Is it safe to lift the HBL503 oven by its door handle during installation?
No — do not lift the oven by the door handle under any circumstances. The manual explicitly warns against this and instructs you to remove the door for easier handling and installation. See the 'Removing the Oven Door' section in the Use and Care Manual for proper door removal instructions. (Page 3)
From the official Bosch HBL503 500 Series Single Wall Oven manual, page 3
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