This excerpt from the user's manual can explain the problem of your hinge.
"... Adjusting the microwave To obtain the best possible result with the microwave, always push the grid into the height of slot 1. Use the (or) button to select "Microwave -". Microwave power and duration are suggested...."
WHIRLPOOL AKP441IX, AKP441NB, AKP441WH, AKP 441 IX, AKP 441 NB, AKP 441 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 AKP 441 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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Here are examples for partial reference for oven :
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