How can I fix the bad smell coming from my Fridge freezer?

Also - sniff around the electrical sockets and light fittings in the room - with the passage of time electrical fittings deteriorate and give off a fishy smell (aliphatic amines) - time and heat are the causes.

If the wall socket or the plug has a bad connection heat will be generated which will cause a problem like you report.

If it's fishy then it will be electrical - if it's bad eggs then a fridge hygiene issue as below...

Good Luck....
December 2015

Get round the back. Look at the compressor, on top of which there is probably an evaporation tray. This catches condensation from inside the fridge / freezer and the heat from the compressor evaporates it.

There is probably food residue found its way down the condensate drain path and into the tray.

Clean the drain tube and the tray.

XXX
December 2015