I have not quite old Soleus 12000 BTU Portable Air Conditioner. Yesterday it started throwing an E4 error code. Contacted the company today, they didn't seem surprised that it did. Said they would replace it under warranty if I faxed them the purchase receipt. Sounded good so far. Faxed them the receipt, they called back and said we're good to go, we ship you out a unit, you'll just need to send the defective one back to them in California. I asked who pays shipping they said you do but itshouldn't be that expensive. I called UPS and they said at least $110.00, could easily be more. Only paid $289.00 including tax for it new. Dosen't make sense to pay almost half as much to get another unit which may do the same thing and be out the money. I then asked bout a service manual or parts and they said they don't have any. In my opinion this is a poor way to run a company.