err-02pb31

Honeywell PB31 error 02: Temperature Problem

The Honeywell PB31 error 02 is a safety measure protecting the print head when temperatures exceed operating limits. This error usually occurs after intense graphic prints or in extreme heat environments. Knowing how to cool the Honeywell PB31 after error 02 allows you to resume work quickly without compromising quality.

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Common causes

  • 1Heavy work cycle: Too many labels printed in a short time.
  • 2Hot environment: Ambient temps above 40°C.
  • 3Blocked vents: Dirt blocking airflow and heat dissipation.
  • 4Failed thermistor: The internal temperature sensor sending erroneous data.

Solutions

Quick Diagnosis

The error is shown via a flashing red LED and a panel message, followed by the stopping of all drive motors.

Step-by-Step Solution

  1. Pause printing: Power off to stop heat generation.
  2. Cooling: Place the device in a cool area away from heat sources.
  3. Inspection: Check that vents are not blocked.
  4. Restart: Power on after 15 minutes of rest.

Prevention and Maintenance

Avoid leaving mobile printers in sun-drenched vehicles. Keep the print head clean of adhesive residue, as build-up increases print effort and head temperature.

When to Call a Technician

If the error appears immediately after turning on a cool device, the internal thermistor is defective.

Device Technical Sheet

  • Technology: Direct Thermal
  • Compatible consumable: 3-inch thermal rolls
  • Connectivity: Bluetooth / Wi-Fi
  • Recommended use: Mobile logistics printing
  • Official drivers / firmware

Steps to follow

  1. 1

    Pause printing

    Stop any print jobs currently in progress immediately.

  2. 2

    Cooling

    Place the unit in a cool, ventilated area for 15 minutes.

  3. 3

    Restart

    Power on the device and check if the alert has cleared.

Frequently asked questions

It warns of excessive temperature in the thermal print head.

Continuous operation can permanently burn out the print head.

Use high-quality compatible thermal paper to avoid straining the burn temperature.

Do not perform continuous mass printing under direct sunlight or inside hot vehicles.