Great thread, have read all of the advice in it.

Another heater giving off no air flow and am getting no warm air exiting vents at all in a MK1 1999 1.6 ghia , not sure of best next move.

Originaly heater only blew on 3 and 4. Then car was covered in snow several days over Christmas.

When heater failed wasn't sure if it was blower motor, resistor pack , switch or other. Since resistor pack probably wasnt working properly I swapped that out first. btw if you have a screw holding yours in a small ratchet worked well with access from behind the glove compartment rather than from under neath it.

Still no warm air on any setting.

There's no damp in the n/s footwell and pollen filters look ok .Not sure to look at blower motor next or blower heater switch next?

(took stereo out , couldnt see how to get to switch. is it unscrew the 4 screws by stereo housing and pull out the dash panel after removing the 3 dial knobs?)

cheers for any ideas!