Airflow stays in defrost mode only

[scippy]

Hello to all, Im new to the site and happy to be aboard.
I'm looking to resolve an issue with my 03 Marauder air
vent selection mode. Air flow stays in defrost mode no
matter what button I select...could this be a vacumn
problem? I checked all the hoses for leaks, but no leaks.
car has 60K mi. ..........Thanks

[NRAUD]

Check this post out.

JA Cook's fix (http://www.mercurymarauder.net/forums/showthread.php?t=36922)

[scippy]

Thanks NRAUD, Great find - Great site!

[bob6364]

Circle the O-rings boys....winters on the way!

[jonroe]

My EATC started this in the summer. It's not that easy to cool down a hot interior when the panel vents don't work! Since I'm still under ESP I let it go until last week when I took it into the dealer. They replaced the EATC under the ESP warranty. So, NEXT time I'll have to do it myself with the o-rings.

[dakslim]

My EATC started this in the summer. It's not that easy to cool down a hot interior when the panel vents don't work! Since I'm still under ESP I let it go until last week when I took it into the dealer. They replaced the EATC under the ESP warranty. So, NEXT time I'll have to do it myself with the o-rings.

I'ts not hard...takes about half an hour.

[ctrlraven]

I replaced the O-rings myself and it really didn't solve any problem. Even when the EATC is off I still get air coming out Floor and Defrost but after replacing the AC check valve and doing the O-rings I did gain full Vent control back (no floor or defrost while selected Vent).