What do you guys think of the RX-8 A/C unit on the hotest days?
05-29-2007, 12:03 PM
#52
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05-29-2007, 12:30 PM
#55
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05-29-2007, 12:46 PM
#56
2005 Black RX-8 GT 6M
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05-29-2007, 01:00 PM
#58
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My AC works well on fresh with the upper vent. We had some 100 degree days last summer. Didn't give that arctic blast that some people expect from air conditioning, but it cooled down reasonably quickly and maintained a comfortable temperature.
Ken
05-29-2007, 01:18 PM
#59
kevin@rotaryresurrection
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a useful tip..
https://www.rx8club.com/showpost.php...54&postcount=8
you will be suprised what it will do..
beers
https://www.rx8club.com/showpost.php...54&postcount=8
you will be suprised what it will do..
beers
the cycling on and off is normal. All rx-8s do it.
Every properly working (and cold) a/c system runs for 2-5 minutes and cuts off for 15-60 seconds then starts again. They only cut off because the core is getting too cold and there's no need to cool it further. They do not cycle RAPIDLY off and on without ever letting the core get cold, which is exactly what the rx-8 is doing.
If I can only figure out a way to keep the compressor running longer on the rx-8 without harming anything else, the a/c will be MUCH improved.
05-29-2007, 03:24 PM
#60
05-29-2007, 03:46 PM
#61
Thank you Rotary...I totally agree. Yes I know that an A/C system will cycle on and off. But not at 5-10 second intervals and NOT until the car has started to cool off. My A/C will start cycling almost as soon as I start driving. And this is while the car is still very hot inside. In the summer, I always have the mode set to "top vents only". And when I first get in the car, I roll down the windows for the first 1/4 mile or so to let out the really hot air. After that, with the a/c on recirculate, it really should start cooling the car down. But due to the cycling on/off, it takes forever to get the temps down. And heaven forbid I get stuck in traffic. It's totally hopeless when I'm not moving.
I'm the kind of person who does NOT like very cold air (hence the reason I live in Florida
) and I normally hate to have the a/c blowing on me because I don't like the cold air blast. However, in this car, I have them all pointed at me and i'm still hot. This is why I consider this abnormal. It really should be able to get the temps below 90 degrees in less than 15-20 mins but that's not happening.
The air coming out of the vents is cold. So I can tell the compressor is working. But it keeps turning off! If it would just stay on for a while, I think it would cool things down.
Once again, constructive suggestions are welcome.
Many thanks in advance.
I'm the kind of person who does NOT like very cold air (hence the reason I live in Florida
) and I normally hate to have the a/c blowing on me because I don't like the cold air blast. However, in this car, I have them all pointed at me and i'm still hot. This is why I consider this abnormal. It really should be able to get the temps below 90 degrees in less than 15-20 mins but that's not happening.The air coming out of the vents is cold. So I can tell the compressor is working. But it keeps turning off! If it would just stay on for a while, I think it would cool things down.
Once again, constructive suggestions are welcome.
Many thanks in advance.
05-29-2007, 05:42 PM
#63
btw i had a new a/c amp installed as per the tsb and it still cycled on and off all the time, then they flashed my a/c unit and it stopped doing that.
after the flash it doesn't do the stupid cycling but it still wont cool down the car after a full day in the heat.
after the flash it doesn't do the stupid cycling but it still wont cool down the car after a full day in the heat.
05-29-2007, 06:52 PM
#64
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I have an '04 WB with the cloth interior and tinted windows. I live in Texas where we had 102-105 degree days this past summer. My A/C worked just fine on RECIRC (which came on automatically). Did it take 5-10 minutes to cool down? Heck yeah, it was HOT outside, but once it got cooled down, it stayed cool. I also use a front windshield reflective screen when I am parked. It sure seems like the quality of Mazda's A/C units is not too consistent. I am just glad I got one of the good ones!
05-29-2007, 08:18 PM
#65
Thanks for the link and suggestion. But...I am a mechanic and engine builder...I am not stupid. I know how to set a/c controls to max. Even when this is done, the air gets cool then warm, cool then warm, as the compressor cycles on and off at perfect ~5 second intervals. This happens at idle or driving 55mph down the road.
That MAY be normal operation for rx-8 cars, but it is NOT normal operation for car a/c systems in general. Ive owned and worked on hundreds of FC and FD rx-7s, a millenia, s-10, older Denali, current Denali, silverado, grand am, escort, the list goes on.
That MAY be normal operation for rx-8 cars, but it is NOT normal operation for car a/c systems in general. Ive owned and worked on hundreds of FC and FD rx-7s, a millenia, s-10, older Denali, current Denali, silverado, grand am, escort, the list goes on.
did not call you stupid,, but the button push link stops the constant cycling.. you have to reset the amp after a bat disconnect... i thought it was just an 04 thing.
beers
Last edited by swoope; 05-29-2007 at 08:44 PM.
05-29-2007, 09:00 PM
#67
kevin@rotaryresurrection
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fwiw my car is an 8 or 9 of 04 build so the a/c cant be programmed per that link.
my compressor cycles every 5 seconds regardless of vent selection or fresh/recirc selection. Sometimes at idle it will switch less often, say 15 seconds, but it switches more often while driving.
my compressor cycles every 5 seconds regardless of vent selection or fresh/recirc selection. Sometimes at idle it will switch less often, say 15 seconds, but it switches more often while driving.
05-29-2007, 09:03 PM
#68
fwiw my car is an 8 or 9 of 04 build so the a/c cant be programmed per that link.
my compressor cycles every 5 seconds regardless of vent selection or fresh/recirc selection. Sometimes at idle it will switch less often, say 15 seconds, but it switches more often while driving.
my compressor cycles every 5 seconds regardless of vent selection or fresh/recirc selection. Sometimes at idle it will switch less often, say 15 seconds, but it switches more often while driving.
05-29-2007, 09:05 PM
#69
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Sacramento County, Ca foothills 06 RX8 AC has been fine over the last week with unofficial temps in the mid 90's (RX8 ambient temp reading)
.
Only owned since November so it hasn't been subjected to 105 -106 week long temps we can get.
. Only owned since November so it hasn't been subjected to 105 -106 week long temps we can get.
05-29-2007, 09:15 PM
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Does anyone have the performance test procedure for the 8? (every car is different, it will have the procedure and a chart to tell pressures at different temps). My 8 cycles and has had the revised a/c amplifier. I am a DCX tech, but my 8 tech (still under warranty) told me the control head wont do much and that the system is just weak (shitty was his exact words). If anyone has the procedure, send it to me and ill see if it passes Mazdas specs.
05-29-2007, 11:37 PM
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