This excerpt from the user's manual can explain the problem of your transformer.
"... The aluminium must not come into contact with the walls on the inside. Unplug the plug from the outlet or cut the electrical circuit of the oven. Do not use caustic or abrasive products, scouring pads or sharp objects, as they could cause stains and scratches. This food category includes egg, mussel and oyster yolks and whites, as well as uncut fruits and vegetables. Checking if food is cooked Food is cooked so quickly in an oven that it needs to be checked often. Some foods are left in the microwave until they are completely finished, but most foods, including meat and poultry, should be taken out of the oven while they are still slightly dull to continue cooking outside the oven...."
ARTHUR MARTIN 506251, 5062470, 50624730, 50624760, 50624790, 506247120, 50625W1, 50625850, 506258535, 506258570, 5062585105, 5062585140, 506 25, 506 20, 506 225, 506 250, 506 275, 506 2100
Manufacturer's part price is £41.89 Discount for bulk (starting at 10 units), £40.51 per unit
This manufacturer part is recomended by ARTHUR MARTIN, which gives it a 10/10 rating.
This spare part is recommended for your ARTHUR MARTIN 506 25 microwave oven .
All spare parts are new and come with a 1 year warranty
① Carefully check your ARTHUR MARTIN microwave oven's product number
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