Been having this problem since I had the car. Got the rad, timing belt and water pump changed 2 days ago but this still happened. If I have the heat on it blows cool air only if I at a stop sign or traffic light. When the car is moving it feels the Sahara dessert. What could be this problem? Need to know and get fixed asap cuz of winter is comming early.
make sure there’s no air in the system. Keep the overflow full, b/c thats where it will pull extra fluid out of if it needs it. Then, check to see if both heater hoses are hot and that the cable is actuating the shutoff valve at the firewall. try that and see where your at.