U-Line Beverage Center E2 (Class Series): Second Sensor Open
E2 on a Class Series UHWC524, or on a 1000 or 2000 Series cabinet, means the control sees no signal from Thermistor 2. The unit stays powered but cannot use that reading.
What does U-Line beverage center code E2 (Class Series) mean?
In the error table for the Class Series UHWC524, as well as the 1000 and 2000 Series, E2 stands for an open Thermistor 2. The control picks up nothing from the second temperature sensor and puts the code on the display. The unit stays powered, and the message remains until the sensor reading comes back. The 1215BEV and the 2224DWR carry the identical entry, so the code reads the same on all of them. In the meantime, temperature control leans on the readings that are still available.
E2 (Class Series) at a glance
- Code
- E2 (Class Series)
- Appliance
- U-Line beverage center
- Applies to
- U-Line Class Series UHWC524 beverage center
- Type
- Needs attention soon
- Can you clear it yourself?
- Sometimes, after the safe checks below
- Most likely cause
- Thermistor 2 has an open circuit inside the sensor
What you may notice with E2 (Class Series)
- The code E2 sits on the display instead of a temperature
- The cabinet continues to run and cool
- Temperature seems less steady than it used to be
- A separate thermometer reads differently from the display
How the beverage center detects E2 (Class Series)
Inside a U-Line beverage center, thermistors tell the control how warm the cabinet air is. A thermistor is a sensor whose resistance rises and falls with temperature, and the control reads that resistance continuously while the unit has power. Thermistor 2 is the second sensor in the list of inputs the control keeps for these cabinets.
When the sensor or its wire has an open circuit, no current passes and the control receives nothing from that input. Nothing about that is a temperature, so the control records an open reading and shows E2. The unit does not stop, since other inputs are still available, but a piece of information it normally uses has gone. The message stays on the display for as long as the second sensor stays silent.
Likely causes of E2 (Class Series)
- Thermistor 2 has an open circuit inside the sensor
- A sensor wire or connector has broken or worked loose
- The control board is not picking up the sensor input
Can you keep using the beverage center with E2 (Class Series)?
The cabinet generally keeps cooling with E2 posted, so unplugging it right away is not necessary. Since one reading has gone missing, though, the control can miss its target slightly. Place a thermometer inside and check it several times over a day. If drinks are warming, or the cabinet seems to run nonstop, switch it off at the breaker and have the sensor circuit tested.
What you can safely check
- Turn the cabinet off and pull the plug, or switch off its breaker, before touching anything.
- Give it a minute, then power it back up.
- Clear space behind and beside it so air can circulate.
- Put a thermometer inside and compare it with the display.
- Keep clear of wiring and leave every panel on.
- If E2 comes back, contact us.
What our technician does for E2 (Class Series)
- Measure Thermistor 2 for an open circuit
- Inspect the sensor wire and connector for breaks or looseness
- Check the control board input when the sensor and wiring test good
How to keep E2 (Class Series) from coming back
- Keep the area behind and beside the cabinet clear so the sensors read real air temperature.
- Avoid yanking the cabinet in and out of its opening, which can stress wiring at the back.
- Wipe condensation or spills near the rear before they reach connectors.
Technical reference
- Code
- E2 (Class Series)
- Appliance
- U-Line beverage center
- Control family
- U-Line Class Series UHWC524 beverage center
- 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 beverage center error codes
E2 (Class Series) questions
Does the Class Series UHWC524 show E2?
Yes. Its table lists E2 for an open Thermistor 2, with identical entries for the 1000 and 2000 Series. The wording is the same from series to series.
What actually removes E2?
A restart handles a one-time glitch. When the sensor circuit really is open, E2 comes back shortly after, and the path from sensor to board has to be tested.
Could E2 spoil what is stored inside?
It depends on how long the control goes without the reading. Put a thermometer in the cabinet, follow it for a day, and have the unit looked at if the numbers move away from the setting.
Does E2 mean something different on other series?
No. Whether the cabinet is a Class, 1000 or 2000 Series model, E2 reports Thermistor 2 as open. Only the model number on your label changes from one to the next.
What should I have ready when I describe E2 by phone?
Read out the model number from the label inside the cabinet, say that E2 is on the display, and tell us whether the cabinet still feels cold. That lets us prepare the right test.
Need help with E2 (Class Series)?
A technician finds the cause at your bar or lanai and puts the price in writing before any part comes out.