4 replies to this topic

[GreenestOne]

I need to find out how a  temperature sensor in the refrigerator compartment is rated for this model. My understanding is that it should show a 

certain amount of ohms resistance at different temperatures.

The heating element shows continuity, and the defrost thermostat also showed continuity with the freezer at 6 degrees F. I don't know the 

temperature range of the defrost thermostat when it will open, but it should have operated to activate the defrost cycle before the coils iced over

(when I checked it, it was closed). So that leaves the temperature sensor malfunctioning or the main board has gone bad.

I don't want to replace the board if it could be the temperature sensor, or the defrost thermostat is bad even though it shows continuity.

 

So my request is really for a chart showing resistances for the temp. sensor. As always, I'm seeking advice from those whom have gone before. Thanks.

 

The freezer temperature was about 6 degrees F. when I got there and the fridge compartment about 48 F. Earlier in the day

the digital readout read  -13F in the freezer and  55F in the fridge, so the owner raised the temp. in the freezer and the readout showed -2F and a  corresponding 34F.in the fridge. However, my infared gun showed +6F and 47F. 

 

Does this indicate a bad sensor, a bad control board, or both?

[RegUS_PatOff]

can't rely on infrared guns .. they read the air temperature,

which would be colder if the Fan is blowing in cold Freezer air into the Fridge.

 

could use (2) of these

If you have a Harbor Freight Store near you,
 sometimes on sale for $ 2.99

[Samurai Appliance Repair Man]

can't rely on infrared guns .. they read the air temperature,

which would be colder if the Fan is blowing in cold Freezer air into the Fridge.

 

 

Correction:  Infrared guns read the temperatures of solid surfaces, NOT air temperatures, which is precisely why they are not suited for applications where knowing air temperature is vital, such as in refrigerated spaces or oven cells.  

 

For getting accurate air temperature data, use a K-type thermocouple.  Can do this with either a stand-alone instrument like the Fluke 52 or some multimeters have the ability to accept a K-type thermocouple input and read it on the Vdc scale as temperature.  

[certified tech group 51]

The best way is the put a glass of water on a middle shelf and insert the K-probe into the water, it takes time but it will give the best possible temps.....At the trade school the instructor  said "  ( if owner is not around )..Put the thermometer into the pickle jar, very fast and accurate, because it has  been sitting in the refer for a while"...................depending what is going on, I have held the probe tip in the air flow right at the damper, should be at /about  0 degs and colder......... then leave the probe some where near the middle shelf and do some paper work........................

[GreenestOne]

How about finding if the temperarture sensor is functioning properly.