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the expansion valve (TX valve) is located at the inlet side of the evaporator
. the receiver/drier has to be replaced when the system has been opened
did you install the correct compressor for the type of gas in use
are you charging the system through the correct port using the correct gauge
From what you say is going on , you need the services of an accredited ac specialist shop soon before you blow too much more money
Kia Sedona expansion FRONT valve located under dash, behind glove box, fan and coil. Evacuate freon first. Disconnect Freon lines from firewall., Lay right front seat back to flat horizontal position and lay on top or totally remove the seat for easier working access. Remove under dash cover, fan, glove box, coil housing, remove coil mounting bolts, remove old expansion valve. (Inspect old valve, if debris inside, blow out coil before installing new valve. If visible debris best to consider replacing REAR expansion valve and DRIER/FILTER in front of radiator too and blow out all lines and coils while servicing.) Use compressor oil to lubricate "O" rings on new FRONT or REAR expansion valve, install valve bolts, reinstall coil bolts to FRONT firewall or REAR frame, reconnect freon lines to firewall in engine compartment. Evacuate AC system, install freon (35 1/2 ounces, nominal 3 pounds), check system for leaks, check for proper operation, enjoy.
The air temperature control blend door (mixes hot and cold air) I think you refer to is located deep inside the cars heater and AC air duct work. To repeat it you must remove the dash from the car, a job not for home mechanic in most cases. Time to do at home about 12-14 hours
when you replace new compressor/you shoud have to flush ACsystemby usingR11 AND needto replase expantion valve .after that you need to vaccuming AC system.also put AC compessor oil and refill 134A gas.
Did you replace the expansion valve?
Also try adding just a little more freon and see if that makes a difference....is there a sight glass you can view with the system activated to be sure you have it completely air free?
It does not have one,it has a orifice tube,and it is located right behind the cruse control servo,on the fend well,it is where the two lines come together.Remove the nut,it is in there,where the line is swelled.If this was at all helpful,please rate,thank you.
the problem can be a result of a loose auxiliary drive belt. If your car is equipped with a electro-hydraulic power steering it is possible that the ac system produces a system voltage drop so the power steering cannot work properly.
You should see a mechanic soon to get to the heart of the matter .
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