize the coils and damage the system. The heater may look like a small light bulb. It can be checked with an ohm meter for continuity to see if it needs to be replaced.

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1 Answer

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This is a common problem, and worth fixing if the frig isn't to old. The frig is making cold air just fine, which is a plus! All we need to do is get that air to circulate throughout the entire appliance.

Behind the freezer wall is a fan called an evaporator fan. This fan simply blows the air straight up the back of the freezer. From here it enters the frig at the top left and sinks to the bottom. Then it re-enters the freezer and continues its loop :D

So, either the circulation is being obstructed by something (maybe ice build up), or the fan is out.

Behind the freezer wall is the evaporator fan (that has probably stopped moving). Either ice build up (or some obstruction) has stopped it, or it has just served its time and needs to be replaced. Generally I would just replace it. You never know if it has been damaged from ice blockage or whatever the problem may be. If the motor is trying to spin and it is being held in place, bearing could be wearing out or completely gone which will just cause you more pain in the near future. So replace that puppy and you should be all set! :D good luck!

P.S. Naturally, if the fan is fine but you have something blocking the air flow, just fix the air flow problem in an apppropriate manor :)

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1 Answer

My maytag refrig. is 3 years old. model #747908 HS520AS. freezer on bottom-refrig on top. the refrig part is not staying cold. have cleaned under frig and vaccumed back and underneath and it still is not...


Hi,

All the cooling coils for this model are in the freezer section. There is a fan down there behind the back wall on the top. This fan directs air up to the fresh food section.

Check the temperature of the freezer you can do this by inspecting the ice cream, if the ice cream is soft you are above 5 degrees F. If you have a good cold freezer then the problem is with air flow, the evaporator fan that I spoke of could be bad).

If your freezer temperature is not as cold as it should be you may have a defrost problem, look for any signs of frost build up on the back wall of the freezer section, if you see frost you will most likely need to put in a new control.

If the freezer temperature is warmer than normal and you do not have frost you may have a sealed system leak, this will require a technician for sure.

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2 Answers

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check the damper door located between the freezer and refrigerator compartments(this lets in the cold air from the freezer) and make sure it opens and closes with your temp adjustment in the refrigerator compartment,sometimes they ice-up and are frozen in one position then take a hair dryer and defrost the door

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2 Answers

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1 Answer

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if the freezer is getting cold the problem is due to the cold air from the freezer not getting into the refrigerator. There are several things that can cause this problem. The coils in the freezer icing up and not defrosting properly is one of the things that can cause the refrigerator not to get cold enough. Another problem is the fan that blows the cold air from the freezer compartment into the refrigerator, not working. When the compressor is running open the refrigerator's door and push the switch that makes the light go out. You should hear the fan blowing the cold air from the freezer into the refrigerator, when this switch is pushed in. If the fan is working then you will need to find what is blocking the air flow. Iced up coils are a common problem. The icing problem can be due to a defective defrost timer or something defective in the defrost circuit. Click here for more information. Check for these problems and let me know what you have found.
REFRIGERATOR TROUBLESHOOTING
#1 Refrigerator side getting warm Freezer still cold
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Defrost heater defective. See Defrost Diagnosis Procedure
Defrost thermostat defective. See Defrost Diagnosis Procedure
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Fan blade broken.
Defective door switch on older models.
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Condenser coil clogged.
Defective defrost timer. See Defrost Diagnosis Procedure
Defective defrost heater. See Defrost Diagnosis Procedure
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also if require more help click the link http://www.applianceaid.com/refrigerator.html please do rate the solution .thanks in advance.thank you for using fixya.

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1 Answer

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I just worked on a FF801W which is supposed to be very similar. The defrost heater in mine was of the glass tube type and located under the evaporator. There was a bimetal thermostat clipped to the top of the evaporator and a thermal fuse (sealed in a clear plastic tube) nearby. The connections were behind a little plastic cover (2 screws) in the back wall just above the evaporator.

Mine was iced up like yours and I had to defrost it with a hair dryer. All the defrosting parts in the freezer compartment turned out to work so I now suspect the defrost timer (down by the compressor). I've marked it and I'm waiting to see if it's turning.

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1 Answer

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The sound you hear could be the compressor relay, the evaporator fan or maybe something else. It could be bad, it could be not too bad. (Like a fan blade a bit unbalanced with dust)

OK,,, back to the evaporator. There is a little heater next to the coil that turns on every 8 hours or so to defrost the coil. That's called the "defrost cycle". Makes sense, no? If the defrost timer (common problem) or defrost control board (common problem) go bad, your evaporator coil freezes up, and that's not good for anything in your refrigerator. But it can often keep the freezer section cold. You can easily disassemble the evaporator cover in the back of the freezer and take a look. If it looks like a block of ice, you probably have a defrost issue. An even, thin coat of frost is OK, but lots of ice is a no no.

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1 Answer

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