Hi everyone I'm new here and could use a little help. I have a 2000 S40 and theres no heat blowing from the vents. The fan works just fine and the engine temp gets up to the normal temp. I just replaced the temp control module (not sure the correct name, its the part where u adjust fan speed and temp) and that didnt help. It feels like both coolant lines going thru the firewall to the heater core are getting warm but the one on the left seems warmer. Not sure if I have a blockage or an air pocket. I recently replaced the radiator due to it leaking. Anyone have any ideas??

Thanks

 

Try using this bleed screw. See if any air is tapped. When mine gave me cold air it was just low on fluid.



It in the top right of this photo to give you an idea of location: