23rd Oct 2026
Norcold N15DC and N20DC Error Code E1: Fresh Food Thermistor
CODE E1
Norcold N15DC and N20DC Error Code E1: Fresh Food Thermistor
The fresh food temperature sensor isn’t reading properly. Usually it’s a loose plug, damaged wiring or a bad thermistor.
Before you start
- You’ll need a flashlight and a screwdriver to remove the sensor cover.
- Before unplugging anything turn the fridge off at the ON/OFF button and disconnect its 12V supply (or pull the two fuses under the fridge).
Fits these models
Norcold’s 12V DC compressor refrigerators (14.9 and 18.6 cu ft). These run on 12 volts only: no propane, no 120V heater.
What you’ll see
E1 blinking in the MODE display where the temperature setting (1 to 5) normally shows. It means the fresh food thermistor (temperature sensor) isn’t reading properly.
STEP 1
Restart the fridge
Touch and hold the ON/OFF button for 5 seconds to turn it off, then turn it back on. After it’s been off, the compressor waits 5 minutes before it starts again, so give it time before you judge.
Is the code still there?
Watch it for a day
It was likely a one-time glitch. If the code comes back, continue with Step 2.
STEP 2
Check the sensor connection
Turn the fridge off and disconnect 12V. Find the fresh food thermistor behind the internal fan cover inside the fresh food compartment and check that its plug is pushed fully into the wiring harness.
Is it connected properly?
Plug it in
Reconnect it firmly, power the fridge back on and check the code. If it’s still there, go to Step 3.
STEP 3
Inspect the wiring
Follow the sensor wire as far as you can. Look for pinched, cut, chafed or corroded wires and a loose connector.
Any damage?
Repair the wiring
Fix the damage, then check the code. If it’s still there, replace the thermistor.
Code still there after a new thermistor?
The control board may not be reading the sensor. Before buying a board, ask a tech to confirm.
Parts for this repair
Norcold Thermistor and Cover 640149View part →
Norcold Internal Fan Cover & Thermistor Housing 640928View part →
Norcold Control Board 641043 (N15DC / N20DC)View part →If the code stays after the thermistor and wiring check out, the main control board is the next suspect.
Still stuck? ask a tech with your model, serial number and the code or readings you got. We’ll confirm the part before you order.
Covers Norcold N15DC, N15DCSS, N15DCIMSS, N20DC and N20DCSS (12V DC compressor), fault code E1. Code meanings from the Norcold N15DC Series owner’s manual.