if u would have noticed the onion smell comes only when you cut onions .
An air conditioner should not smell like smoke when turned on (or when turned off). I would have to suspect that the electrical insulation is burning.
A smell coming from a reverse cycle air conditioner may be a signal that the filter needs to be cleaned. A smell like engine exhaust might be present if the air conditioner motor is in need of repair.
because you have too many dead babies in your air conditioner tank
Failed compressor
It sounds like there is a leak inthe evaporator section of your air conditioner. If this continues, the air conditioner will no longer cool and you may have to replace several components of the system. The smell is that of atomized esther oil.
It sounds like there is a leak inthe evaporator section of your air conditioner. If this continues, the air conditioner will no longer cool and you may have to replace several components of the system. The smell is that of atomized esther oil.
sounds like your air conditioner compressor is bad.
The belt that runs the fan may be wearing out.
Build up of dead bugs in water on outside of unit.
Maybe there is something wrong with yours or you have animals who have urined somewhere in your house.
clean it, then spray it with air freshener.
there is a leak in the compressor...