Happening to us, too, with a brand new GE room air conditioner, 5000BTU. Plastic smell is mentioned in the appliance brochure which says the smell can last 2 weeks. But I was worried about toxic fumes so I called GE. The woman told me the smell should last only a couple of hours and that I should take it back.
So now we have to take it out of the window, hump it 40 minutes to the store, get another one, hump it home, install it and see if this one is any better. If not, we have to repeat the process. That's GE customer service?! Also, very noisy. I'm looking elsewhere.
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.
The belt that runs the fan may be wearing out.
The first and easiest answer that comes to mind is that there is a problem with the cabin air circulating fan. BUT - - there is not really enuf specific information. Are you sure it is a burning RUBBER smell, or a burning PLASTIC smell, or a burning ELECTRICAL smell? All could point to different problems.
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.
sounds like your A.C. compressor clutch is locking up
What most likely is happening is the A/C compressor has gone bad and its not able to turn when it is switched on. The burning rubber smell is probably the belt sliding across the compressor pulley that's not turning.
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.
because you have too many dead babies in your air conditioner tank
The musty smell from your air conditioner is likely caused by mold or mildew growth in the unit. This can happen when moisture accumulates in the system, providing a breeding ground for these microorganisms. Regular cleaning and maintenance of your air conditioner can help prevent this issue.
The unpleasant smell from your air conditioner could be caused by mold or mildew growth in the unit, a clogged filter, or a buildup of dirt and debris. Regular maintenance and cleaning of the air conditioner can help prevent these issues.
The belt is burning up and wind is pushing the smell through the air conditioning.
clean it, then spray it with air freshener.