AC issues

[92yamaha]

Hey guys, couple of days ago my ac and fan started acting up on me. My ac only blows to the windshield, and so does the fan. When switching positions to "floor", or "panel", it doesn't do anything. I tried switching out the EATC but it did not help. Please if anyone has any suggestions let me know. thanks

 

[excidere]

I would guess the Blend Door Actuator... and it is a PAIN to swap, while you have the dash out you should also replace the heater core and the ac condenser... Maybe someone more knowledgeable will pipe in.

 

[Kens1992mtxSHO]

Try this self test to check your system.

http://www.shotimes.com/php-bin/modules.php?op=modload&name=News&file=article&sid=139&mode=thread&order=0&thold=0

 

[projectSHO89]

No. You probably lost your vacuum supply to the EATC.

Steve

 

[92yamaha]

I checked all the vacum hoses to the EATC as good as I could.Also the ones behind the glovebox. Is there any certain ones I should look for.

 

[92yamaha]

Tried the self test and it passed, don't know what to look for anymore.

 

[projectSHO89]

The EATC self-test won't test for vacuum.

Locate the vacuum line where it goes through the firewall at the heater hose ports. Inspect it and its under hood connections for leaks/disconnects, etc. Verify you have no restrictions or leaks in that line all the way from the intake manifold to the EATC control head.

Steve