Dexter Error Code COMM_ERROR_1 — Error Code COMM_ERROR_1

Service Guy AI • Commercial Laundry Equipment • Medium severity • Intermediate skill • ~30 min repair

What Does Dexter Error Code COMM_ERROR_1 Mean?

Dexter error code COMM_ERROR_1

This is a medium-severity fault. The machine may complete the current cycle but is signalling a problem you should resolve before it escalates.

Possible Causes (5)

Dexter engineers identify the following root causes for fault code COMM_ERROR_1. Work through them in the order shown — they are listed from most common to least common.

1. Faulty communication between the control board and the display
2. Loose or damaged wiring harness
3. Defective control board
4. Interference from nearby electronic devices
5. Software glitch in the machine's firmware

Step-by-Step Troubleshooting (5 steps)

Follow this sequence to diagnose and clear Dexter error code COMM_ERROR_1. Power down and unplug the machine before any internal inspection.

1. Disconnect power before servicing.
2. Inspect the wiring harness for any loose or damaged connections.
3. Check the control board for any visible signs of damage or burn marks.
4. Ensure that there are no nearby electronic devices causing interference.
5. Reboot the machine to see if the error clears after a power cycle.

Required Parts

Have these Dexter OEM part numbers ready before starting the repair. AAdvantage Laundry Systems carries verified parts for every code in this database.

• Control Board
• Wiring Harness

Diagnostic Test Mode

Enter Dexter diagnostic test mode: Hold 'Medium + Start' for 5 seconds

Skill Level & Repair Time

This repair is appropriate for an experienced laundromat owner or in-house technician. You should be comfortable removing service panels, reading wiring diagrams, and using a multimeter to test continuity and voltage. Plan for approximately 30 minutes of active repair time once parts are on hand.

Get AI-Powered Diagnosis

If the steps above don't resolve Dexter COMM_ERROR_1, run a free Service Guy AI diagnosis. Upload a photo of the error display and get an AI-generated repair plan tied to your exact Dexter model number, including supplier links for required parts and on-call technician escalation.

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