# Starting operation

- Remove the rechargeable battery before changing accessories or storing the heat gun. This safety measure prevents the heat gun from being started accidentally.

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A coating protects the metal surfaces from corrosion ex-works. This protective layer evaporates during initial use.

The heat gun may display discolourations on the nozzle (1) due to the production process. These do not count as damage; the functioning of the heat gun is not affected.

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With the output level setting (3) you can choose between two different output levels. The LED worklight flashes briefly while switching:

- Setting 300 °C
  With this setting, you can, for instance, thaw water pipes or process heat shrink plastic tubes. Upon switching on, this temperature is reached in less than 6 s. With a fully charged 8 Ah rechargeable battery, the runtime is up to 21 min.
- Setting 500 °C
  With this setting, you can, for instance, remove paint.

The specifications on heating-up time refer to measurements at room temperature.

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To switch on, first press the unlocking switch (4) and then the on/off switch (5). After starting, you can release the unlocking switch (4). The unlocking switch (4) does not have to be pressed again during operation.

Upon starting the heat gun, the LED worklight (6) switches on and illuminates the work area.

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To switch off the tool, release the on/off switch (5).

Switch off the heat gun at the rechargeable battery (8) to allow it to cool down.

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If the rechargeable battery (8) is removed from the heat gun while in operation and the on/off switch (5) is still being held down when it is reinserted, the restart protection will activate. The LED worklight (6) flashes and the heat gun does not start.

Release the on/off switch (5) and switch the heat gun back on as usual.

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If the rechargeable battery (8) gets too hot during operation, the output is reduced. The LED worklight (6) flashes slowly for as long as the on/off switch (5) is pressed.

If the heat gun continues to be operated and the temperature in the rechargeable battery increases further, the heat gun will switch itself off.

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The heat gun is compatible with all available 18 V Bosch Professional rechargeable batteries.

When operating the heat gun with rechargeable batteries smaller than the recommended 4 Ah, however, the heat gun will not reach full power at the 500 °C setting (the temperature is not reached and the air volume is reduced). In order to show that the heat gun is working only with reduced output, the LED worklight (6) flashes slowly several times upon switching on.

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The LED worklight (6) is also used as an LED status indicator.

Feedback via LED | Event description
--- | ---
Brief flashing | Temperature change
Flashing multiple times when starting the heat gun | Reduced output (use of rechargeable battery < 4 Ah)
Flashing slowly for as long as the on/off switch (5) is pressed | Restart protection
Overheat protection for the rechargeable battery
Flashing quickly for as long as the on/off switch (5) is pressed | Internal error

If there is a permanent internal error in the heat gun (the heat gun does not start or switches off when it is already in operation), please contact customer service.