fastgascar
Member
- Joined
- February 22, 2015
- Messages
- 12
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- Year, Model & Trim Level
- 2004 Mercury Mountaineer
This was done on a 2004 Mercury Moutaineer
If your Front A/C is blowing cold, but your rear auxillary is blowing warm.
1. Check to make sure blend doors in rear unit are functioning correctly, there are two one is for the Hot/Cold and the 2nd is for the ceiling/floor vent.
2. Check to make sure the system is full, system requires 56oz of R134, consult with your label under the hood to verify yours is the same
I suspect the TXV(rear expansion valve) is not working correctly. The valve has a bulb attached to the cold side and is attached between the cold and hot lines. To get to it you need to remove the left rear panel.
You will need to evacuate the system since the front unit and rear unit share the same compressor. The contents are under high pressure so always take the proper safety precautions. Once the system has been evacuated, I would also suggest replacing the orifice tube and accumulator.
Once the parts are changed, you can then have someone evacuate the system again, check for leaks and fill the system.
If your Front A/C is blowing cold, but your rear auxillary is blowing warm.
1. Check to make sure blend doors in rear unit are functioning correctly, there are two one is for the Hot/Cold and the 2nd is for the ceiling/floor vent.
2. Check to make sure the system is full, system requires 56oz of R134, consult with your label under the hood to verify yours is the same
I suspect the TXV(rear expansion valve) is not working correctly. The valve has a bulb attached to the cold side and is attached between the cold and hot lines. To get to it you need to remove the left rear panel.
You will need to evacuate the system since the front unit and rear unit share the same compressor. The contents are under high pressure so always take the proper safety precautions. Once the system has been evacuated, I would also suggest replacing the orifice tube and accumulator.
Once the parts are changed, you can then have someone evacuate the system again, check for leaks and fill the system.