3 way Fridge freezing food when running on propane - 2019 320 S

@2Doxies, I have the same model year T@B 320 S as you.  Take a look at the resources for the refrigerator (left side of the forum pages under "User Manuals/PDF Files/Videos & Resources.")  Lots of good info can be found within those folders.  Here's a link that will take you to the refrigerator info.  I have a document at the bottom of that folder, which you may find helpful:

https://tab-rv.vanillacommunity.com/discussion/6390/norcold-refrigerator-manual-guidelines-tips#latest

In that document, I have included the following information under propane operation:

7.  Use the Propane Gas Control (294) to set the desired temperature setting.  Push and then turn the control knob to either the LO, MED, or HI setting.  HI is the coldest temperature setting.  These temperature settings are represented by a series of three flame symbols of progressively increasing size, displayed from left to right (i.e., clockwise) around the Propane Gas Control:  “LO” is the smallest flame symbol; “MED” is a medium-sized flame; “HI” is a larger-sized flame.  There is a fourth, even larger flame displayed adjacent to a power off symbol at the furthest clockwise point around the control knob.  This is the setting for turning the propane function “OFF” and is where the knob should be set when not operating the refrigerator on propane gas.

With a full, or nearly full refrigerator, you may find that the MED setting is a good setting to start with.  Over time, you will determine the best temperature control setting for proper cooling.  That setting will likely be impacted by the outside air temperature.  Norcold clarifies in the owner’s manual that, “This is not an automatic gas control.  It does not change the flame from high fire to low fire as with other RV refrigerators.  If the cooling load changes, you must manually change the gas control to maintain the same temperature inside the refrigerator.”  You may find it helpful to purchase a small refrigerator thermometer for monitoring the refrigerator compartment temperature.

Also, see the upper section of p. 5 of the Norcold owner's manual.  It has some suggestions for avoiding freezing issues.  Along with adjusting the propane thermostat setting, as needed, we keep lettuce on the bottom shelf of the refrigerator, which is consistent with Norcold's recommendation.

I thought the three way fridge on propane only had the three settings — high, med. and low, and the temp setting thermostat only worked on 12VDC of 120VAC?  If I got it wrong, thanks for the clarification.
cheers

(2018 320s) Us too, and we had the same freezing problem, Thanks for the link and infomation Bayliss 
We also put another shelf in the fridge that helps with separating the food. It was one that you buy to put in kitchen cupboards. We shortened the legs and replaced the caps. (sorry pics a bit big!)

@2manyplaces - Posted photos must be resized.  I highly recommend the app “Image Size“ to resize phone photos. - Sharon

Great Idea. I will add the extra shelf to keep my food off the ice block.

I have the same problem with freezing food especially when in Colorado with ambient temps ranging from 60's in the day to mid 20'sat night.  I got a remote Govee temperature monitor that connects via bluetooth to my phone so I can monitor temps even while towing without opening the refrigerator.  It even has high and low temp alarms that can be set and will give an message when temp varies above or below the set points.  The temperature monitor is great but doesn't solve the problem of controlling refrigerator temps.   The refrigerator really needs a thermostat to cycle the unit on and off on electricity or modulate the gas flow rate but it doesn't seem to have that feature.

Wow, I'm in the opposite camp, have not succeeded in getting the refrigerator to run on propane, much less freeze the food.  I have a lot of reading to do.