03’ International 9900i A/C not cooling well

[fast69mopar]

(06-12-2022 )Redland1 Wrote:  Hello all. The A/C in my 03’ international 9900i hasn’t been cooling well lately.So far I emptied the system of refrigerant,vacuumed it down to 30Lbs for 20 minutes,and refilled with 4-12oz cans of R-134A.According to everything I pulled up online it’s 3lbs of refrigerant for my truck.Still not cooling well.

I have two 9900i's. One is a 2005 model and the other one is a 2014. Both of them cool the same and the front A/C just does not cool as well as the bunk but like the others have posted you need to check a few things that are really easy to do.

Remove the passenger seat and the trim cover. Under the passenger seat is the HVAC housing. Remove the bolts around the perimeter and remove the top cover so you can gain access to the HVAC system.

Make sure you do not have any debris inside the HVAC housing that would restrict door movement. Check for leaves, old rags/towels etc. Operate the temperature control knob in the HVAC control head and watch the blend door actuator to see if it is moving the blend door properly from one side to the other.

Once you complete a visual inspection I would install the gauges again and monitor the high and low side pressures.

Like one poster states, blocking off the heater core lines to the heater core makes a huge difference in A/C outlet temps in the dash. I installed a pair of shut-off valves under the hood on the heater hoses. I used a ball valve and when I shut of the coolant flow to the heater core the A/C temps will drop another 10 degrees and really start cooling well.