Gaggia Classic - No steam, just hot water.
I recently bought a used gaggia classic and I'm having trouble producing steam. Despite my best efforts, all I can get is a short burst of steam but the majority of the time, just hot water. I'm not too sure if it's the machine at fault or me not knowing how to use it. After I pull a shot, I push down both the steam and brew switches, wait until the brew light comes on then open the valve. I notice the brew light does go on and off at different times, I'm not entirely sure what it represents.