If you see this problem in your dishwasher, it is not caused by a fault and is, therefore, not necessary to call an engineer as he won’t be able to bring the plastic back to its normal colour.
Why has this happened:
- This orange or pink colour on plastic is caused by a tomato based foodstuff, such as ketchup. This type of foodstuff contains pigments which are called carotenoid
- Fatty or oily foods will increase the risk of this type of discolouration
There is no need to be concerned, there are no harmful effects from this discoloured appearance.
These red pigments are contained in such foodstuffs as tomatoes, baked beans, tinned spaghetti, plus other items of food colouring used in curries, including some items such as turmeric. Read more here…