89 S10 Blazer a/c-constantly cycles
airwinger
08-14-2007, 08:40 AM
Hello,
The air conditioning (compressor) constantly cycles on and off, on for approx. 5 seconds - off for approx. 15. Blows cold air and "feel" cks. seem ok. Had a friend put the guage to it and the freon is good. The problem has existed for it's second summer now.
The Haines manual doesn't tell me much and it doesn't appear that there is a sensor quick fix.
Any suggestions are appreciated, thanks -- Bob.
1989 S10 Blazer/4.3 litre/2WD/113,500 original, owned since new
The air conditioning (compressor) constantly cycles on and off, on for approx. 5 seconds - off for approx. 15. Blows cold air and "feel" cks. seem ok. Had a friend put the guage to it and the freon is good. The problem has existed for it's second summer now.
The Haines manual doesn't tell me much and it doesn't appear that there is a sensor quick fix.
Any suggestions are appreciated, thanks -- Bob.
1989 S10 Blazer/4.3 litre/2WD/113,500 original, owned since new
MT-2500
08-14-2007, 09:08 AM
Hello,
The air conditioning (compressor) constantly cycles on and off, on for approx. 5 seconds - off for approx. 15. Blows cold air and "feel" cks. seem ok. Had a friend put the guage to it and the freon is good. The problem has existed for it's second summer now.
The Haines manual doesn't tell me much and it doesn't appear that there is a sensor quick fix.
Any suggestions are appreciated, thanks -- Bob.
1989 S10 Blazer/4.3 litre/2WD/113,500 original, owned since new
Is this a R-12 system or converted to R-134a?
That is usually low gas or a bad pressure switch.
What was the low and high side pressure readings at idle and at 2K.
Post back pressure readings.
MT
The air conditioning (compressor) constantly cycles on and off, on for approx. 5 seconds - off for approx. 15. Blows cold air and "feel" cks. seem ok. Had a friend put the guage to it and the freon is good. The problem has existed for it's second summer now.
The Haines manual doesn't tell me much and it doesn't appear that there is a sensor quick fix.
Any suggestions are appreciated, thanks -- Bob.
1989 S10 Blazer/4.3 litre/2WD/113,500 original, owned since new
Is this a R-12 system or converted to R-134a?
That is usually low gas or a bad pressure switch.
What was the low and high side pressure readings at idle and at 2K.
Post back pressure readings.
MT
airwinger
08-14-2007, 10:43 AM
Hello MT,
The system is R12, unfortunately I don't have low and high readings nor availability of the equipment to check it again. Can you tell me where the switch is located and does it require vacating the system to change?
Thanks for your reply, Bob
The system is R12, unfortunately I don't have low and high readings nor availability of the equipment to check it again. Can you tell me where the switch is located and does it require vacating the system to change?
Thanks for your reply, Bob
MT-2500
08-14-2007, 11:45 AM
The low pressure switch is on the accumulator. The big can.
If pressure is dropping below 25-26 lbs it is normal for it to shut off compressor.
But unless you just want to throw parts at it you need to check the pressure reading to see if it is the switch or just low on R-12 or bad wirng.
Also the wiring plug on the switch needs checked.
The switch just screws off and on.
There is a Schrader valve and a o ring seal to hold back pressure.
If pressure is dropping below 25-26 lbs it is normal for it to shut off compressor.
But unless you just want to throw parts at it you need to check the pressure reading to see if it is the switch or just low on R-12 or bad wirng.
Also the wiring plug on the switch needs checked.
The switch just screws off and on.
There is a Schrader valve and a o ring seal to hold back pressure.
airwinger
08-16-2007, 03:44 PM
Hello,
Final note for this thread - Turns out that I have a restricted dryer orifice tube -- Aww Crud!
Final note for this thread - Turns out that I have a restricted dryer orifice tube -- Aww Crud!
MT-2500
08-16-2007, 04:05 PM
Hello,
Final note for this thread - Turns out that I have a restricted dryer orifice tube -- Aww Crud!
If it has a lot of crud in it it may be from the compressor going out.
Good Luck.
MT
Final note for this thread - Turns out that I have a restricted dryer orifice tube -- Aww Crud!
If it has a lot of crud in it it may be from the compressor going out.
Good Luck.
MT
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