AC cyclically ON and OFF?
04-13-04, 04:09 AM
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AC cyclically ON and OFF?
I thought it was normal, but after reading some posts related to Power FC and AC I think now it is not:
my AC ALWAYS cyclically turned on and off in all 4 settings of the blower, 100% sure in the first two, not in 3 and 4 'cause I seldom use them
anyway, it has a fixed period,
but it stays fixed on if I engage the air recycle switch
May this be a spec of the European version?
or just a problem in my AC?
my AC ALWAYS cyclically turned on and off in all 4 settings of the blower, 100% sure in the first two, not in 3 and 4 'cause I seldom use them
anyway, it has a fixed period,
but it stays fixed on if I engage the air recycle switch
May this be a spec of the European version?
or just a problem in my AC?
04-13-04, 07:05 AM
#3
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Sounds like your a/c charge is high or low. The system has pressure switches that will shut the compressor off if the pressures are out of whack. Have you checked the a/c with pressure gauges? I bet you're only a little low on freon.
04-13-04, 07:29 AM
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Yes could it be what you both say
but it is really strange
I can measure the time of on/off and will let you know, it is strange that if I turn on the recycle it stays on...
but it is really strange
I can measure the time of on/off and will let you know, it is strange that if I turn on the recycle it stays on...
04-13-04, 08:50 AM
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captain combo post man. i couldnt find anything in my searches so i just kinda live with it. problem is that my pfc will start to adjust to the on/off and makes my cars rev go up and down also...really annoying. so free bump because i want to fix this on my car also. i am going to go check my freon levels later also.
04-13-04, 10:30 AM
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I agree with Damon. When I had my a/c recharged, it cycled on/off. After searching here, I found that this happens when the a/c system is charged with too much freon. Apparently there are a few different a/c systems that have different capcities of freon throughout the model line. In 93 there were 2 or 3 different compressors alone.
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04-13-04, 10:31 AM
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Its the voltage problem seen by PFC. Look at post by zerobanger in the PFC forum.
Also the on/off switch is called by the thermoswitch in the blower, behind glove box. If its cold enough, then it will let the AC off, vice versa.
Also the on/off switch is called by the thermoswitch in the blower, behind glove box. If its cold enough, then it will let the AC off, vice versa.
04-13-04, 11:20 AM
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reza,
that isnt causing my problem because i had that replaced with a new one. also i got lucky with my pfc because all my ac settings work. or rather i should say worked. my evaporator core went bad so i had it replaced along with the thermoswitch and changed to r134 from my old r12 setup. worked great before the swap and worked well for a few months afterwards. then the problem became apartant. didnt metter to me though since it was a nice cool winter here in florida. so now that summer is here i want to get it working again. my ac will turn on/off about every 2-3 seconds.
that isnt causing my problem because i had that replaced with a new one. also i got lucky with my pfc because all my ac settings work. or rather i should say worked. my evaporator core went bad so i had it replaced along with the thermoswitch and changed to r134 from my old r12 setup. worked great before the swap and worked well for a few months afterwards. then the problem became apartant. didnt metter to me though since it was a nice cool winter here in florida. so now that summer is here i want to get it working again. my ac will turn on/off about every 2-3 seconds.
04-13-04, 11:21 AM
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reza,
that isnt causing my problem because i had that replaced with a new one. also i got lucky with my pfc because all my ac settings work. or rather i should say worked. my evaporator core went bad so i had it replaced along with the thermoswitch and changed to r134 from my old r12 setup. worked great before the swap and worked well for a few months afterwards. then the problem became apartant. didnt metter to me though since it was a nice cool winter here in florida. so now that summer is here i want to get it working again. my ac will turn on/off about every 2-3 seconds. i think for other people though you are correct about the voltage problem. seems to be a hit or miss for the pfc to work.
that isnt causing my problem because i had that replaced with a new one. also i got lucky with my pfc because all my ac settings work. or rather i should say worked. my evaporator core went bad so i had it replaced along with the thermoswitch and changed to r134 from my old r12 setup. worked great before the swap and worked well for a few months afterwards. then the problem became apartant. didnt metter to me though since it was a nice cool winter here in florida. so now that summer is here i want to get it working again. my ac will turn on/off about every 2-3 seconds. i think for other people though you are correct about the voltage problem. seems to be a hit or miss for the pfc to work.
04-16-04, 11:17 AM
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https://www.rx7club.com/showthread.p...hreadid=279453
Someone found a solution.
Your problem is quite common. It was originally thoguht that only R1s had problemw with Power FC's and A/C's.
On my particular car A/C works on 1 and 2, almost never on 3, and on 4 it is also cyclically on/off as you discribe. However my A/C light it ALWAYS on, i only know that the a/c is continually switching on/off because off the a/c readout in the power fc menu.
Someone found a solution.
Your problem is quite common. It was originally thoguht that only R1s had problemw with Power FC's and A/C's.
On my particular car A/C works on 1 and 2, almost never on 3, and on 4 it is also cyclically on/off as you discribe. However my A/C light it ALWAYS on, i only know that the a/c is continually switching on/off because off the a/c readout in the power fc menu.
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