Question about 1991 Honda Accord

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WHERE IS THE LOW PRESSURE AC LINE? - 1991 Honda Accord

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Low pressure A/C lines are always thicker than the high pressure lines.

Posted on Jul 03, 2010

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Is the low pressure side of 92 F-150 on the condenser or near the compressor.


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1 Answer

Need to recharege ac where is the low pressure vale


it will be on the ac lines. the smaller line is the high pressure line and the larger line is the low pressure line. it is probably near the canister shaped part that the aluminum lines to into.

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1 Answer

AC freezes up after running two hours.


If it actually is freezing up,the low pressure switch is the likely cause.It is screwed into the large ac line near the firewall,witch is the cold line.If it is not there it is in the dryer,near the firewall,or under the air filter box.Follow the ac line(large ac line/hoses)from the ac compressor untill you come to the switch,that is the easy way to locate it.This low pressure switch causes the ac compressor to cycle on and odd according to the pressure sensed from the ac low side line.When it gets really cold the pressure is lowered,and there for it will cut off,and when the pressure rises,it cuts the ac compressor back on.It would be a really good idea to check the freon in the vehicle first.If the ac system is low on freon,it will freeze up on some vehicles.

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Location of low side pressure value for a/c


low pressure line from the AC compressor, that is the larger line of the two lines comming from the AC compressor

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4 Answers

Where do I recharge ac at


there are 2 ports one for low pressure and one for high pressure. the low pressure is bigger in diameter and is usually close to the dryer and or fender and firewall. the high pressure is near the condensor on the fron of the vehicle. if there are caps for the ports low will be blue and high will be red. low side pressure should be 35-50 psi and high pressure should be 135-150 psi

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AC has stopped blowing cold air. Compressor is working. Where is the recharge valve located?


There are two A/C refrigerant lines. The small line is your high pressure line and the larger line is your low pressure line.
Start at the fire wall and follow the "large " low pressure line to the compressor. The low pressure charge port will be some where on that line.
DO NOT try to recharge on the high pressure side ( small line )
Good luck, let me know.
Regards,

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