Need A/C help
84SE-EGI helpy-helperton
Joined: Oct 2002
Posts: 3,584
Likes: 542
From: Phoenix, AZ
Wow, somebody else with an SE and working A/C!
The expansion valve is located under the dash and works in conjunction with the ducting to blow the compressed and cooled liquid coolant through the orifice, expanding it right where the ducts go through the interior fan path. From there, it is drawn back out through the firewall to the compressor Low side. From the compressor, it goes to the front of the car under the valance panel, and on the driver's side you can see the filter/dryer cannister. This is also where the inspection port is located to look for bubbles in the flow when charging the system.
From the filter dryer, it goes to the condenser coils (smallish radiator), and then through the High pressure line to where I started in the first paragraph.
A pretty simple system, as long as it's working. I have converted mine to R134a to keep costs down, as I can buy the replacement cans at Walmart with their own disposable gauge sets and recharge it about every other year or so. Seems that a slow leak allows just enough to vent to stop proper functioning after the first summer. Conversion only requires new pressure caps, replacement of the filter/dryer and sucking down the system to remove any residual R12 refrigerant.
Good luck,
The expansion valve is located under the dash and works in conjunction with the ducting to blow the compressed and cooled liquid coolant through the orifice, expanding it right where the ducts go through the interior fan path. From there, it is drawn back out through the firewall to the compressor Low side. From the compressor, it goes to the front of the car under the valance panel, and on the driver's side you can see the filter/dryer cannister. This is also where the inspection port is located to look for bubbles in the flow when charging the system.
From the filter dryer, it goes to the condenser coils (smallish radiator), and then through the High pressure line to where I started in the first paragraph.
A pretty simple system, as long as it's working. I have converted mine to R134a to keep costs down, as I can buy the replacement cans at Walmart with their own disposable gauge sets and recharge it about every other year or so. Seems that a slow leak allows just enough to vent to stop proper functioning after the first summer. Conversion only requires new pressure caps, replacement of the filter/dryer and sucking down the system to remove any residual R12 refrigerant.
Good luck,
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