I have a Carrier split system two units (have 2 thermostats). We are in fall and temperature in the late night and early morning falls to high 40's here in NC. My wife turned the ground floor thermostat from cool to heat at around 10 pm. Thermostat in the 2nd floor was still set to cool which was there since summer. In the morning at around 6 am I heard loud rattling noise coming out of the outside heating unit. I think I smelled a little bit of burning smell inside home which came out of the condensor unit. I cut the power off to the unit by pulling off the circuit connector outside the unit at around 12 noon. I have left the town for a month and only my wife and kids will be at home. Now, only AC is running. I have not yet scheduled for a winter tune up yet since the temp outside is not that cold. I will be back sometime in early Nov (about 4 weeks from now). I did not observe whether the condensor fan unit is running or not when I cut off the power to the unit. Here are the possible things that could have happened:
1. Condenser fan motor blown (may need to replace fan blades too) and I was told by the technician last year that my far might break anytime.
2. Capacitor may be blown.
I would like to be personally present when I call the service technician that won't happen any time soon. Is it OK to keep the thermostat to cool or should I turn from Cool to fan only in both the thermostats (weather seems cool and we can manage without AC for the month of Oct we are in NC) until I fix the condenser in 3-4 weeks from now. Will this harm the system more by blowing the actual compressor. Should I have the technician come in right now and take care of the condenser.