so when I start the engine, turn the fan on full and heat

Also when I was refilling the coolant, the radiator cap filled up before I was finished pouring the rest of it in. Some air bubbles came up, so I poured a little more, but I couldn't pour the whole bottle in (I just drained the coolant and was pouring it back in). So after the fan came on I poured the rest of it in the white coolant container.