U-Line Freezer (L) (R) Evap T Short: Evaporator Sensor Shorted
(L) (R) Evap T Short tells you the left or right evaporator thermistor circuit on a U-Line freezer is shorted, so the control cannot trust that coil temperature reading.
What does U-Line freezer code (L) (R) Evap T Short mean?
(L) (R) Evap T Short is a sensor message for a U-Line freezer. The evaporator thermistor reports how cold the coil is on the left or right side, and the L or R on the display shows which. A shorted circuit means current is taking a shortcut, usually through damaged insulation, a failed sensor or moisture, so the reading is not a real temperature. The freezer may still cool, but the control is missing a signal it uses for that side. Defrost moisture around a frozen coil makes this a place where dampness matters.
(L) (R) Evap T Short at a glance
- Code
- (L) (R) Evap T Short
- Appliance
- U-Line freezer
- Applies to
- U-Line digital-control freezers, left or right coil sensor
- Type
- Needs attention soon
- Can you clear it yourself?
- Sometimes, after the safe checks below
- Most likely cause
- A thermistor wire that is pinched, crushed or worn through
What you may notice with (L) (R) Evap T Short
- (L) (R) Evap T Short appears on the display
- The named side may show more frost than usual
- Water may drip near the back or base
- The freezer still feels cold but cycles differently
How the freezer detects (L) (R) Evap T Short
The evaporator thermistor in a freezer is a small temperature sensor clipped to the cold coil. Its resistance rises as the coil gets colder. The control measures the voltage across it and translates that into a coil temperature for the left or right side.
When the circuit is shorted, resistance drops to almost nothing and the voltage collapses. The control knows that no coil could produce such a reading, so it flags the problem instead of acting on bad information. It then shows (L) (R) Evap T Short. A pinched wire, a damaged sensor or water at the connector can each do this, and the coil region is where cold, frost and meltwater all meet.
Likely causes of (L) (R) Evap T Short
- A thermistor wire that is pinched, crushed or worn through
- An evaporator sensor that has failed shorted
- Moisture or ice on the connector that bridges the pins
Can you keep using the freezer with (L) (R) Evap T Short?
You can usually keep the freezer running while you arrange a repair, since the zone sensors still protect the temperature. Check the inside with a freezer thermometer daily. If you find standing water near electrical parts, switch off the breaker and stop using the unit. If food begins to thaw, move it to another freezer and follow USDA and FDA guidance on refreezing and safe temperatures.
What you can safely check
- Cut power to the freezer at the outlet before you look around the unit, since water and power must stay apart.
- Check for water or ice dripping near the back or bottom on the named side.
- Wipe up any visible moisture with a dry cloth.
- Restore power after about a minute and watch the display. If (L) (R) Evap T Short returns, leave the panels closed and call us.
What our technician does for (L) (R) Evap T Short
- Inspect the evaporator thermistor wire on the named side for pinches or damage
- Check the connector for ice or moisture
- Measure the sensor resistance to confirm a shorted reading
- Swap the sensor or mend the wiring
How to keep (L) (R) Evap T Short from coming back
- Wipe up spills and meltwater promptly at the base of the freezer
- Do not use sharp tools to scrape frost near the back wall where the sensor wire runs
- Keep the door gasket clean and sealed so humid air does not freeze on the coil
- Where humidity is high, such as a garage or lanai in Florida, keep the unit's base dry
Technical reference
- Code
- (L) (R) Evap T Short
- Appliance
- U-Line freezer
- Control family
- U-Line digital-control freezers, left or right coil sensor
- 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 freezer error codes
(L) (R) Evap T Short questions
What does a shorted evaporator sensor mean?
Current is bypassing the sensor and the control reads almost no resistance. That number is not possible for real coil temperatures, so the control flags a wiring or sensor problem.
Can ice cause (L) (R) Evap T Short?
Yes, ice or meltwater at the connector can bridge two contacts and mimic a short. The area around an evaporator is damp during defrost, so this is one thing a technician checks.
Should I defrost the freezer myself?
Do not chip at the coil or the back wall. Leave that to a technician, who can reach the sensor without damaging the coil.
Is (L) (R) Evap T Short worse than the Open version?
Not necessarily. Both mean the control cannot read the coil temperature. Short points to touching wires, damaged insulation or moisture, while Open points to a break or loose connector.
Does (L) (R) Evap T Short mean a gas or refrigerant leak?
No. The message concerns only the sensor circuit. A refrigerant problem would appear as a loss of cooling rather than a wiring reading, and a technician checks both if cooling drops.
Need help with (L) (R) Evap T Short?
A technician finds the cause at your bar or lanai and puts the price in writing before any part comes out.