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i also just bought the DA47-00243K bimetal thermostat for my samsung. i got it in the mail today and it is closed when it is at room temp. they are sending a replacement, but maybe it will also be closed at room temp. it must be a serious lemon?!
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Originally Posted by: Jorabi  I apologize for writing my original question backwards. It should have said:
I ordered and received a defrost thermostat and wanted to test it before putting it in. The circuit is closed (zero res) out of the box at room temp. I thoroughly froze it with spray until it was entirely covered with frost, and it stayed closed. I put it under a heat lamp and at 84F it stayed closed.
I returned it because I thought it was bad. I received a new one and it tests the same way. I was assuming that the thermostat should be open until it gets too cold, then should be closed, to turn the heater on. But these are always closed. How can I test if the open/close is working? Been trying to find somone else asking the same question for an hour tonight. I have a replacement Samsung Thermo Bimetal Da47-00243K and my continuity test at room temps is closed(beeps). So does the suspect Thermo I am replacing.
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Snap, I bought the wrong part. I was going by the 37TV31 stamped on it but I guess more than one thermostat uses that. The one I got was WR50X10068 instead of 10006. It says L140-30F and it does open if I heat it to 140 and closes when it cools down.
Thanks, I will have to exchange it for the correct part.
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Your model number is incomplete , but all the ones similar to yours took part WR50X10006 . It looks like it has L53-40F on the side. L is limit 53 degrees F is when it opens and shuts down the defrost element. -40 is the temperature it closes at. That is 53 - 40 = 13 degrees Fahrenheit. So it has to get to 13 degrees to complete the circuit for defrost . This part. GE WR50X10006 Thermostat Def - AppliancePartsPros.com
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I apologize for writing my original question backwards. It should have said:
I ordered and received a defrost thermostat and wanted to test it before putting it in. The circuit is closed (zero res) out of the box at room temp. I thoroughly froze it with spray until it was entirely covered with frost, and it stayed closed. I put it under a heat lamp and at 84F it stayed closed.
I returned it because I thought it was bad. I received a new one and it tests the same way. I was assuming that the thermostat should be open until it gets too cold, then should be closed, to turn the heater on. But these are always closed. How can I test if the open/close is working?
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It depends on the temp. range the defrost thermostat/cutoff is made for.
Most complete the circuit or close at a temp. around 10 degrees F or lower.
The best way to test one is put it in a deep freezer for 5 hours or so then check it for continuity. It would take a lot of freeze spay to chill one down.
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I ordered and received a defrost thermostat and wanted to test it before putting it in. The circuit is open (infinite res) out of the box at room temp. I froze it with spray just to see if it was backwards, and it stayed open. I put it under a heat lamp and at 84F it stayed open.
Then I returned it because I thought it was bad. I received a new one and it tests the same way. I was assuming that the thermostat should be open until it gets too cold, then should be closed, to turn the heater on. Am I mistaken?
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