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Discussion Starter · #1 ·
The A/C pressure is too low to keep the compressor running so i can charge the system. The hose I was using to charge the system leaked and I ended up with less freon than I started with...bummer.
Now I have to figure out how to jumper the pressure switch. I assume that this will work to keep the compressor running long enough to pull in more freon. Or should I take it to the shop?
I couldn't find a thread or youtube video on this.

Has anyone done this and can you offer some advice?

Thanks
I have to say that I'm amazed and pleased with the amount of support I've received in the past! Thank you for taking the time to help.
Harry
 

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2009 Chrysler Town and Country
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What
The A/C pressure is too low to keep the compressor running so i can charge the system. The hose I was using to charge the system leaked and I ended up with less freon than I started with...bummer.
Now I have to figure out how to jumper the pressure switch. I assume that this will work to keep the compressor running long enough to pull in more freon. Or should I take it to the shop?
I couldn't find a thread or youtube video on this.

Has anyone done this and can you offer some advice?

Thanks
I have to say that I'm amazed and pleased with

Whatthe amount of support I've received in the past! Thank you for taking the time to help.
Harry
The A/C pressure is too low to keep the compressor running so i can charge the system. The hose I was using to charge the system leaked and I ended up with less freon than I started with...bummer.
Now I have to figure out how to jumper the pressure switch. I assume that this will work to keep the compressor running long enough to pull in more freon. Or should I take it to the shop?
I couldn't find a thread or youtube video on this.

Has anyone done this and can you offer some advice?

Thanks
I have to say that I'm amazed and pleased with the amount of support I've received in the past! Thank you for taking the time to help.
Harry
What are you trying to charge it with ?
 

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Often supplying the inlet port with enough refrigerant will raise the pressure enough that the clutch will engage. If not, and you are sure you do not to much refrigerant, the compressor clutch will engage with the application of 12 volts to the connector. Polarity shouldn't matter.
 

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Discussion Starter · #4 ·
Often supplying the inlet port with enough refrigerant will raise the pressure enough that the clutch will engage. If not, and you are sure you do not to much refrigerant, the compressor clutch will engage with the application of 12 volts to the connector. Polarity shouldn't matter.
Thanks! I'll give it a try this weekend. The temps here in Minnesota have been above 90 everyday with 50+% humidity - ick! It looks like access to the compressor is from under the vehicle. Hopefully, it's not too difficult to get to.
 

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Find the compressor relay. Remove same. Numbers on bottom of relay;#30 is battery voltage...not sure,But believe #87 is comp. Jumper these 2 at connection. DO NOT jumper #30 to the computer.

Have gauges connected to both low & high ports with a can connected and ready. Be sure to evacuate the hoses after hooking up. Start engine, turn A/C on high fan, stick a thermometer in center vent, do not open gauges. Check pressure; fully charged system should read about 36 +/- on low, 250 +/- on high @ 95degree ambient with 50 degrees +/- out the vent, engine running at 1500 rpms.

If not, there is a leak. Find & fix the leak. DO NOT charge the system until all hoses are evacuated at the gauges and system. "If" the system is completely out of freon, which I doubt, pull a vacume, down to 27/28 microns for about an hour. If it holds, charge the system.

All the above is based on R 134A.
 
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