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- > Do-It-Yourself Appliance Repair Help > The Kitchen Appliance Repair Forum > HELP!!!! Warm air blowing into refrig, Freezer side cold

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HELP!!!! Warm air blowing into refrig, Freezer side cold  Rating:  Rating
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 Posted: Sun Dec 30th, 2007 04:02 pm
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ub4me
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I have a Maytag MZD2766GEW refrigerator that blows warm air instead of cold air into the cool side, but the freezer side is cold and works fine. Is there a stuck valve I can fix or replace?

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 Posted: Sun Dec 30th, 2007 05:52 pm
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jambatt
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Start here.

 

http://fixitnow.com/wp/2007/11/29/the-complete-diy-refrigerator-repair-reference/



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 Posted: Sun Dec 30th, 2007 09:13 pm
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ub4me
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Thanks for your reply Jambatt.

The article is good but doesn't solve my problem. This morning there was hot air blowing into the refrigerator and yet the freezer was as cold as it is supposed to be. The freezer appears to be blowing lots of cold air into the duct leading to the fresh food side but only a trickle of cold air comes out into the fresh food section. I suspect that the thermostat which controls the cold air to the fresh food side of my refrigerator is bad. I don't know how to confirm it. It is held in place by two phillips screws. I can get the front screw out but the back screw is hard to get out because there is a filter mount in the way which has rigid plastic pipes going to it that make it difficult to move.

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 Posted: Sun Dec 30th, 2007 11:34 pm
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appl.tech.29501
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go into the frige side and look alog the left hand wall, start at the top and work your way down. You will see a small window roughly 2inches by 4 inches covered with a grate usually. This is your air return make sure nothing is sitting in front of it or blocking it, also check to make sure that it isn't frozen over......postback.



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 Posted: Mon Dec 31st, 2007 01:45 am
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ub4me
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Air intake is clear.

I have removed the incoming air damper mechanism so cold air comes into the fresh food side unobstructed to see if it reaches temperature of 40 degrees. I suspect that the thermostatically controlled damper may be bad.  What I can't figure out is why there was warm air coming into the fresh food side this morning.

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 Posted: Mon Dec 31st, 2007 12:33 pm
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jambatt
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 Need to know temps in freezer and ff side. Is there ice build up on the back wall of the freezer? Does it blow warm air all the time or does it alternate between warm and cold? Is evaporator fan running when the warm air is coming in? Probably gonna be more questions, but since we can't see it ourselves we have to get you to paint us a picture with words. Sounding more like a defrost heater problem as we proceed. Yours appears to have the adaptive defrost board so troubleshooting is going to be more complicated.



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 Posted: Mon Dec 31st, 2007 03:39 pm
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ub4me
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There is some frost on the right side of the condenser coils but not in the freezer compartment. It only blew warm air once sometime in the ealy morning hours yesterday. I don't know if the evaporator fan was running when that occured. What could cause warm air to blow into the FF section? Is it usually the defrost heater? I didn't see anything blocking the return air vent at the bottom of the FF side, but if it were blocked somehow would that cause hot air to blow inside or just stop the air from blowing?

It seems to only blow cold air now. I have had the air damper leading to the FF side off and the FF side gets to 40 degrees. I have a repair manual for the frige and I am trying to take apart the top section to determine if the damper control is functioning. Any help from you would be greatly appreciated.

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 Posted: Mon Dec 31st, 2007 10:36 pm
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jambatt
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There is some frost on the right side of the condenser coils but not in the freezer compartment. It only blew warm air once sometime in the ealy morning hours yesterday.
OK. Let's watch the temp in the FF side for the next 24 hrs. How long did the warm air blow? How long did it take FF side to cool back down to 40? The warm air may have been a result of the unit just finishing up the defrost cycle or the defrost cycle may have not terminated at the proper temp. If FF side does not maintain 40 degrees then we will have to have a look at the evaparator coil.



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 Posted: Tue Jan 1st, 2008 04:29 pm
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ub4me wrote: There is some frost on the right side of the condenser coils but not in the freezer compartment.

The condenser coils are down by the compressor so, where is the frost on the condenser coils exactly?  Is it at the dryer, or at the large copper tube that comes out of the refrigerator wall and goes to the compressor?  

You may have a restriction, or the evap fan may not running sometimes.  The system could be frosting all the way back down the suction line, or the dryer could be restricted and that is what is frosting up.  More information is need for us to tell exactly what is going on.  Good luck.

Himeros

 

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 Posted: Tue Jan 1st, 2008 06:04 pm
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ub4me
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I don't know how long hot air was blowing into the FF section since it was blowing when I got up in the morning. It melted our butter.

I have disassembled the control housing at the top of the FF section. I removed the air damper control and tested it by marking the rod 1/4 inch from the housing then submerging the capilary coil into ice for 20 minutes to see if the rod moved. It didn't, so I suspect that this part is defective and I have ordered a new one. Right now I have the air duct leading to the FF section from the freezer open about 20% and it seems to keep the FF section about 40-45 degrees. It took about 5 hours to reach this temp last night but I may have not been allowing enought air in from the freezer since I am manually regulating it. I could have cooled the FF side faster with more air flow but I didn't want the freezer to get too warm and I was concerned the compressor would run even longer to get the freezer cold. The freezer temp has always been fine. The cycle times seem relatively normal this way. I am hoping once I get a new damper control that my problems will be solved. I am concerned that I might get a repeat of the hot air if there is a defrost problem component as well.

Himeros: I think I mistated that there was some frost on the condenser coils. I guess the coils inside the freezer at the back are called evaporator coils. The evaporator fan (inside the freezer) seems to run consistently whenever the freezer is cooling.

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 Posted: Tue Jan 1st, 2008 06:10 pm
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Pegi
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Be sure the lights are not staying on in the food compartment when the door is shut also?? If not this would sure melt the butter...



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