❄ Walk-In Cooler Code Lookup

Walk-in cooler showing an alarm code?

182 documented fault codes across Carel and Danfoss and Dixell (Emerson) and Heatcraft (Bohn/Larkin) and KE2 Therm and Norlake controllers, taken from the manufacturers' own manuals — what each one means, what to check yourself, and when it's a tech call.

Carel38 codes documentedDanfoss44 codes documentedDixell (Emerson)12 codes documentedHeatcraft (Bohn/Larkin)54 codes documentedKE2 Therm12 codes documentedNorlake22 codes documented

Find your controller

The brand on the box door usually isn't the brand talking — the alarm comes from the refrigeration controller. Match what's on your display:

Carel ir33 / ir33+
Compact panel display; the code shows in place of the temperature with a bell icon.
Carel PJ Easy (PJEZ)
Small Carel thermostat; E0/E1/E2, dOr and cht/CHt alternate with the temperature.
Danfoss ERC 211 / 213 / 214
Danfoss ERC 21X display; E27/E29/E30 sensor errors and A01–A99 alarms.
Danfoss EKC 202 / AK-CC 210
Danfoss case and cold-room controller; E, A and S (status) codes.
Danfoss Optyma Plus
Controller built into a Danfoss condensing unit; A2, A17, A80, A96.
Dixell XR06CX / XR60CX
Small Dixell XR display on many Norlake and Kolpak boxes; P1, HA, LA, dA, CA.
Heatcraft intelliGen
OLED display with a green / yellow / red light bar; AL, ER and IN codes.
Heatcraft Beacon II
Two-digit LED on the evaporator board (A1–A4, E1–E9); optional LCD Smart Controller.
KE2 Evaporator Efficiency
Scrolls alarms in plain words with a yellow or red LED beside the readout.
Norlake programmable controller
Four-line LCD panel with an ALARM button; alarms in full sentences.

Local service

Nashville, TNLocal repair & serviceBirmingham, ALLocal repair & service

Guides

Why is my walk-in cooler not cooling or holding temperature?
Six causes explain most warm walk-ins. Three of them are free to fix, and product is on the clock.
What do the alarm codes on my walk-in cooler mean?
The box doesn't throw codes — the controller does. Identify yours, then learn what it's actually measuring.
Why is ice building up in my walk-in freezer or cooler?
Every patch of ice in a walk-in is moisture that got in and a defrost that didn't handle it. Find the source.
How do you maintain a commercial walk-in cooler or freezer?
Walk-ins fail from neglect in predictable ways. A daily/weekly/quarterly rhythm that catches all of them early.
How cold should a walk-in cooler or freezer be?
Coolers: food at 41°F or below, so most boxes run 35-38°F. Freezers: 0°F or below. Here's why, and how to check yours honestly.
Why does my walk-in cooler run constantly and never shut off?
A compressor that never cycles off is fighting heat, starving for refrigerant, or being lied to by a sensor.
Why is there water on the floor of my walk-in cooler?
Four sources explain walk-in floor water: the drain, the door, the pan, or a leak. Trace it before the injury or the citation.

All 7 guides →

Equipment still down? If you're in Middle Tennessee or Central Alabama, see who services walk-in coolers near you:
Nashville, TN →  ·  Birmingham, AL →

Sources

Every code on this site is taken from the manufacturer's own manual: