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Common interlock fault part on appliance no-start errors.
Ecolab Dishwasher Fault Codes — What They Mean
Ecolab provides chemical programs and equipment for commercial dishwashers across food service and healthcare. Ecolab’s chemical dispensing systems and their SMART chemical controllers display fault codes when problems occur with the chemical feed or machine integration.
| Code | Meaning |
|---|---|
| AL 01 | No detergent (dispenser empty or fault) |
| AL 02 | No rinse aid |
| AL 03 | Conductivity too high (over-concentration) |
| AL 04 | Conductivity too low (under-concentration) |
| AL 05 | High water temperature alert |
| AL 06 | Low water temperature alert |
| AL 07 | Communication fault (machine interface) |
| AL 08 | Probe fault (conductivity sensor) |
Common Fixes
AL 01/AL 02 (empty): Check product containers and prime the dispensing lines. Ecolab dispensers are volume-based — verify dosing pump operates when called.
AL 03/AL 04 (concentration): AL 03 (over-concentration) usually means the dispenser is over-dosing — check dosing volume setting. AL 04 (under-concentration) means empty container or clogged dispensing tube.
AL 08 (probe fault): The conductivity probe that monitors chemical concentration is coated with scale or has failed. Remove and clean the probe tip. Replace if reading doesn’t respond correctly to known concentration standards.
AL 07 (communication): The Ecolab controller has lost communication with the dishwasher’s control system. Check the interface cable between the Ecolab controller and the machine.
Parts Often Needed
| Part | Notes |
|---|---|
| Conductivity probe | Clean quarterly; replace if coating is damaged |
| Dosing pump | Replace if pump isn’t delivering product |
| Ecolab product (detergent, rinse aid) | Refill when AL 01/02 appears |
Related Resources
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- Beverage-Air Refrigerator Error Code E1 — Causes & Fix
- Beverage-Air Refrigerator Error Code E2 — Evaporator Sensor …
Need Replacement Parts?
Before ordering, match the refrigeration part to the model number, electrical rating, and failure symptom. Check current prices on Amazon - prices and availability change frequently.
When to Call a Pro
Ecolab service representatives handle chemical program adjustments and SMART controller configuration. Contact your Ecolab account representative for persistent AL 03/04 concentration faults.