Question about 2001 Nissan Sentra

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Sentra a/c not working

Just replaced the compressor and high pressure line (& dryer), pulled vacuum and held it (no leaks), recharged system but compressor & fans will not turn on now. There is also no high pressure, just low pressure. Even with the engine off there is still zero high pressure, so I'm assuming the pressure switch is not letting the system turn on because there is no pressure.

Before I installed it I filled the compressor with PAG100 oil, and 3oz was all I was able to get in. Is this oil preventing the freon from circulating and causing a blockage? Why would I be getting zero high pressure?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 93 Nissan sentra air conditioning

Sounds like your ballast resistor is out for the blower motor. You said that you only had 1 speed or off when you turned the fan on. The fan's speeds are made possible by a separate resistor installed on the heater box. The dash switch itself will only work at one speed when the resistor isn't functioning; and eventually the switch will burn out too. The resistor is much easier to change out than the blower motor was, and cheaper too. You can find it on the heater core/blower box by the passenger side footwell You can order the resistor for around $25.00 from a Nissan dealer, the switch itself costs about the same, verses around $90 for the blower motor.. It took me all of 20 minutes to change them out in my Nissan. I really hope you kept your receipt for the new blower motor, because it was probably fine. I'm not sure what you mean about the automated seat belt fuse. I know there is a sensor in each seat that causes the seatbelt indicator light to flash until you plug the belt in. There are 2 wiring harnesses, one for the seat that can tell when weight is on the seat, the other one shuts off the dash indicator when you plug the belt clasp in. Good luck...

Posted on Jul 06, 2008

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SOURCE: 99 nissan sentra headlamp - hi beam low beam issues

could be the switch. did you do anything to the switch when you changedheadlamps? maybe you put the lamp in incorrectly also did the brights work on the lamp that was "burned out"?

Posted on Jan 29, 2009

moparownr
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SOURCE: A/C will not work 03 Frontier

Well try it now, and I'm glad you were able to get it fixed, rats eat some of the most unusual stuff! Thanks in advance for the rating!

Posted on Apr 06, 2009

goalie39
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SOURCE: Oil Leaking slightly from engine block

Could be some thing as simple as a leaking filter, drain plug, or oil pressure sending unit. If it hasn't been in for an oil change lately, take it in, mention you have seen drops on the driveway, the tech will likely note the leak and possible solution. From this you can determine the cause and cost.

Posted on Apr 14, 2009

  • 4 Answers

SOURCE: 1997 Nissan Hardbody has rough idle/surges/stalls

the 2001 altima is what i have and I had the same problem as you. turned out to be a bad head gasket factory used cheap ones for a few years before they found the problem. one way to test this is to get a can of carborator cleaner and spray it around the area where the head meets the block under the intake problem should be around the 4th cylinder or close to driver side. if the head gasket is bad the rough idle will smooth out while you are spraying the head.

Posted on Aug 06, 2009

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2 Answers

A/C in my car


Two things pop immediately to mind...

but before even going there... be VERY CAREFUL 275 pounds seems terribly high for an '89... If something cuts loose at that pressure you best have all your helmets, flak jackets, gloves, glasses & cups on... (I'm just saying).

Pressure line should be hot and suction line should be cool... coming back to the compressor.. Yes...??

Lets get to the two things on my mind:

1. Malfunctioning Heater-A/C baffles cause lotsa grief.

2. Drier: Desiccant saturation by exposure to atmospheric moistures... replace or attempt recovery by pulling & holding a SERIOUS vacuum before re-charging your system.

ELSE: Ice crystals will form at the "ORIFACE" and PROFOUNDLY AFFECT PERFORMANCE...

PLEASE Note.
Pulling & holding a 29 vacuum also certifies your main compressor seal (ergo... refrigerant & lubricant will remain intact)... Any trace of OIL BUILD-UP on the front of the COMPRESSOR (or inside the hood in alignment with your compressor pulley) should be addressed... oil level checked & augmented (only as needed)).

Hope this helps

Seal

http://www.rockauto.com/en/catalog/mercury,1989,grand+marquis,5.0l+302cid+v8,1199505,heat+&+air+conditioning,a/c+compressor+seal,6676 More Information for MOTORCRAFT YE57

Drier

More Information for SPECTRA PREMIUM COOLING DEPOT 0233168

Jul 17, 2016 | 1989 Mercury Grand Marquis

2 Answers

I have a po532/po533 replaced the whole system less evap. Core performed evac it held 29in i recharge the system to one pound fourteen oz and system is cold excellent pressure high and low shut off a half...


There is a lot more to it than that. This is why the service bill is so high. Did you replace the Orifice tube or expansion valve? Did you replace the receiver/dryer? Did you flush the whole system out with solvent? Did you put the oil back in?

The proper steps are:

1. Remove any Freon with a recovery station.
2. Isolate and remove the compressor.
3. Remove and discard the receiver/dryer.
4. Remove and discard the orifice tube/expansion valve.
5. Flush the system with solvent and catch the discharge to check for rust and debris. If any are found, replace the whole system.
6. Replace the orifice tube / expansion valve with new one.
7. Replace the receiver/drier with new one.
8. Replace the oil in the system with fresh oil in the right amount.
9. Connect all compressor fittings on the compressor.
10. vacuum the unit down for at least 4 hours.
11. Recharge the system. Check performance and leaks.

Aug 09, 2014 | Cars & Trucks

1 Answer

I have not recharged a system in a while. If the system is out of freon will the compressor still turn to pull in the refrigerant.


It should take the freon . Compressors will actually pull a vacuum if the refrigerant
is completely exhausted. You should be able to recharge system if the unit is just low
on refrigerant.

If no pressure is in system, I would have the accumulator replaced and
have a vacuum pulled on the system before recharging it. (The accumulator has a
dessicant/ filter in it and may become clogged if the system is empty)
The vacuum is to boil off any moisture in the system
from having it open and also to check for leaks. If moisture enters the system because of a leak then it can freeze in the metering
device when the system is recharged. I hope this helps.

Jul 23, 2011 | 1999 Buick Regal

1 Answer

A/c repairing


You have an obstruction in the line. Recover and evacuate the system of refrigerant. Open up the line and remove the obstruction or replace that line.
Then pull a vacuum to at least - 20hg's for 10 minutes . Test the system for leaks by turning off the vacuum pump and making sure the gauge doesn't move for one minute . recharge and hope for the best.

Apr 13, 2010 | 1991 Oldsmobile Eighty Eight

1 Answer

My ac wont work


Must be Air-Condition System Lines/ Hoses leaking R12 Freon (gas).

MAYBE THE PULLY HUB BEARINGS FAILED OR
DUE TO VERY LOW R12 FREON (GAS ) will not work.
Because there is a switch in the receiver/dryer prevent AC from working when low R12 Freon present, to protect the system & compressor damages.

You must fix the leaks, before recharging it.

They must **** the old (residue) gases from the system & lines / hoses...... & stay in the vacuum pump 30 minutes to proof no more leaks.

Recharge some oil for the old type R12 Freon gas.

Before recharge it to 62-67 psi R12 Freon

See the web site like www.youtube.com/video site to see How they service & repair air-condition system?
Put the question to their search window.

This is the question u should.
How they service & repair air-condition system?


Regards;
MAR

Aug 04, 2009 | 1994 Cadillac DeVille

1 Answer

Ac not working Dodge ram 2500 diesel


compressor is shot ,replace it and dryer orfice tube or exspansion valve

Jun 29, 2009 | 2004 Dodge Ram 2500

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I need to take the a/c compresser out and I've never done it before. It's in a 2002 Z71 8 cyl


Connect gauges and bleed system off,then remove belt and ac lines from compressor.Just simple nuts and bolts from there.

Jun 19, 2009 | 2002 Chevrolet Silverado 1500

2 Answers

AC Wont charge after replacing components


whenever the ac system has been opened it should be hooked up to a vacuum pump designed to evacuate the ac system of any foreign debris and oil etc and after should be able to hold a vacuum to show that there are in fact no leaks then if all is ok at this point you can then charge your ac with the proper freon specified for you car when the pressure reaches satisfactory level the ac compressor will then cycle on you should not bypass the low pressure switch

May 30, 2009 | 1999 Chrysler Town & Country

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