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2002 f350 v10 ac blows warm. Tried a recharge kit and shows pressure in red(high). Released pressure. Worked great for 2 days and now it's doing the same thing. Pressure in red blowing warm

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  • Cars & Trucks Master
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May be a plugged drier causing too much pressure on the high side.
what is /was the low side pressure? If in vacuum, that would be a confirmation of the cause.

Posted on May 12, 2014

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SOURCE: 2000 Jeep Cherokee Air Conditioner

If compressor isn't kicking in, check the connector atop the a/c accumulator, beside the coolant recover tank, in the engine compartment. That connector is atop a black bottle, and the connector goes to the low pressure switch. These switches do fail, and you can jump a wire across the connector terminals to see if the compressor comes on (engine running). As this circuit provides part of the ground path from the compressor clutch, if the switch is open, the compressor will never turn on. If the switch is failed, it can be replaced without opening the a/c system. Just disconnect the connector, unscrew the switch, replace it, and reconnect the connector.

Posted on Aug 08, 2008

  • 5522 Answers

SOURCE: 97 Olds Aurora AC blowing warm air a day after recharging system

Several- The system should hold freon for years without leaking. There are pressure switches and they cut off the compressor with an undercharge and an overcharge. You need guages to measure the charge. There are testers the A/C shops have called "sniffers" which can detect a leak. If you have no leak then you need a technician to add or remove freon to get the concentration right. Or you need guages.

Posted on Jun 12, 2009

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SOURCE: 2005 Dodge Durango Front AC won't blow cold, back air works great

Did anyone find the answer for this?

Posted on Aug 30, 2009

  • 1 Answer

SOURCE: why wont my heater or ac fan not blow in my car?

I'm having the same problem,and I've already checked the fuses. Is there some other possibility?

Posted on Dec 30, 2009

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SOURCE: 2004 Honda CRV air conditioning stopped blowing

Hi!

If by red lined you mean it went over the 250 psi range??

Assumiing that the answer is yes. This is what I think.

The Hi and Low pressure switches prevent damage to the compressor if the pressure is out of range.

Before going any further, check A/C Relay and fuse.

With the engine off, check pressure on both, Hi and Low. Both gauges must have same reading. It should be between 175-200 psi at about 80 degrees temp., if pressure is over that range, the Hi Pressure switch is preventing the compressor clutch to engage, gas needs to be removed by a qualifying A/C Technician.

If Pressre is between range, and both gauges read the same, start engine and turn compressor on, check gauges, The Low side should read about 38 psi and the Hi side should be between 250/275.psi.

Any more trouble shooting should be performed by a Qualified Tech.

Don't forget to rate this post!! Good Luck!!

Posted on Jul 20, 2010

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