Perlick Bar Refrigerator Error Code E2: Evaporator Probe Error

What does Perlick error code E2 mean?

The evaporator is the cold coil at the back of the cabinet, and frost builds on it as the compressor runs. The digital controller manages defrost using a probe on that coil, and on the chiller models defrost runs automatically every four hours. The controller reads the coil probe to know when to start and when the coil has cleared. When that probe is missing or reads outside a believable range, the controller flashes E2. Without a good coil reading, defrost can no longer be judged properly, frost can accumulate, airflow across the coil drops, and the cabinet slowly warms during busy service. Drinks near the front or on the upper shelves may warm up first. The maker lists a loose evaporator probe plug on the controller, a damaged evaporator probe wire, heavy frost on the coil, and a defrost that does not clear ice from the coil. The last two may be a result of the first two, or may be separate. The compartment probe has its own code, E1.

Affected models and control systems

This applies to Perlick HB, HC and HD 24-inch undercounter refrigerators with the digital controller, per the Z2363 troubleshooting table. The four-hour automatic defrost is described for the chiller models.

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 flashing on the controller
• Frost or ice visible on the back wall
• Drinks slowly warming over a shift
• Weaker airflow from the evaporator area

Possible causes

Listed in Perlick's documentation

• Loose evaporator probe plug on the controller
• Damaged evaporator probe wire
• Heavy frost on the evaporator coil
• Defrost that does not clear ice from the coil

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.

• Frequent door openings in humid air that load the coil with frost faster than defrost removes it
• Bottles pressed against the coil that insulate the probe from the coil temperature
• Probe wire hardened or cracked by repeated cold and warm cycles

Safe checks before calling for service

How a technician diagnoses error code E2

1. Read the code and confirm E2 rather than E1.
2. Check how much frost is on the coil and whether the fan moves air across it.
3. Inspect the evaporator probe, its wire and the plug at the controller.
4. Measure the probe resistance at a known coil temperature.
5. Run a manual defrost and watch whether the coil clears.
6. Replace the probe, then confirm defrost ends correctly and the cabinet recovers.

How error code E2 differs from similar codes

E2 is the evaporator probe and E1 is the compartment probe on the same controller.

Technical reference

Document

Z2363 troubleshooting table

Maker documentation

Perlick owner support

Models / control

Perlick HB/HC/HD 24-inch digital controller

Section

Troubleshooting table, printed p. 18; LED functions / alarm LED, printed p. 14

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.