True Refrigerator Error Code E2: LAE Probe T2 Failure

What does True error code E2 mean?

On an LAE control, E2 means probe T2 is not reporting. T2 is the defrost or coil probe, the sensor that tells the control the evaporator has warmed enough to end a defrost. It matters on models such as the T-49-HC and the GDM-26-HC. If it stops reporting, defrost may run longer or shorter than it should. Over days that can leave ice on the coil, warm product, or water in the drain pan. The cabinet itself may keep cooling in the meantime, which is why the code is easy to ignore until frost builds up. A technician checks the probe mounting on the coil, the lead where ice or the heater may have damaged it, the plug at the control, and last the T2 input on the board.

Affected models and control systems

True cabinets with an LAE control, such as the T-49-HC and GDM-26-HC. T2 is the defrost or coil probe.

Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.

What you may notice

• E2 on the display
• Heavy frost on the back wall
• Water in the drain pan or on the floor
• Product slowly warming over days

Possible causes

Listed in True's documentation

• The T2 probe mounting on the evaporator coil
• Probe lead damaged by ice or by the defrost heater
• The plug and terminals at the LAE control
• The T2 input on the board

Other likely causes — what usually sits behind error code E2 on this control. A technician confirms which one it is before any part is replaced.

• A probe pulled loose from the coil so it senses air instead of the fins
• A heater lead overheating the probe wire nearby
• Ice encasing the probe tip so it never sees the coil warm

Safe checks before calling for service

How a technician diagnoses error code E2

1. Confirm the control is an LAE and the code is E2.
2. Inspect the T2 probe position on the evaporator and its lead.
3. Measure the probe resistance against the expected value.
4. Check the plug and terminals at the control.
5. Test the defrost heater and run a manual defrost.
6. Replace the probe after verifying the heater and drain are sound.

How error code E2 differs from similar codes

E2 on a Danfoss ETC display means sensor 2, which feeds the defrost decision there; here it is the LAE T2 probe.

Technical reference

Document

Commercial Refrigeration General Control Guide TEC_TM_001 Rev C, LAE p.110 Display Code Definitions

Edition

TEC_TM_001 | REV. C | EN, 09/3/2025, P#811072

Models / control

LAE control

Section

Electronic Control (with Display) - Display Code Definitions: Carel p. 74, Danfoss ERC/ETC p. 87, Dixell p. 96, LAE p. 110

Checked

October 2026

We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.