AC blows Heat

[HRC280]

Hi guys this is my first time posting and was hoping you guys could give me some good advice.

I have a 94 c280 black on black w/196k on it. I baught it about 3 weeks ago. Engine sounds good.

Problem: When I turn on my a/c on all iI get is hot air, like if the heater is on. I had it checked for freon and it was ok. I was told that ther may be a heater relay switch or shut off valve that may be stuck and thats why I get heat. AC line into dash does get cold and seems to be working.

I would appreciate any suggestions, since this week out in NorCal we are experiencing mid 90s to 105 degree heat!

Thanks

Photos @ http://photos.yahoo.com/hugo_rayo

[jnenad16]

first, welcome!
second, your duo valve is probably stuck open if the ac is warm. do a search, it has been discussed many times before.

nenad

[HRC280]

Is there any way to bypass the duo valve? Maybe diisconnecting the hoses and looping them together?

[MBHustla858]

put the duovalve in, unfortunatly they aren't like the older cars where you can actually repair them.... try tapping it w/ a hammer and see if it frees up.... otherwise ur SOL

[jnenad16]

yes you can bypass it, but you wont have the heater anymore.

nenad