The noise caused by the contraction of the plastic. When it gets cold and the temperature can not be adjusted condition instantly, thus making the plastic mounting plate after the retraction is loud, plastic.
The noise Caused by plastic shrinkage When it gets cold and can not be modified immediately. As a result, the plastic attaches to the back of the machine could not be retractable. The noise of the plastic
The noise caused by plastic shrink, when the cold temperatures and cannot adjust immediately. The plastic that adhere to the back plate machine cannot stretch shrink. Thus, the noise in the plastic.