Q&A

How do I fix this issue? Thanks George

The air conditioning and the compressor all work fine. No leaks. The temp control works fine. The blower motor works fine. The is no loss or leak of anti freeze. The heater core does not leak. I have heard a sound of a sqeaking constantly whenever the car in on like a vacum constantly moving something.

There is no smell of antifreeze in coming from he blower vents. The antifreeze level has not dropped. There is nothing in the passenger compartment or on the floor or under the engine compartment.
There is only this constant squeaking sound coming from the area of the air intake under the plastic cowl.
How do I check about a vacum leak on the heater control?

There are no vacuum controls on the HVAC system, it's all electronic motors. Exactly where is the noise coming from?

The heater core is under the center of the dash. I would still want to look at it to see it's not leaking. It doesn't take much to fog up the windows. The heater core is just to the right of the accelerator pedal. Pull the carpet down and the plastic side panel off, and you'll see the heater core. If it's leaking, you'll see some signs.

The sound comes from under the dash on the passenger side somewhere near the fire wall. It sounds like somethings or flap is trying to open and close.

There is an air recirculation door that allows fresh air into the cabin, or recirculates inside air. Silly question, are you sure it's a S70 and not an S90?