overheating, light flashing, air in system? how do i release air?

[986_inquiry]

Ok so I followed the guide, but to avoid pissing off my neighbors from revving the engine for 10 minutes I went for a short drive. 15 minutes later I was back home and the light was flashing again.

I left the caps off the coolant and oil while driving like instructed, nothing boiled over, no coolant anywhere except for a small splash on to trunk lid, perhaps I hit a bump or something.

I'll let it cool, then add coolant to MAX mark, and hope that solves it.

Here's the four functions of the coolant warning light
1. Engine coolant level too low -- light flashes slowly (0.5 Hz)
2. Engine compartment temperature too high -- light flashes slowly (0.5 Hz) (engine compartment blower might be faulty)
3. Engine coolant temperature too high -- light is lit; pointer on the right
4. Temperature sensor at water outlet faulty -- light flashes rapidly (1 Hz) ; pointer on the right

Mine flashes slowly, but the coolant is not low and I don't think the engine compartment temp is too high, but maybe it is the temp, I'll look into that more because that's what the light says is happening...