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06-06-2010, 01:21 AM | #1 | |
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Air Conditioner Compressor Cycling On and Off
i have a 1993 chevy silverado with a 350 and i was trying to get the A/C to run cold,i put some refrigerant in the low side and it said that it was full.now the ac blows cool but not cold and the A/C compressor turns off and on in 10 second increments.i was wondering if i need to get a new compressor or what
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06-06-2010, 06:40 AM | #2 | |
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Re: Air Conditioner Compressor Cycling On and Off
having the pressures stated would help- but typically you are still low on refrigerant-- a gage cannot tell you if it is full- rapid cycling is an indicator of loss of refrigerant.
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Automotive A/C Engineer with: '99 IH 4700 Toy Hauler (2) '95 GEO Prizms both maroon '99 GMC Yukon '95 Chev 3500, 454 Dually Crew Cab- 145k miles- Wife's Camel trailer puller. '94 Astro- 370k miles '94 Firebird Formula- 5.7L 180k miles- gone- '92 Chevy Lumina Van 3.8L 264k '86 GMC S-15 - 2.8L 154k '87 Buick Park Ave . 187k '86 Buick Park Ave 3.8L 199k miles- gone '77 Chevy Vega- 2.5L 175k miles gone but not forgotten '68 Camaro 396 4 spd RS/SS -72k miles- |
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06-06-2010, 08:30 AM | #3 | ||
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Re: Air Conditioner Compressor Cycling On and Off
Quote:
what refrigerent are you using ? what is the OEM refrigerent listed for this a/c.. |
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06-06-2010, 02:25 PM | #4 | |
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Re: Air Conditioner Compressor Cycling On and Off
i am using r1234 refrigerent(it's been converted over)
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06-06-2010, 02:29 PM | #5 | |
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Re: Air Conditioner Compressor Cycling On and Off
the pressure is 45 psi, right before the yellow
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06-06-2010, 03:14 PM | #6 | |
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Re: Air Conditioner Compressor Cycling On and Off
since this was designed for the R12 the coils , the spaces between the coils are futher apart ..this reduces cooling efficiency with the conversion R134.
the coils being clean make a big difference .. the switch ,,,the low pressure switch ,,with your pressure guage reading the low side pressures..with this connected this should not drop out with pressures above 5-10 psi..if the compressor shuts off at pressures above 5-10 psi jump out the switch and see if the switch is causing this..these switches do fail when they have been in service a long time.. |
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06-06-2010, 08:55 PM | #7 | ||
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Re: Air Conditioner Compressor Cycling On and Off
Quote:
i have not checked to see what the psi is when it turns on and off put i have jumped it off and the psi is 12(that's how i put the stuff in it,because it would not turn on by itself with out me jumping it off) |
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a/c , air , compressor , conditioner |
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