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Open Roads Forum  >  Tech Issues

 > fidge temp too cold

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ezridn

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Posted: 12/20/11 09:47am Link  |  Print  |  Notify Moderator

demetic 2862 got the thermister at bottom of fin still freezing everything thanks


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Old-Biscuit

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Posted: 12/20/11 10:14am Link  |  Print  |  Notify Moderator

When thermistor goes bad.....unit defaults to 'cooling' mode.

You can check the thermistor.......unplug the two 2 pin connector on lower control board then stick bulb end of thermistor in glass of ice water approximately 33°F to 35°F. Wait 2 to 3 minutes. I think the range is approximately 7,000 to 10,000 ohms for good thermistor.

You can replace just the end (don't have to replace wiring) with a repair kit......don't have a link but Google search for Dometic Thermistor Repair Kit.

On Edit: Check for 12v DC power and that fuse is good on lower module
located on back of fridge

* This post was edited 12/20/11 10:59am by Old-Biscuit *

lanerd

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Posted: 12/20/11 10:50am Link  |  Print  |  Notify Moderator

Same symptoms with ours. Replaced the thermistor and all was good again.

ron


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danhercules

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Posted: 01/03/12 10:45am Link  |  Print  |  Notify Moderator

My refer freezes when plugged in and when on gas almost not cold enough. Is this a thermister issue or something else?


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snowdance

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Posted: 01/03/12 11:59am Link  |  Print  |  Notify Moderator

Freezing when plugged in is likley Thermister. Almost not on gas might be but not sure. Most work OK on gas and freeze on electric. But after near freezing being about right may seem warm.


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snowdance

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Posted: 12/20/11 12:13pm Link  |  Print  |  Notify Moderator

Like others said....

j-d

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Posted: 01/05/12 05:40am Link  |  Print  |  Notify Moderator

About to check a fridge for a neighbor here at a state park later today.

If it tests bad, has anybody figured out the generic replacement for the thermistor, something from a place like Radio Shack?

We're a little out of the way right now for getting to an RV dealer...


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j-d

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Posted: 01/05/12 03:45pm Link  |  Print  |  Notify Moderator

Tested the thermistor just now. 1700 ohms in ice water and 1300 ohms warmed in hands. The 1700 is clearly out of range, but what bothers me is that all I've read seems to point to a "failed open" or extremely HIGH resistance would cause the fridge to freeze, not extremely LOW resistance like I found. That's based on the 7000-100000 ohms for ice water noted in this thread.
So I wonder, Does the fridge go full bore when thermistor resistance is out of range either way, High --OR-- Low?

And... It looks like if I tie a string to the old thermistor and pull it through from outside, I should be able to pull a new one in from outside.
Is that right?

judelaurenzo25g

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Posted: 04/10/12 10:28pm Link  |  Print  |  Notify Moderator

The food in my Refer is also freezing I just put the thermistor in ice water for 10 mins. Then I tested the resistance in ohms on my meter. My meter is a cheap 20$ meter that will only let me set in 2K ohms and my reading was .549 With that said Im assuming that my actual reading is 5,490 meaning my thermistor is bad. Someone give me a hand with this reading.... Thanks!


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snowdance

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Posted: 01/05/12 04:10pm Link  |  Print  |  Notify Moderator

Or cut the old one and tape the new one to it and pull..
Both ways work.

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