[ptg]

My '99 Beetle is overheating with the red light blinking after 10-15 minutes of driving. Also, no hot air is coming out when the heater is turned on. I've already flushed and refilled the coolant with G12. I've also replaced the A/C switch and Coolant Temperature sensor, but still no go.

When I opened the hood and turned the heat to full blast, I noticed that one of the fans are not running. Also, I can feel that the upper radiator hose is very hot and full of coolant. The lower hose is cool, and also full of coolant, so I don't think there is any air trapped in the system.

What should my next move be? Change the coolant thermostat? Water Pump? Which one first? Any help would be very much appreciated!!