RV Trip Planning Discussions

Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 09-20-2020, 12:12 PM   #1
Senior Member
Join Date: Nov 2013
Posts: 324
What is this weird little sensor on my fridge?

I recently replaced the old Dometic cooling unit in my fridge with a new Amish unit. In the process I found this strange little temperature sensor attached to the back of some of the sheet metal between the control board and the burner.

It wasn't connected to anything and it doesn't appear to have been connected to anything in ages.

I haven't found a whole lot online that tells me much except that it is somehow related to Lennox, which I've always thought of as an AC and Heating brand.

I found one on eBay:

The temperature range it measures looks to be 70-15 degrees. Maybe it's some kind of trigger for an ambient heater to help the fridge when it's really cold?

Any wild guesses?
Attached Thumbnails
Click image for larger version

Name:	funky_switch.jpg
Views:	6
Size:	53.0 KB
ID:	301662  
Full -Time On The Road
2008 Tiffin Allegro Open Road 35QBA
6.7L Cummins ISB Tuned to 300HP
deprived is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-20-2020, 05:54 PM   #2
Senior Member
Join Date: Nov 2015
Posts: 13,458
YES it is an 'ambient air temp sensor'
Part of a 'cold weather kit'\
Norcold even has an OEM part number
Heat tape is wrapped around the 'weak ammonia' line to add in coolant flow during cold temp operations
Dometic doesn't have a 'cold weather' kit per se. They have a Low Ambient Temp Switch on some models that bypasses Light switch so food compartment light stays on ...provides a 'heat source' that allows for longer heating cycles/Dometic suggests turning it off above 50*F

Previous owner probably bought after market kit or Norcold Kit

Heat tape wrapped on BLUE Line
Is it time for YOUR Medication or Mine?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
Old-Biscuit is offline   Reply With Quote
Old 09-21-2020, 12:56 AM   #3
Senior Member
Join Date: Nov 2013
Posts: 324
Originally Posted by Old-Biscuit View Post
YES it is an 'ambient air temp sensor'
No kidding? I got it right? That's a first.

My fridge also had an additional high-temperature switch above the gas burner, which was apparently part of a Dometic recall campaign at some point. I went ahead and transferred it over to my new Amish unit but maybe that isn't necessary seeing that it's an entirely new cooling unit.

As for the ambient switch, I'm wondering if I shouldn't take advantage of having one and adding some kind of 12v heat tape to the weak ammonia line.

Anyway, thanks for the reply. Very cool.
Full -Time On The Road
2008 Tiffin Allegro Open Road 35QBA
6.7L Cummins ISB Tuned to 300HP
deprived is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Weird inverter reading little help please FLYING BUTCH Monaco Owner's Forum 12 11-22-2016 08:22 AM
Norcold fridge N841 - Suspicious, weird, or what? wanderinf350 RV Systems & Appliances 9 07-26-2013 06:44 PM
Fridge acting weird machman72 RV Systems & Appliances 3 05-10-2007 03:00 AM

All times are GMT -6. The time now is 01:20 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.