Hey Guys, I haven't been here in a while, but it's good to see some familiar names! I have a Lennox 10ACC−036−230, last night I noticed that the air coming out of the vents was a little warm & I also noticed a loud screeching sound coming from the unit outside. It also sounded like the condenser fan was not turning. So I immediately shut the system off by the thermostat. I have had problems with the fan in the past which had been resolved by replacing the capacitor and oiling the fan shaft with Zoom oil. The system has also had a slow refrigerant leak so at the start of the season (within the last month) I again oiled the fan and also recharged the system with approx. 2 lbs. of R22. I was not able to go outside to physically check the unit tonight because it was dark and it was raining quite a bit (I know waa!). I plan to check it first thing in the morning. I am concerned that it might have over-heated the compressor since it was blowing warm air out of the return vents/registers. How can I tell if the compressor is working properly? I know how to check the fan but I don't want to replace the fan not knowing if the compressor was damaged. Thanks for your help!