AC wont stay on Help!, Help! Options

[thatSt204guy]

So the problem is, when i turn on my AC is only stays for about 3 seconds and then it just shuts off. I can feel it blowing cold air and I just replaced the AC relay, so could it be a problem with the compressor or some kind of sensor??

Forgot to mention that the light also blinks off and on before it shuts down.

Any help is appreciated!

This post has been edited by thatSt204guy: Mar 17, 2015 - 5:33 AM

[VavAlephVav]

Low pressure cut off switch. It means you're low on refrigerant.
There is also a sight glass on top of the filter/dryer(small cylinder near bottom left of radiator).
When you're charged up good you won't see any bubbling in the sight glass.


This post has been edited by VavAlephVav: Mar 17, 2015 - 3:50 PM

[thatSt204guy]

Is there any other problem you can think of because I had it recharged and checked for leaks last week??

[Box]

I'd call the place you had it done and explain what's going on. They should offer to take care of it.

[Bitter]

It could even be overcharged and the high pressure cut out, especially if there's a blockage in the system like a plugged orifice tube.

[nics]

Is the AC button blinking after it shuts off?

[thatSt204guy]

Well it was professionally recharged but is there a way to let pressure out without letting out all the gas?

I also found this http://www.6gc.net/forums/index.php?showtopic=74725&st=0 old thread and I will be going through their suggestions but if none of them work I will be back here for more help

Thankx again for the suggestion and help!!

[thatSt204guy]

Is the AC button blinking after it shuts off?

yes, it start blinking after it shuts off

[VavAlephVav]

I've got a complete AC info thread here
http://www.6gc.net/forums/index.php?showto...arge+your\

It would be best to actually have some gages to measure the refrigerant pressure before you just let any out. If you were to release some the best way is to open the valve and release it from the high side port in the front of the car. But you need a set of refrigerant gages to do that.
And really imo there are lots of "professional " shops who still don't know how to do the AC right.
Or better still they figured they'd not do it right so you'd have to come back and spend some more money.
I freakn hate dumb****s like that.

[thatSt204guy]

Ok after looking at the thread I would probably just have a shop do it looks pretty complicated and i dont have the tool for it either.

[nics]

Is the AC button blinking after it shuts off?

yes, it start blinking after it shuts off

My guess it would be more related to the AC compressor

[thatSt204guy]

I was looking behind the glove box and i found that this plug is not plugged in. It this the problem that I'm running into. If it is I can't find the plug that is supposed to be there.


(this isn't my picture i just took off the net)

I'm looking for the plug circled in red.

Is the AC button blinking after it shuts off?

yes, it start blinking after it shuts off

My guess it would be more related to the AC compressor

would recommend just buying a new AC compressor?

This post has been edited by thatSt204guy: Mar 20, 2015 - 6:10 PM

[VavAlephVav]

I'd recommend trying to find somebody you can trust to look at it and at least figure out what's wrong with it for sure.
Without actually being there it is hard to really know for sure. I don't think you want to just go out and buy a new compressor just yet.

[nics]

I'd recommend trying to find somebody you can trust to look at it and at least figure out what's wrong with it for sure.
Without actually being there it is hard to really know for sure. I don't think you want to just go out and buy a new compressor just yet.

Yeah don't buy the compressor until the problem is professionally diaganosed. You should take it to a shop and have them look at it first before you decide to buy anything.

[thatSt204guy]

I was taking out the ac compressor and I found this sensor on it, but I don't know what it's for. Does anyone know??



And would anyone know the part number for this?

[thatSt204guy]

do you guys happen to know how much refrigerant our cars should take because I had the system drained today by the same shop that put it in and he said he only pulled out like 1 pound, which sounds like a really low number.

This post has been edited by thatSt204guy: Mar 25, 2015 - 12:15 PM

[VavAlephVav]

http://bgbonline.celicatech.com/94_6gmanua...cifications.pdf

24 oz. - about a pound and a half. That switch on the compressor is probably just the switch that signals the clutch to engage. I think if that was your problem the compressor wouldn't even turn on at all. But I'm not sure exactly what to call it and they don't have it listed on Rockauto so I'd guess you'd have to get one from Toyota.

[thatSt204guy]

http://bgbonline.celicatech.com/94_6gmanua...cifications.pdf

24 oz. - about a pound and a half. That switch on the compressor is probably just the switch that signals the clutch to engage. I think if that was your problem the compressor wouldn't even turn on at all. But I'm not sure exactly what to call it and they don't have it listed on Rockauto so I'd guess you'd have to get one from Toyota.

ok so if the guy only pulled out 1 pound, it could be that he didn't put enough in, in the first place? Would being low by 8 pounds cause the AC to just shut off since its so low on pressure?

[thatSt204guy]

ok so it isn't a low pressure problem because I had the shop put in the roughly 24oz (or so he says) and it still cuts off and the light still blinks after turning off. Also is there a difference in the AC system from the 5sfe and the 3sge Red Top?

This post has been edited by thatSt204guy: Mar 25, 2015 - 5:38 PM

[Bitter]

Is the condenser fan running?

[thatSt204guy]

Is the condenser fan running?

How can I tell.

As of right now cold air does come out from the vents but the system shuts off after like 5 secs and then the light for the AC button blinks.

[Box]

Before the car gets up to temp turning the compressor on will kick on one of the radiator fans, can't remember which one though.

[thatSt204guy]

Before the car gets up to temp turning the compressor on will kick on one of the radiator fans, can't remember which one though.

I went out to check this and when I push the AC button both fans turn on.

[VavAlephVav]

and if the fan doesn't come on the head pressure will get too high and trip the high pressure switch.

If the radiator fan wont come on unplug the wire connector at the very bottom of the radiator to manually bring on the fans and then see if the AC will stay on.

[thatSt204guy]

and if the fan doesn't come on the head pressure will get too high and trip the high pressure switch.

If the radiator fan wont come on unplug the wire connector at the very bottom of the radiator to manually bring on the fans and then see if the AC will stay on.

Just went out and tried this, the AC still turns off after a couple seconds.

[Bitter]

You need a set of gauges to see what system pressures are doing.

[VavAlephVav]

Agreed, you need a set of gages. you could have a blockage in the filter dryer, or in the metering device and you need to be able to read refrigerant pressures to spot that kind of thing.

Does it run for very long at all? If you put your hands on the refrigerant lines running up the fender while it's on Is one of them cold and the other warm?

[Agent21]

I've got the same deal. checked for blockages and nothing. still runs fine with cold air and blinking light. Also sometimes will not cause blinking light. applied 24oz myself to the system The sensor you showed is the speed sensor for the compressor.

[VavAlephVav]

hmmm,
I would have to find a factory service manual to find out what the Blinking light means.
You could try looking it up on BGBonline.celicatech.com

[VavAlephVav]

Oddly enough, mine started doing the same thing a couple of days later.
It would work for a few minutes and then it would go off and the light on the AC switch would be blinking.

But a couple of days later it will stay on the whole ride home. The only difference is that it wasn't very warm the other day when it was acting up and now it's kinda hot out.
I haven't had time to fully investigate it but I have noticed, even when it continues to run the compressor is short cycling. Which to me indicates that it's short on refrigerant However I also realized that it may need a bit of compressor oil.
The oil for the compressor is added to the refrigeration system just like the refrigerant, it circulates through the system with the refrigerant.
For a full charge you need a little 8oz can which you can add yourself with buying just a small hose with the valve and fitting on it.
If you don't have enough compressor oil in the system the compressor may chatter or make other noises and could seize up. maybe if it gets jammed and can't turn that is when the light starts blinking?

I've got two more weeks before finals and then I'll have some more time to look into it.

V.'.A.'.V.'.

[trdproven]

A/C Relay
Belt slipping from oil or rain
A/C Clutch bad
High or Low Ref.