I have a Lennox HS9-511-4P. After running the AC, accidentally, with the winter cover on it for maybe more than a day, unknown to me at the time. I removed the cover, to set up the AC for the 1st time I thought, I had to peel off parts of the cover. Started the AC abd noticed the fan was not running at the speed it usually does. I walked away and came back - the fan was off. I opened up the AC - the compressor was very hot. I let the system cool and tried again - the fan again ran real slow - it just does not go as fast as it usually does. Is there any simple fix for this problem? Replace fan or another part that is responsible for the fan speed? Fan is oiled and moving freely.