This excerpt from the user's manual can explain the problem of your hinge.
"... During operation, the inside of the WHIRLPOOL AKZ 378 IX oven or any door or hinge safety device is hot. If there are products containing alcohol in the oven, a flammable mixture of alcohol and air may form. In this case, the door must be opened carefully...."
WHIRLPOOL AKZ378MR, AKZ378IX, AKZ378WH, AKZ378AL, AKZ378NB, AKZ 378 IX, AKZ 378 NB, AKZ 378 WH
Manufacturer's part price is £11.00 Discount for bulk (starting at 10 units), £10.64 per unit
This manufacturer part is recomended by WHIRLPOOL, which gives it a 10/10 rating.
This spare part is recommended for your WHIRLPOOL AKZ 378 IX oven .
All spare parts are new and come with a 1 year warranty
① Carefully check your WHIRLPOOL oven's product number
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