What's up SC fans? Replaced outside air temperature sensor today. Correct outside temp now displayed. However a/c still only blows cold on max. When I adjust it to a warmer temp it blows hot. Check refrigerant level and all good. What's on the inside behind the 1'' square?

 

The cabin temp. sensor is behind that 1" square.

I would start by looking at the heater control valve and seeing if the actuator's rod is improperly moving through its full range of motion when you adjust the temperature just a bit. Another possibility would be the blend door, but I have no idea how to troubleshoot that.

 

Could the cabin air temperature sensor be causing the a/c to change from ice cold to hot when I try to adjust the climate control ****? I'll be checking the heater when I get home.

 

There are diagnostic tests outlined in the factory service manual for the cabin temp. sensor, but be prepared for a major PITA getting it unplugged. I partially busted up the sensor's housing and nearly broke the dash panel, and the sensor ended up being fine...

 

Where would the heater control valve be on the 95 Lex SC 4.0?

 

You'll find it on ... Google. Try harder, bud.

 

Did you ever resolve what was wrong with your system?

I have the same problem and have searched the archives for heater control valve, various sensors, air mix servomotor assembly and the climate control unit itself. I am leaning toward it being a problem with the air mix damper position/servomotor assembly. Maybe someone can share their experience with this problem.

 

i have the same prob. any advice?