What does Hatco E1 mean?

On a Hatco FDWD-series humidified holding cabinet, E1 shows on the digital display when the air temperature sensor is malfunctioning. The control can no longer read cabinet air temperature reliably, so it cannot regulate the heat.

What does Hatco E2 mean?

On a Hatco FDWD-series humidified holding cabinet, E2 shows on the digital display when the humidity sensor is malfunctioning. The control can no longer read cabinet humidity correctly, so it cannot manage the moisture level that keeps held food from drying out.

What does Hatco LO h20 mean?

On a Hatco FDWD-series humidified holding cabinet, 'LO h20' flashes on the digital display when the low-water probe does not detect water in the reservoir. Without water, the unit cannot produce the humidity that keeps held food moist.

Does AskWhiz cover Hatco equipment?

Yes. AskWhiz is trained on official Hatco service and operator documentation, so it can answer fault-code, error-message, and repair questions for Hatco commercial kitchen equipment directly in WhatsApp.

How do I troubleshoot Hatco error codes?

Send AskWhiz your Hatco model number and the error code or symptom on WhatsApp. It searches the official Hatco manuals and returns the likely cause and the documented fix, step by step, so you stop scrolling through PDFs in the field.

Is AskWhiz a substitute for the Hatco service manual?

No. AskWhiz reads the official Hatco documentation and surfaces the relevant procedure fast, but always follow the manufacturer safety warnings and call a qualified Hatco technician for work that requires one.

Commercial Kitchen

Hatco error codes, decoded.

Look up any Hatco fault code below. Each one is grounded in Hatco's own service documentation — the meaning, the symptoms, the causes, and the steps to clear it.

By Nichita Herput

Co-founder & CEO · Reviewed May 2026

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Hatco sits in our Commercial Kitchen coverage. Every page here is transcribed from the manufacturer's manuals, not scraped from forums.

What error codes does Hatco display?

Tap a code for the full breakdown — meaning, symptoms, causes, and fix steps.

Air temperature sensor malfunctioning

Humidity sensor malfunctioning

LO h20

Low water probe does not detect water

dE-L

Water reservoir needs deliming

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Common questions about Hatco equipment

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