No heat. Heater fan working. Air Conditioning light comes on when AUTO is press

It sounds like you have two issues. The first sounds like a blower issue causing the blower motor not to work, that could be in the blower resistor or motor control. The other issue with the flashing auto light is usually a indication that your Freon level is low. Please contact us for diagnostics to be run on these issues. Both are easily reparable, and a service that can be done quickly. Sterling Car Care 586-939-0230