Fridge made really loud echo when...? I was vacuuming the stern to get rid of dust! The...

I was vacuuming the stern to get rid of dust! The fridge have stopped cooling, so I decided to vacuum adjectives the dust and stuff.

I took a panel off and started vacuuming. Whenever I touch this element at the back of the fridge beside the vacuum it makes a HUGE ding/thud racket. It's so loud I can feel it contained by my arms. It did it twice and now I'm afraid to touch anything backbone there. Its similar to a huge magnet was attracted to the vacuum nozel (which is made of metal). I can't even see anything moving that would breed that noise... really wierd... but presently the fridge seems approaching its working!
may be it is condensor enthusiast motor


Ok...

When you usually take apart anything captivating (coverage of the fridge) everything will be exposed. Usually a fridge vibrates, its basically you can't hear it. So when you took a piece out, you took protection off so presently you can hear the sound.
Answers:    You hit the condenser fan motor blades near the vacuum cleaner.. It has a shroud to cover it so you most imagined didn't see the fan blades. Dirt contained by the condenser coils will cause the component to quit working.. You did good surrounded by cleaning it. Good Luck and God Bless.