THIS WAS POSTED IN ANOTHER THREAD AND jIMMY LOCKED IT ON ME SO HERES YOUR ANSWER TO THIS QQUESTION..SHE SAID THE HEAT COMES OUT HOT FROM THE VENTS NO MATTER WHAT THE SETTING IS ON A 04 STYPE
THIS IS NORMALLY CAUSED BY A STUCK OPEN HEATER CONTROL VALVE, THE AC WILL NOT BE ABLE TO OVERCOME THIS SO YOU GET HEAT. THIS IS MOST COMMON, BUT SOMETIMES NOT JUST A SINGLE FAULT. I VERIFY FLOW WITH A TEMP GUN, OR YOU CAN CLOSE OFF THE HOSES TEMPORARILY WITH VISE GRIPS, IF YOU THEN GET AC THERES YOUR PROBLEM. THE OTHER ISSUES IS AN OUT OF TEMP RANGE EVAP TEMP SENSOR FOR AC DISCHARGE, YOU CAN PIN THE SENSOR WITH A DIGITAL VOLT OHM METER BUT I DONT KNOW THE SPEC FOR OHM READING FOR TEMP READING, I USE IDS TO DATALOG THE SENSORS IN THE SYSTEM. ANOTHER ISSUE HAS TO DO WITH THE FACT THAT SOEMTIMES TH AC CONTROL MODULE DRIVER CIRCUITS THAT OPEN AND CLOSE THE HEATER CONTROL VALVE BURN OUT FROM TRY TO OPERATEOR SHORT CIRCUIT, DONT KNOWTHE REASON.
BUT THE RESULT IS THE SAME REGARDLESS, YOULL NEED A AC CONTROL MODULE WHICH IS THE SWITCH PANEL IF YOU DONT HAVE NAVIGATION. THIS HAPPENS PROBOBLY 25% OF THE TIME. TO THE POINT WE QUOTE THIS ALONG WITH THE HEATER VALVE IN CASE.
IF NOT NEEDED THEN YOU DONT HAVE TOP PAY $1000 YOU WERE EXPECTING TO PAY...AND IT HAS TO BE PROGRAMMED AFTER INSTALLATION(THE MODULE)

 

CRICKETS*******
BARB...BARB...BARB...IS THERE A BARB HERE! DID YOU GET THIS OR JUST POST 1 TIME AND LEAVE.....DAMN 1 NIGHT STANDERS
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HI! First let me say you are a brave soul for inviting these questions, but also a nice guy!

We have a '04 S-type V8. AC and Ram air (what we call "the vent") blows hot air - no matter what temperature you set the AC. In fact, the lower the temp set, the hotter the air. Vent blows hot in freezing outdoor temp. What should we check first? Any help will be appreciated. Thank you.

Barb

 

Damned drive byes.....