AFAIK, all window units come with a 5 year compressor warranty-- some
with P&L on the "sealed system". If the unit is actually no more than 1
1/2 y/o, first try and talk to the store mgr where the unit came from
and see if they will just replace it. I have an old friend who bought a
small unit from HD, and at just under 2 y/o the fan quit. He took the
cover off and found that the whole bracket or whatever the fan assy was
mounted to had rusted away. He took it back to HD and raised some hell
and got a new unit. Good luck Larry