23rd Oct 2026
Norcold N15DC and N20DC Error Code E6: Ambient Thermistor
CODE E6
Norcold N15DC and N20DC Error Code E6: Ambient Thermistor
The ambient (room temperature) sensor isn’t reading properly. Usually it’s a loose plug or damaged wiring.
Before you start
- You’ll need a flashlight and a screwdriver.
- 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
E6 blinking in the MODE display. It means the ambient temperature probe, which tells the control how warm it is around the fridge, 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 plug and wiring
With the fridge off and 12V disconnected, find where the ambient probe plugs into the wiring and check that it’s fully seated. Follow the wire for pinches, cuts or corrosion.
Plug loose or wiring damaged?
Fix the connection
Reseat the plug or repair the wire, then check the code.
Replace the ambient sensor
The sensor itself is the likely cause. Ask a tech with your model and serial number and we’ll confirm the right sensor before you order.
Parts for this repair
Shop all N15DC and N20DC parts, or see the parts diagrams.
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 E6. Code meanings from the Norcold N15DC Series owner’s manual.