What do I do if there is a feint smell of gas near the fridge

If the fridge runs on LPG it can mean that there is a gas leak. Which can be bad because it can explode. LPG smells like rotten eggs. So if that is the smell have the fridge checked out.

• check behind fridge for expired rodents and near motor area .

Travel refrigerators use an ammonia coolant instead of freon. So the smell is telling you that you have a leak in the sealed system.

Suggest you look for a replacement fridge OR a rebuilt unit because that is usually cheaper than taking it to a service center for repairs.

Look lines going to engine, gas regulator if is bad is leaking.

poss drain holes blocked,use a syringe to blow through with clorine bleach.(clorine will gas off so no after smells)

possible coolant gas leak,

defrost water stay below the appliance sometimes for a longtime and it is possible that it creates bacteria due to warm ambient there if possible wipe the water and clean the evaporation pan near the compressor.be carefull unplugg the appliance before to proceed.

call the repairman back and say forget it ,on the motor youll see a flat pan ,like a cookie sheet on top ,the excess water from the freezer drains into a tube and into that pan as the motor gets hot it evaporates the water,just clean the pan,shut down fridge,unplug and let motor cool,clean the pan and tell hubby not to waste good beer lol

Is there any chance that small food particles have simply fallen into the fan and now trapped near or behind the fan ?

If this is the case, the food may be lodged in such a way that either heat given off from the fan or the fact the food may not be getting cool/frozen any longer, may have sent the food bad and is now generating the smell you describe.

I don't know of any fridge gas that smells like fish or funk as you put it, most are fairly neutral smelling or odorless to a point and certainly would not smell the way you have described.

• Make sure the area is well ventilated ( run a pedestal fan nearby or open a window ), fridge gas can be harmful, even in small amounts ( especially if you don't know you're breathing it ), and if the smell is as bad as you say, you may very well be gasping for air.
  

• Always have someone nearby when you attempt to do your own repair work of this nature, you just never know when you might need their assistance.
  

• If you plan on looking into the problem yourself, firstly ensure the fridge is off, and unplugged before sticking fingers anywhere near a fan - plastic or not, i have seen 4 inch biscuit fan take the tip off an index finger of in a fraction of a second, so don't think for a minute because it's plastic, it won't bite.
• Do not use any sharp pointed or metal objects to remove the fan or it's plastic cover, use fingers or flat blunt objects that can not puncture the lining of the fridge itself.
  
• ( trust me when i say i speak from experience on this )
  
• Be extra careful when removing the shroud around the fan, it should simply either click in or there maybe small coverings, covering 3-4 screws around the unit.
• Remove the fan cover, being again extra careful of the unit itself and check around with a flashlight and perhaps even a magnifying glass.
• If you can not find any offending objects, it is probably best to replace the fan and shroud and call the repair guy.
  

i have a whirlpool fridgefreezer and their is a very bad smell comming from the back of it what can it be