a/c compressor

[se2bsw]

Originally Posted by HotZ28

I assume that you have auto climate control (ACC)? If you do, does the temp stay the same, no matter what temp you select? Also, can you feel any change in air movement when manually moving fan speed up or down? There is a "sun sensor" on the dash that has an affect on air flow through the vents on the ACC system, if that is what you are referring to, however, it is not likely to be your problem though. How long have you had this car and did this problem just appear recently?

hi hot, im totally baffled here....i just tryed chargin the system, and the compressor came on..for a sdhort time and shut off again. but inside the casr the ac was on and the blower was on..and i put it on full, and it blew full air out. i did notice that when i was trying to charge the system, there was the change in engine movement., and the fans in front of the compressor was also on. but the compressor stayed off. im wondering if theres something else im missing here as im told the compressor, if it was dead, wouldnt just come alive when it choose to. if it dead its dead. could the condenser"tank" switch be faulty perhaps..? could it have something to do with that prevviuosly mentioned switch..? tyvm in advance.

[HotZ28]

Most of the older cars (pre 96), have a switch in the low pressure side of the system which opens at about 24 psig, cutting off the compressor. The evaporator warms up, and when the pressure reaches around 40 psig, the switch closes again, restarting the compressor. If you are using R-134a and have not changed the switches, the pressure is still set for the R-12 system!

You did not mention whether or not you had cool air when the compressor was on, so I have to assume that you did not. Based on that assumption, it sounds like you have a blocked orifice screen in the high side line. Usually, a blocked orifice screen is caused by internal compressor failure often referred to as “black death”! This condition will exist when the orifice screen is blocked and the refrigerant can not pass through the orifice. Low side pressure will usually never drop below 50 to 60 psig and the high side pressure could rise above the switch limit, thereby shutting down the compressor.

Also, when the AC is selected on the ACC control pad, the radiator fan should turn on and the engine RPM should increase. If you have a blocked orifice screen, the compressor will make some abnormal noise and it will seem that the engine is struggling to operate the compressor. I.E. noise, vibration etc.

You need to take your car to an AC shop that can diagnose the problem using the proper equipment to test the high and low side pressures!

[se2bsw]

Originally Posted by HotZ28

I assume that you have auto climate control (ACC)? If you do, does the temp stay the same, no matter what temp you select? Also, can you feel any change in air movement when manually moving fan speed up or down? There is a "sun sensor" on the dash that has an affect on air flow through the vents on the ACC system, if that is what you are referring to, however, it is not likely to be your problem though. How long have you had this car and did this problem just appear recently?

Hi hot, ok took my car into shop, and was told by2 independant ac mechanics that my compressor was shot(one got a reading of 80-30, the other put a stethoscope on the compressor and told me there was a leak in it, his lil machiny went off). ok my question is this. is it that difficult to take this compressor out, or does a specialized mechanice need to do it. if i can do my self id like to, u have any feedback on whats all involved in taking it out. tyvm in advance.

[HotZ28]

http://http://www.automotiveforums.c...d.php?t=555021

Some recent discussion in the link above on compressor R&R in the LeSabre forum, same procedure applies here!
You will need the proper equipment to evacuate, flush & charge the system. The orifice screen is in the high side line coming out of the condenser. You must change that and the accumulator/drier also! Do not, and I repeat, do not try to change just the compressor without the other components along with proper flush and evacuation!! If you do, the new compressor will fail "sooner than later"!! You could flush the system (if you know how) and replace all the parts, then take it to the AC shop for evacuation and charging.

Another link with some good info:http://www.automotiveforums.com/vbul...d.php?t=570474

[se2bsw]

Originally Posted by HotZ28

I assume that you have auto climate control (ACC)? If you do, does the temp stay the same, no matter what temp you select? Also, can you feel any change in air movement when manually moving fan speed up or down? There is a "sun sensor" on the dash that has an affect on air flow through the vents on the ACC system, if that is what you are referring to, however, it is not likely to be your problem though. How long have you had this car and did this problem just appear recently?

hi Hot, ok i had the compressor put in professionally, but the air still doesnt work. the compressor comes on, however the clutch does not. the guy who put it in thinks its the switch, any ideas on this oner..tyvm in advance.

[HotZ28]

Did your mechanic reset the ACC controller so you do not have a flashing light on the temp display when you start the car? If so, you need to verify whether or not you have a full 12V to the clutch coil assembly, when the controls are set for AC. I am surprised that the mechanic did not check that! Have him check it for you, if you are not familiar with the procedure.

[se2bsw]

Originally Posted by HotZ28

I assume that you have auto climate control (ACC)? If you do, does the temp stay the same, no matter what temp you select? Also, can you feel any change in air movement when manually moving fan speed up or down? There is a "sun sensor" on the dash that has an affect on air flow through the vents on the ACC system, if that is what you are referring to, however, it is not likely to be your problem though. How long have you had this car and did this problem just appear recently?

Hi Hot, yes he did reset the acc control, so theres no flashing light. he did tell me i could try the relay switch, as he says theres NO power, after the black switch that goes on the condenser. He beliefs its in between the ac button in the car, and that black plug that goes onto the condenser. as for checking the voltage to the compressor, he did not. he did tell me the ac went on for bout 5 min, and shut off. tyvm in advance.
Is the relay switch for the ac second to the left on the passenger side...theres two on the left side, and 3 on the right side...

[HotZ28]

Relays, in order left to right on the ACC system;
A/C
Horn
Blank
Blank
ABS pump
ABS main
High cooling fan
Low cooling fan

If you want to test the relay, just change it with one of the others, they are all the same type. There is not a "black plug going to the condenser" you must be referring to the compressor? Did the mechanic flush the system, change the orifice screen and accumulator and suck down the system?

[se2bsw]

Originally Posted by HotZ28

Relays, in order left to right on the ACC system;
A/C
Horn
Blank
Blank
ABS pump
ABS main
High cooling fan
Low cooling fan

If you want to test the relay, just change it with one of the others, they are all the same type. There is not a "black plug going to the condenser" you must be referring to the compressor? Did the mechanic flush the system, change the orifice screen and accumulator and suck down the system?

Hi hot, the relay switch was the problem, ac now working. thanks. what im wondering now is the amount of cold air cooming out of the vents isnt in my opion very high. i even switched the relay switches for them thinkin it might be that. is there anything else i can look for as for air flow, im not complaining, just wondering if air flow can be more significant. tyvm in advance. i surely appreciated all ur help hot.

[HotZ28]

On your ACC controller, you have "auto" fan control and "high & low". See pic above. (Lower row, three buttons in the middle). You can override the auto by pressing "high" to increase fan speed or pressing "low" to decrease speed. You do not have "relays" for the AC blower on the ACC system; it uses a solid-state control module. Run your fan up to “high speed” manually and see if the air flow is any better. If the fan is set in the “auto” mode, speed will increase & decrease, based on feedback from the network of sensors in the ACC system.

[se2bsw]

Originally Posted by HotZ28

I assume that you have auto climate control (ACC)? If you do, does the temp stay the same, no matter what temp you select? Also, can you feel any change in air movement when manually moving fan speed up or down? There is a "sun sensor" on the dash that has an affect on air flow through the vents on the ACC system, if that is what you are referring to, however, it is not likely to be your problem though. How long have you had this car and did this problem just appear recently?

Hi hot, ok i did what u said, actually done this already previuosly...is it possible the passage ways are partially blocked by foreign debris(nest,etc). if so would blowing air in from the inside to outside eleviate this...?im running out of thought/ideas here...has this ever happened to you..? the blown air can only be felt til in behind the sterring wheel..and itsnot powerful either....tyvm in advance.

[HotZ28]

You could have a partially blocked evaporator or, blender door actuator malfunction. Turn the system off-on several times in paused succession while listening for a clicking sound coming from under the passenger side dash. It is not likely that you have a "rodent nest" in the evaporator box, however, you could have "tree trash" or other debris blocking the air flow. Could you describe the air coming out of the vents as, "cold"?
You will have no luck trying to blow air from the "inside to the outside".

[se2bsw]

hi hot, as for the air it is cold. i will see if the guy who installed it can have a peak at what u were refering to, before i start diggin around for tree stuff. tyvm in advance. i guess i should be greatful for what i have for cold air..now.
Ok, i have spoken to him bout that blender door actuator, and hes telling me that its an eletrical problem, once again. is this true. and if so how , what do i do, as he says its beyond his professionlism?...beginning sounds like the tree thing would be easier to fix!!!

[HotZ28]

Originally Posted by se2bsw

the blown air can only be felt til in behind the sterring wheel..and itsnot powerful either....tyvm in advance.

Are you saying that you do not have air blowing out the dash vents and that it is blowing out the defrost & floor vents?

[se2bsw]

Originally Posted by HotZ28

I assume that you have auto climate control (ACC)? If you do, does the temp stay the same, no matter what temp you select? Also, can you feel any change in air movement when manually moving fan speed up or down? There is a "sun sensor" on the dash that has an affect on air flow through the vents on the ACC system, if that is what you are referring to, however, it is not likely to be your problem though. How long have you had this car and did this problem just appear recently?

Hi hot, sorry i havent gotten back to you in couple days, i was waiting on the guy who put compressor in to floow up and "go inside and have a look" at the area of the actuator door and soon to see if it was some how being restricted. his other suggestion if it wasnt blocked was gettin another control panel, and trying that. well hes being sick, so my thought was if its not to hard i can try doing that, looking into the inside of the actuator area, under/behind the the dashboard. what im wondering is were do i start, if i attempt this?....is it as simple as taking out the compressor?..or way more to this procedure. maybe u have some tricks upo your sleeve for this?..tyvm in advance.