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11-05-2013, 10:06 AM
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#1
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Winnebago Camper
Join Date: Feb 2013
Posts: 6
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frig not getting cold
Have norcold n821 frig in 99 Itasca 35. The freezer will freeze water over nite, however the bottom frig will not get cold, showing about 60 degrees, anyone have an idea whats going on. It does this on gas and electric? thanks
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11-05-2013, 10:19 AM
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#2
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Winnebago Camper
Join Date: Mar 2012
Location: Weston, Fl.
Posts: 10
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Quote:
Originally Posted by rfonte649
Have norcold n821 frig in 99 Itasca 35. The freezer will freeze water over nite, however the bottom frig will not get cold, showing about 60 degrees, anyone have an idea whats going on. It does this on gas and electric? thanks
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Check that the thermistor is firmly attached to the cooling fins inside the refer. about 1/3 the way up from the bottom of the fin.
__________________
2003 Newmar Kountry Star 3905, Freightliner XC chassis with CAT 330. Winnie the black lab, pretty Airbus captain wife, retired airline pilot with 11 grandkids. UH-1 pilot (Huey) U.S. Army 1967-1983. RVN 68-69. Northern Idaho my summer home.
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11-05-2013, 10:47 AM
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#3
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Winnebago Camper
Join Date: Feb 2013
Posts: 6
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moved the thermistor around the other day. No difference, could the thermistor be the problem?
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11-05-2013, 02:11 PM
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#4
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Winnebago Camper
Join Date: Mar 2012
Location: Weston, Fl.
Posts: 10
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Quote:
Originally Posted by rfonte649
moved the thermistor around the other day. No difference, could the thermistor be the problem?
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Yes. Disconnect it and see if the refer starts cooling better. It could freeze up refer contents. Check it after a few hours
__________________
2003 Newmar Kountry Star 3905, Freightliner XC chassis with CAT 330. Winnie the black lab, pretty Airbus captain wife, retired airline pilot with 11 grandkids. UH-1 pilot (Huey) U.S. Army 1967-1983. RVN 68-69. Northern Idaho my summer home.
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11-05-2013, 04:07 PM
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#5
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Winnebago Camper
Join Date: Feb 2013
Posts: 6
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Thanks will try that in am.
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11-05-2013, 04:20 PM
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#6
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Winnebago Camper
Join Date: Mar 2012
Location: Weston, Fl.
Posts: 10
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Quote:
Originally Posted by rfonte649
Thanks will try that in am.
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When I say disconnect I mean totally unplug it from the circuit. If you leave it plugged but removed from fins, the test will be invalid. Hope it helps.
__________________
2003 Newmar Kountry Star 3905, Freightliner XC chassis with CAT 330. Winnie the black lab, pretty Airbus captain wife, retired airline pilot with 11 grandkids. UH-1 pilot (Huey) U.S. Army 1967-1983. RVN 68-69. Northern Idaho my summer home.
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11-05-2013, 09:01 PM
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#7
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Winnie-Wise
Join Date: Mar 2005
Location: San Diego County, CA
Posts: 303
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Had the same problem. Replaced the thermistor (it's does not cost much to replace) problem solved!
__________________
Steve & Leslie
Winnebago 2007 Adventurer 38T
Honda 2010 CR-V "Toad"
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11-06-2013, 05:46 AM
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#8
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Winnebago Camper
Join Date: Feb 2013
Posts: 6
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Steve and Leslie where did u unplug the thermistor at?
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11-06-2013, 08:30 AM
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#9
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Winnebago Owner
Join Date: May 2003
Location: Smyrna
Posts: 58
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I admit to not knowing much but I would really appreciate it if one of you could give a bit more info on the Thermistor. I have a similar problem (cools to low 40's) but would like to be colder. What does the Thermistor look like and can it be removed with out removing any thing else. Thanks
__________________
Life's a Journey Enjoy the Ride. Had a 39 ft. Journey now I have a 24 ft short Fuse.
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11-06-2013, 08:33 AM
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#10
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Winnie-Wise
Join Date: Mar 2005
Location: San Diego County, CA
Posts: 303
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Quote:
Originally Posted by rfonte649
Steve and Leslie where did u unplug the thermistor at?
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On our Norcold 1200 (I think this maybe a different model than yours). There is an inside light at the top center of the refer box. Remove the cover. The plug for the thermistor is there.
__________________
Steve & Leslie
Winnebago 2007 Adventurer 38T
Honda 2010 CR-V "Toad"
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11-06-2013, 08:42 AM
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#11
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Winnie-Wise
Join Date: Mar 2005
Location: San Diego County, CA
Posts: 303
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Quote:
Originally Posted by slick60
I admit to not knowing much but I would really appreciate it if one of you could give a bit more info on the Thermistor. I have a similar problem (cools to low 40's) but would like to be colder. What does the Thermistor look like and can it be removed with out removing any thing else. Thanks
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Ours is black in color, about 1 1/3" long, has two wires an a clip and is located on the "grill" cooling blades in the back. Held on to the grill by the clip. It is removed from the light at the top center of the inside refer box. It is plugged into the light. The light cover needs to be removed. It is an easy end user fix.
__________________
Steve & Leslie
Winnebago 2007 Adventurer 38T
Honda 2010 CR-V "Toad"
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11-06-2013, 09:31 AM
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#12
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Winnebago Owner
Join Date: May 2003
Location: Smyrna
Posts: 58
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Theristor
Found the Thermistor and unplugged it. Will give it a couple of hours and see if there is any difference.
Thanks of the replies.
__________________
Life's a Journey Enjoy the Ride. Had a 39 ft. Journey now I have a 24 ft short Fuse.
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11-07-2013, 02:59 AM
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#13
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Winnebago Master
Join Date: Sep 2007
Posts: 724
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Quote:
Originally Posted by slick60
Found the Thermistor and unplugged it. Will give it a couple of hours and see if there is any difference.
Thanks of the replies.
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do a forum search. there is a lot of info about the thermistor including how to move it on the fins to make the temp colder.
__________________
01 WINNEBAGO 35U W20.8.1L SW Wa, Hi. Good Sam, SKP. AMSOIL fluids. BANKS ecm program. SCAN GAUGE II w/ Ally temp. 2 LIFELINE GPL-6CT AGM Batts on their sides. TST tptts. K&N panel air filter. AERO mufflers. TAYLOR plug wires. ULTRA POWER track bar. KONI fsd shocks, toad '14 smart car
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11-07-2013, 04:11 AM
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#14
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Winnebago Owner
Join Date: Mar 2012
Location: Fulltime RVer
Posts: 212
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thermistor
Quote:
Originally Posted by calhyatt
When I say disconnect I mean totally unplug it from the circuit. If you leave it plugged but removed from fins, the test will be invalid. Hope it helps.
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What your saying is if we un plug the thermistor all together the fridge will get colder with out it?
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11-07-2013, 07:28 AM
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#15
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Winnebago Owner
Join Date: May 2003
Location: Smyrna
Posts: 58
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Unplugged the thermister, waited 2+ hours and temp was down 10 degrees. Ordered a new one yesterday. Thanks.
__________________
Life's a Journey Enjoy the Ride. Had a 39 ft. Journey now I have a 24 ft short Fuse.
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11-07-2013, 07:59 AM
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#16
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Winnebago Camper
Join Date: Mar 2012
Location: Weston, Fl.
Posts: 10
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Quote:
Originally Posted by slick60
Unplugged the thermister, waited 2+ hours and temp was down 10 degrees. Ordered a new one yesterday. Thanks.
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You are welcome. Happy to help
__________________
2003 Newmar Kountry Star 3905, Freightliner XC chassis with CAT 330. Winnie the black lab, pretty Airbus captain wife, retired airline pilot with 11 grandkids. UH-1 pilot (Huey) U.S. Army 1967-1983. RVN 68-69. Northern Idaho my summer home.
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11-07-2013, 08:11 AM
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#17
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Registered User
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 196
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Quote:
Originally Posted by homeless
What your saying is if we un plug the thermistor all together the fridge will get colder with out it?
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Only if the thermistor is your problem. There could be many other reasons for the fridge not being at the proper temperatures.
Without the thermistor in the circuit, the fridge goes into Backup Operating System mode, BOS, which is where the cooling unit runs flat out and will only turn off or defrost on time versus temperature of the fins.
Backup Operating System (BOS)
The backup operating system (BOS) is an electronically controlled duty cycle. It maintains the refrigerator in operation if the thermistor is
disconnected or fails. The BOS maintains cooling by controlling the heat source selected. When the refrigerator is operating in BOS, the length of the cooling cycle is regulated by time rather than regulated by temperature.
To accomplish this, the BOS adjusts the length of the cooling cycle according to the temperature setting selected by the user; the higher the temperature setting, the longer the cooling cycle. For example, if
the temperature setting is set to 5, raising the setting to 6 will lengthen the cooling cycle, making the cabinet colder.
When a warmer temperature is desired, changing the temperature setting to a lower number shortens the cooling cycle. For example, if the temperature setting is set to 6, lowering the setting to 5 will shorten the cooling cycle.
Dr4Film ----- Richard
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11-08-2013, 04:02 AM
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#18
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Winnebago Owner
Join Date: Mar 2012
Location: Fulltime RVer
Posts: 212
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So what should be the proper temp if the thing is working right? Moving the thermistor up and down the proper fin will change the temp? Why would we need it if with out it things are the way we want?
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11-08-2013, 04:16 AM
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#19
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Winnebago Master
Join Date: Sep 2007
Posts: 724
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Quote:
Originally Posted by homeless
So what should be the proper temp if the thing is working right? Moving the thermistor up and down the proper fin will change the temp? Why would we need it if with out it things are the way we want?
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yes, moving the thermistor will change the fridge temperature and somewhat change the freezer temperature.
ideally, i would like my freezer temp to be near 0 degrees and my fridge temp to be 33-34 degrees.
when set to 4, the best i can do so far is 33-34 in the fridge with about 8 degrees in the freezer.
my freezer does make 4 trays of ice cubes in tupperware trays in about 36 hours and it keep ice cream hard.
__________________
01 WINNEBAGO 35U W20.8.1L SW Wa, Hi. Good Sam, SKP. AMSOIL fluids. BANKS ecm program. SCAN GAUGE II w/ Ally temp. 2 LIFELINE GPL-6CT AGM Batts on their sides. TST tptts. K&N panel air filter. AERO mufflers. TAYLOR plug wires. ULTRA POWER track bar. KONI fsd shocks, toad '14 smart car
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11-08-2013, 04:48 AM
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#20
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Winnebago Owner
Join Date: Nov 2009
Posts: 70
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Here is a Thermistor test to try. Generally, when the freezer is at or below freezing and the fresh food section is significantly warmer the cooling unit is failing - which could be the result of an internal blockage in the tubing or it has compromised itself and has begun leaking coolant.
__________________
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified
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