At the thermostat you should have the option to turn the Fan switch from Auto to On.
Another approach is to remove the disconnect outside by the compressor unit and then turn the A/C on.
The disconnect is most likely a grey box about 4"x6" with a cover. It will either have fuses or a T-handle blade style jumper to complete the circuit. Turn the power off and then remove whatever convention they are utilizing and then turn the power back on and turn on the A/C.
Your basically looking for a mean of running the indoor blower without running the A/C.
If you have to, you could simply turn the Heat on for a short while to see if the indoor blower fan motor is the cause of the problem.
Most likely, it's the outdoor unit that is the problem.
Good luck and be safe.