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rheostat ? Maytag Side by Side  Rate Topic 
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 Posted: Tue Jul 6th, 2010 12:13 am
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Squeaky Clean
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   I need to replace this switch that is clipped to the evap coils and controls the defrost element, what would I ask for and what range? It does not have any numbers on this device and Sears only sells it with a new element.     

Model: PSD2450GRW

   

Last edited on Tue Jul 6th, 2010 12:37 am by Squeaky Clean

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 Posted: Tue Jul 6th, 2010 12:53 am
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kdog
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The defrost thermostat - comes as a kit with defrost heater RepairClinic part #1021756



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 Posted: Tue Jul 6th, 2010 01:18 am
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Squeaky Clean
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Yep, I'm aware its sold as a kit, but i was told if I took it took a parts house they could match one up for me (genaric part). I just dont see any numbers on this device as to what range I need?

Does anyone know why a t-stat would be needed in a situation like this, the timer goes into defrost every 8 hours or so, so why would you put a temp based cut out in a circuit like this? Seems like a silly waste of a part, if it was not cold and it goes into defrost, what would if hurt? At that point you have a major problem anyway (if the core is warm I mean) 

Last edited on Tue Jul 6th, 2010 01:24 am by Squeaky Clean

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 Posted: Tue Jul 6th, 2010 02:00 am
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kdog
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The purpose of the thermostat is to terminate the defrost cycle once the coils reach a predetermined temperature, usually the temperatures are printed on the thermostat, not sure why this one is not available seperately as most are. There may be an underlying reason for this (other than $$$$) - I would go with the Mfr suggested replacement



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 Posted: Tue Jul 6th, 2010 02:03 am
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I believe it opens at +43F and closes at +15F

it may be listed as something like  L43-28F     (open temperature, differential)

but I can't find any ..

 
but may cost more than the "kit"



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 Posted: Tue Jul 6th, 2010 02:12 am
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Thank you K-Dog.....I will pick one up at Sears in the morning. After your explanation, I can see why they feel there is a need for a temp sensor.....but I would say they could just build an average cut out (meaning average time it takes for the temp to drop into a specified range, once the compressor and fan cut out) into the timer fuction.....that would eliminate another part in the circuit that could fail. I just like to make things simple.           :)

 

   Reg-  Thank you, thats what I was looking for.

Last edited on Tue Jul 6th, 2010 02:13 am by Squeaky Clean

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 Posted: Tue Jul 6th, 2010 02:20 am
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Squeaky Clean wrote: ... average cut out (meaning average time it takes for the temp to drop into a specified range, once the compressor and fan cut out) into the timer fuction...

no, the Mechanical Timer doesn't know how much frost is on the Evaporator ..

would depend on how long the Compressor ran ...

external ambient temperature, how long Fridge/Freezer Doors were open, how much "warm stuff" you put into Fridge/Freezer, etc, etc ..

that's why they went to a Adaptive Defrost Control (ADC) on the electronic models.
(senses that stuff)
 



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 Posted: Tue Jul 6th, 2010 02:30 am
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Thank you Reg- I had no idea that was such a critical factor in keeping things cool and the evaporator defrosted. After I have defrosted everything and cleaned the drain, it is cooling like crazy tonight. I replaced the timer a few month ago, and it lasted a while till this week end. I have have had the fridge 8 years with no issues until the timer went, and now it froze up again.......it was frost on the cover (back wall) and mostly clear ice block surrounding the defroster, do you think the plugged drain cause my issues or that t-stat, working intermittently? 

P.S. My owners manual says that my condensor is factory sealed, and does not require cleaning? I tried to remove the kick plate and acess it to no avail......have you ever heard that on these Jenn air- Maytag units?  

 

Last edited on Tue Jul 6th, 2010 02:33 am by Squeaky Clean

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 Posted: Tue Jul 6th, 2010 03:52 am
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Squeaky Clean wrote: ... it was frost on the cover (back wall) and mostly clear ice block surrounding the defroster, do you think the plugged drain cause my issues or that t-stat, working intermittently? ...

don't know ... time will tell ...
 

Squeaky Clean wrote: 
.. My owners manual says that my condensor is factory sealed, and does not require cleaning? ...

from the PSD2450GRW Users Guide :

No Clean™ Commercial-duty Condenser

A clean condenser means more efficient refrigerator operation.
Thanks to the unique design of the No Clean™ condenser,
there is no longer a need for routine condenser cleaning in normal home usage surroundings.

Some operating environments may be particularly dusty or greasy.
In these situations, the condenser can be periodically cleaned to insure maximum efficiency.



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 Posted: Tue Jul 6th, 2010 04:07 am
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How do you get to the to that condenser?  It has a fixed toe kick panel, and I can not see it from the back?

  Should the defrost element kick on every time I hear the compressor and evap fan shut off or only on a eight hour cycle with the timer? It has shut off twice since I cleaned it up at 6pm (now its 10PM) and during that time I have never seen the coil light up?

             -Jon

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 Posted: Tue Jul 6th, 2010 04:11 am
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every 8 hours, and IF the Defrost Thermostat is +15 or colder ...

# 21 Cover on back of Fridge



 




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 Posted: Tue Jul 6th, 2010 04:24 am
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 I guess I thought the condenser was located on the bottom of the fridge horizontally, and would look like an AC condenser on a car or home system. I have totally cleaned & vacuumed that area behind that cover every 6 months.

 

P.S. So when does Summerfest start???

Last edited on Tue Jul 6th, 2010 04:25 am by Squeaky Clean

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 Posted: Tue Jul 6th, 2010 06:14 am
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Squeaky Clean wrote: ... P.S. So when does Summerfest start???

we do Wisconsin State Fair Aug 5 - Aug 15th

We don't do Summerfest ... too many "animals"  :)

Summerfest just ended,  11 days June 24 - July 4  w/fireworks



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 Posted: Tue Jul 6th, 2010 06:43 am
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After I have defrosted everything and cleaned the drain, it is cooling like crazy tonight.

*********************

If the EVAPORATOR COILS in the freezer compartment becomes blocked with heavy frost & ice (not defrosting), this prevents *airflow* from the freezer-to-the-refrigerator-back-to-the-freezer. Manually defrosting this snow/ice build-up will allow normal refrigeration for up to 2 weeks (depending upon heat & humidity) until it reoccurrs again because the automatic defrost has malfunctioned.

The evaporator FAN MOTOR pushes cold air from the freezer into the refrigerator fresh food compartment near the top shelf (coldest area of the refrigerator). This colder air filters down through the shelves to the crisper bins at the bottom (warmest area of the refrigerator).

Next, the air is pushed back into the freezer compartment at the bottom vent (warmest area of the freezer) and then filters through the evaporator coils where heat is removed from the air flowing thru it (cold always absorbs heat).

This cold air repeats the trip over to the refrigerator side by entering a vent near the top of the freezer--which is the coldest section of the freezer and is where the ICEMAKER ASSY is located. This top section is also the most ideal location for storing ice cream as the temperature required to keep it solid must be below 32F.

Defrost terminator and/or heater failure in a refrigerator is *not* uncommon.

 

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 Posted: Tue Jul 6th, 2010 06:52 am
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john63 wrote: ... through the evaporator coils where heat is removed from the air flowing thru it (cold always absorbs heat)....

aahh.. yes, someone that actually understands "heat"
(there is no such thing as "cold", it's the absence of "heat")



john63 wrote:
... storing ice cream as the temperature required to keep it solid must be below 32F...

IceCream ...below 32F .. I would hope so ... :)



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 Posted: Tue Jul 6th, 2010 07:11 am
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Also, if the thermostat wasn"t there, what of your fridge (and house) should the timer stick during the defrost cycle ?



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 Posted: Tue Jul 6th, 2010 01:11 pm
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Morning,

  Thank you both for your helpful information, it is very much appreciated!

   Reg- Have a cream puff for me! I sure miss all those great Wisconsin treats! We just got our first Culver's Frozen Custard down here in TN, it opened this week end......people from the midwest were lined up around the block, and the locals just scratched their heads wondering whats the big deal about another "icecream shop".......well learn em!

 

    

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 Posted: Tue Jul 6th, 2010 05:44 pm
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Squeaky Clean wrote: .. the locals just scratched their heads wondering whats the big deal about another "icecream shop ...

:icecream:



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