Forum Discussion

Ivylog's avatar
Ivylog
Explorer III
Mar 01, 2014

Need help Norcold 1200 with a Amish cooling unit

Unit is not cooling well, 6-10 degrees on back wall of the freezer and fins above 34. By disconnecting the thermistor it will freeze things in the refer section in less than 20 hours. Had the correct new thermistor so installed it. Unit goes back to not cooling well with the above poor temps. In less than 8 hours with the thermistor disconnected it will be 0 or less in the freezer and the fins 28 or less in the refer section. Temp set on 9 and manually running the outside fans makes no difference. It's 75 or less out side and unit is in the shade. Any suggestions of what to do next is appreciated in advance. Thanks Dick B

PM sent to Doug Rainer and serial # 1156821
Class A

21 Replies

Show More
  • Executive45's avatar
    Executive45
    Explorer III
    Mar 01, 2014
    First thought is your back up thermistor is bad...the thermistor is nothing more than a thermostat. By disconnecting it the fridge simply continues to cool without ever shutting off. By nothing changing after replacement, tells me either your wiring is bad or the thermistor is bad or both. Verify you have voltage TO the thermistor. If yes, try another one. If no, trace the wiring to determine where the short is.....Dennis

    BTW...you should be able to get those temps in those conditions with a 3 or 4 setting. I usually have mine set at 2-3 and the ice cream is solid.....Dennis

About Motorhome Group

38,769 PostsLatest Activity: Apr 03, 2026