U-Line 1000/2000 Series Wine Cooler E2: Second Sensor Open
E2 on 1000 and 2000 Series U-Line wine coolers means Thermistor 2, the second temperature sensor, is open. Its shorted partner is E6, and charts from other platforms may list E2 differently.
What does U-Line wine refrigerator code E2 mean?
Whenever E2 appears on a U-Line cooler in the 1000 or 2000 Series, Thermistor 2 is open. The second temperature sensor has a broken circuit, so the control has no reading from it. You may find charts that attach another meaning to E2, but for these series it is a sensor reading. The matching code for a shorted Thermistor 2 is E6.
E2 at a glance
- Code
- E2
- Appliance
- U-Line wine refrigerator
- Applies to
- U-Line 1000 Series and 2000 Series wine coolers
- Type
- Needs attention soon
- Can you clear it yourself?
- Sometimes, after the safe checks below
- Most likely cause
- Thermistor 2 has opened up inside
What you may notice with E2
- E2 is displayed where the temperature normally appears
- The inside may feel warmer or cooler than the setting
- The doors close well, so the cause is not a door
How the wine refrigerator detects E2
Wine coolers of this type track temperature through several thermistors, each wired back to the control. Thermistor 2 is the second one. The control feeds it a small signal and turns the response into a temperature it can act on.
When the circuit to Thermistor 2 is open, the signal never completes its loop. The control reads that as a missing sensor and shows E2. A cut or pinched lead, a connector that no longer touches or the sensor itself can all produce the same open reading, so the display is a starting point rather than a verdict. Older material attached a different meaning to this code, which is why the series matters when you read it. The shorted version of this sensor appears as E6.
Likely causes of E2
- Thermistor 2 has opened up inside
- The lead to the second sensor is damaged
- The sensor connection has worked loose
Can you keep using the wine refrigerator with E2?
Only with care. The control cannot read Thermistor 2, so it may not hold the zone it covers at the setting you chose. Keep a separate thermometer in the cabinet and look at it often. If the reading stays steady, the cooler is coping for now. If it moves, take the wine out to a cooler spot and leave the cooler off until it is examined.
What you can safely check
- Switch the power off at the plug, wait a minute and restore it.
- Place a thermometer in the cabinet so you know the real temperature.
- Dry any moisture you can see at the back of the cooler.
- Keep all panels in place.
- If E2 returns, call us.
What our technician does for E2
- Check Thermistor 2 with a meter to confirm it is open
- Separate the sensor from its wiring and test each one
- Replace only the part that fails, then run the cooler to see that E2 stays away
How to keep E2 from coming back
- Wipe away spills at the back of the cabinet before they reach the sensor wiring.
- Move the cooler gently, since a pulled lead can open a sensor circuit.
- Keep the cooler out of spots where water drips or splashes onto the rear.
Technical reference
- Code
- E2
- Appliance
- U-Line wine refrigerator
- Control family
- U-Line 1000 Series and 2000 Series wine coolers
- Maker documentation
- U-Line owner manuals and support
- Checked
- November 2026
Code meanings come from the maker’s documentation and our own repair work; we do not reprint the maker’s document. Confirm the full model number before acting on a code. We are an independent repair company, not affiliated with U-Line Corporation.
Related U-Line wine refrigerator error codes
E2 questions
What is E2 reporting on my cooler?
Thermistor 2, the second temperature sensor, has an incomplete circuit. The control therefore ignores that sensor, because it has no usable signal from it.
Another source gave E2 a different meaning. Which is correct?
Charts written for other platforms use E2 differently. For 1000 and 2000 Series U-Line coolers the code means Thermistor 2 open, and that is the reading used for diagnosis.
Where does E6 fit next to E2?
E6 belongs to the same sensor. E2 means its circuit is open and E6 means it is shorted, so each one describes a separate condition of Thermistor 2.
Could E2 be left over from an old chart?
Charts from other platforms did use E2 differently. For 1000 Series and 2000 Series coolers the reading is Thermistor 2 open, so it is worth confirming your model series before trusting a chart.
Will E2 disappear if the cooler is restarted?
A restart can clear the display for a while. If the circuit is still open, the control sees the same condition again and shows E2 once more.
Need help with E2?
A technician finds the cause at your bar or lanai and puts the price in writing before any part comes out.