92 Civic Dx. My son had to pull the dash to replace the heater core because the vents stopped blowing cold air and I thought the heater core was plugged up (had not used antifreeze and car radiator got clogged and had to be replaced.). The blower motor works great, the mode control motor switches moves the levers, but none of the dash vents blow any air!!! We even tried blowing air from our air compressor, but none comes out.
I found how to check heater codes test and haven't run it yet, but hoped someone might have a simple answer (or My son will have to pull the dash again) Thanks in advance, vgsmith73