My Haier HPN12XCM Portable Air Conditioner, 12000-BTU air conditioner produces a horrible smell whenever it is in fan mode after I run it in AC mode.
To reproduce the problem, I do the following:
- Run the AC unit in AC mode for 20 minutes. No smell.
- Turn off AC mode and turn on fan mode. Smell slowly fades in over about 2 minutes.
- A horrible smell will occur for approximately 20 minutes and then go away. It appears for longer if the AC unit has been running for longer.
Interestingly, if I turn AC mode back on, the smell disappears within 1 minute.
I've attempted to disassemble the unit to find the problem. Some very minor damage was present to the coils on the lower half and those coils, when rubbed with a paper towel, produced the smell of rotten eggs on the paper towel.
The smell is not easily identifiable when it's in the air, but if anything, I would guess that it smells like a mixture of butt and that awful oil smell you sometimes find on railings outside.
What I've tried to fix the problem:
I've attempted to run the unit for 7 straight days in fan mode to no avail. When I ran the AC unit for 20 minutes after that, the problem reappeared.
Unfortunately, this makes my portable AC unit inoperable, since it needs to be in fan mode for 2-3 minutes before AC mode kicks in and the smell does not go away when the unit has been off for a while. The smell is so awful that it sticks in the room for hours afterwards even if it only runs for 2-3 minutes.
I've also tried unplugging both of the rubber plugs on the back. On a humid day, one produced a small amount of liquid. Today, despite the smell, no liquid. Also the lint filter on the outside of the unit has no lint on it.
This unit is a rental from my apartment complex. I've tried switching out the unit but they both had the exact same problem.
What could be causing this smell? Is there a way to fix it?