How often does your A/C compressor cycle? (1 Viewer)

[94landcruiser]

Yesterday in 90 degree heat I waited for my Wife and timed the cycling. At first it was about 1 minute on, 25 seconds off.

After 5 minutes it stayed on for about 10 minutes and went off for less than 10 seconds. After that it stayed on.

Vent temp was 39 degrees per my Fluke.

 

[sjcruiser]

Coincidently while I was waiting for the wife yesterday(carpooling everyday), I counted the AC cycle out of boredom...45 seconds on 15 seconds off and repeat...The car had been cooled down before; thus the cycles are pretty much repeatable with the same timing to keep the interior cooled to preset 73F at around 85-90F ambient temperature, all with the auto-climate control functioning.

P.S: From what I know, quick cycling is also a sign of low/marginal freon. Have your system checked, Eric.

 

[e9999]

Yesterday in 90 degree heat I waited for my Wife and timed the cycling. At first it was about 1 minute on, 25 seconds off.

After 5 minutes it stayed on for about 10 minutes and went off for less than 10 seconds. After that it stayed on.

Vent temp was 39 degrees per my Fluke.

interesting that the cycling would go away...

39 is pretty cold. This is with R-12?

 

[e9999]

Coincidently while I was waiting for the wife yesterday(carpooling everyday), I counted the AC cycle out of boredom...45 seconds on 15 seconds off and repeat...The car had been cooled down before; thus the cycles are pretty much repeatable with the same timing to keep the interior cooled to preset 73F at around 85-90F ambient temperature, all with the auto-climate control functioning.

P.S: From what I know, quick cycling is also a sign of low/marginal freon. Have your system checked, Eric.

yes, I probably am a bit low. Can't connect the dang gauges....

 

[94landcruiser]

I have no idea, it has whatever it has. I doubt it has been converted so I assume it has whatever was stock. Aren't the connectors different between r12 & 134?

I can post a picture if they are.

 

[sjcruiser]

I believe the R134 low pressure valve is a bigger quick disconnect type with a blue cap; whereas the R12 counter part is a threaded one and a green cap. I also think that a refrigerant type sticker is mandated if conversion is made. Look around under the hood for it.

 

[94landcruiser]

I have no stickers but I seem to have a semi blue large cap. The upper connector had nothing covering it so I used the only thing that I had that stayed, a stereo RCA cap.

 

[Tools R Us]

That's R134A.

 

[94landcruiser]

Alrighty then. Was it standard on late 94's?

thanks!

 

[e9999]

odd...
today while futzing with the A/C on a long freeway drive, I saw that the A/C was cycling on the Lowest fan position but not on the others. In fact, it would get colder (down to 38F) on the second to lowest position.

 

[mason]

Should have used the magical words when searching before I posted my question (different thread).

O.K., so the system won't (or shouldn't) cycle on and off on really hot southern New Mexico days of 100 degrees. Mine isn't.

But, it's also getting colder than it ever has, and I'm all of a sudden loosing 1/2 inch of coolant every couple of days here, and according to e9999's other thread on coolant loss, that amount is a bit excessive.

I know my OEM temp gauge isn't exactly accurate, and has never gone from middle, but my clutch fan hasn't ever come on in the two years I've owned the rig.

Probably need to start there.

-Eddie