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Old 07-09-2003, 03:20 PM
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Join Date: Jul 2003
Location: Michigan
Posts: 22
Air conditioning

sorry Mr Bible,
1984 300D, new compressor and recharge, onlt blows hot air even when I put on the vent
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Old 07-09-2003, 03:23 PM
Posts: n/a
In that case, you should indeed check the monovalve. It is a square looking valve near the battery on the firewall. If you remove the four screws and both sides of the diaphragm are "flooded" then you need to get a repair kit and replace the diaphragm/plunger unit.

Also, remove the glove box and look behind it to see that there is a foam hose going horizontally connecting the temp sensor with the horizontal pipe. If it is gone, get some foam pipe insulation at Home Depot and craft a new hose.

Good luck,
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