My BOSCH HC400015 convector is not heating after a month of inactivity, and the screen displays flashing numbers. What should I do?

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Accepted Answer

The flashing numbers on the Bosch HC400015 screen generally indicate an initialization or reboot phase of the electronic system after a long period of inactivity. This is normal behavior. Here’s how to restart your convector:

Step 1: Complete Reset
Unplug the device from the power outlet for at least 10 minutes. This will allow the electronic system to fully reset. After this time, plug the convector back in and wait 30 seconds without pressing any buttons before proceeding.

Step 2: Let the device initialize
Wait 1 to 2 minutes during the initialization phase. During this time, the screen may continue to display flashing numbers. This is normal and the device will configure itself automatically. Do not touch the buttons during this phase.

Step 3: Check operating settings
Once the screen stabilizes, check the following:

Ensure that the convector is in Heating mode (and not in ECO or PROG mode)
Set a temperature setting between 19 °C and 28 °C
Check that the “Open Window Detection” function is disabled (this function automatically stops heating if it detects an open window, which would prevent the device from heating)
Ensure that the buttons are not locked (an accidental lock could prevent any adjustments)

The device should then return to normal operation with the temperature displayed on the screen. If the flashing persists or if the convector still does not heat after these steps, this may indicate a problem with the temperature sensor or the electronic circuit. In this case, contact Bosch customer service or an authorized technician, especially if your device is still under the 2-year warranty (as stated on your invoice or purchase documentation).

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