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Old 04-06-2018, 02:08 PM   #1
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Anyone know what this device is?

Attached to the fins of my refrigerator. I bought the MH used and still finding accessories installed by the previous owner.


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Old 04-06-2018, 02:12 PM   #2
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It’s a thermistor


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Old 04-06-2018, 02:19 PM   #3
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I believe it controls the temp of the frig. Mine slides up for colder.
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Old 04-06-2018, 02:20 PM   #4
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As Cliff said, it's the thermistor that works with the thermostat to sense and set the operating temperature of the fridge.

On most Norcold fridges it's placed on the 2nd or 3rd fin from the right side.
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Old 04-06-2018, 02:20 PM   #5
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It is what tells the main board how cold the fridge is. Moving it adjusts the temperature.
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Old 04-06-2018, 02:22 PM   #6
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Indeed, a thermistor.

A Thermistor is a simple resistance based thermal probe that changes resistance based on the temperature of the cooling fins in your refrigerator. The control board it is plugged into will read that resistance and turn on, or off, the cooling source as needed to maintain a constant temperature.

At least, that's how it's designed to work. They have been known to fail and could be a likely source of the problem if your refrigerator isn't cooling properly.

Pretty cool, huh?

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Old 04-06-2018, 05:27 PM   #7
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AS posted........thermistor which is the temp sensor used by the fridge thermostat to control cooling cycles (turn heat source on/off)

Some Norcold have it on 2nd/3rd fin from right and SOME have it on 10th fin from right
(Location is specific to model number)

Moving location of thermistor CAN affect overall temps (6*F-*8F) on those models that have "AUTO TEMP CONTROL" (non-adjustable temp setting on front panel)
Otherwise it has little to no affect .....moving temp setting is where adjustments are made.


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Old 04-09-2018, 10:32 AM   #8
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Thanks for the input everyone. My OLD Norcold didn't have one of these and this looks a little like it was an after thought or some kind of add on. I'll check the manual and read up on it's use.
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Old 04-23-2018, 02:45 PM   #9
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Looks like a Flux Capacitor...the kind the IRS uses to track you with.

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