{"id":10388,"date":"2026-06-04T02:32:32","date_gmt":"2026-06-04T04:32:32","guid":{"rendered":"https:\/\/www.byteyourlife.com\/?p=10388"},"modified":"2026-06-04T06:37:25","modified_gmt":"2026-06-04T08:37:25","slug":"repairing-the-zehnder-comfoair-q350-myself-when-a-faulty-sht30-sensor-sends-the-unit-into-a-bootloop","status":"publish","type":"post","link":"https:\/\/www.byteyourlife.com\/en\/household-tools\/repairing-the-zehnder-comfoair-q350-myself-when-a-faulty-sht30-sensor-sends-the-unit-into-a-bootloop\/10388","title":{"rendered":"Repairing the Zehnder ComfoAir Q350 Myself: When a Faulty SHT30 Sensor Sends the Unit Into a Bootloop"},"content":{"rendered":"

Today I’d like to tell you about a small but instructive repair. Our Zehnder ComfoAir Q350<\/strong> ventilation unit was manufactured on 05\/07\/2019, which makes it around seven years old now, about six of which it has been running in our home. Until recently it worked reliably. But in June 2026 it suddenly displayed the message “Maintenance mode” or something similar on the screen. With the very first press on the device display, the unit then started restarting itself over and over again, once per second. In this post I’ll walk you through how I narrowed down this bootloop<\/strong> step by step and finally repaired it myself.<\/p>\n

The video below shows the problem of the bootloop.<\/p>\n

\"Zehnder<\/a><\/p>\n

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