Goodman Gas furnace GDS81155CXB. When we went to test furnace at end of October, the motor spins fine, then we get 2 blinks followed by repeating 3 blinks on the error light. I am no HVAC guru by any means. Any help would be greatly appreciated as I don't have big bucks to shell out.

The code to the blinking lights should be on the blower door telling you the fault.