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Old 07-29-2019, 06:21 PM #1
dvto2 dvto2 is offline
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Air conditioning weird...

2005 4runner sport, v6. 255k. The climate control on this has always been fantastic, but the ac is slow to cool down on hot days and only pumps out really cool air out of the passenger vents. Relevant info is that I have slow leak from the coolant somewhere and I have to refill the resovoir every 1000 miles or so. This last time it was maybe a bit more than a resovoir down. What should I be thinking about to resolve this?
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Old 07-29-2019, 06:49 PM #2
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Originally Posted by dvto2 View Post
2005 4runner sport, v6. 255k. The climate control on this has always been fantastic, but the ac is slow to cool down on hot days and only pumps out really cool air out of the passenger vents. Relevant info is that I have slow leak from the coolant somewhere and I have to refill the resovoir every 1000 miles or so. This last time it was maybe a bit more than a resovoir down. What should I be thinking about to resolve this?
You need to have UV dye put into the AC system so a tech can possibly find the leak using an ultraviolet light, most leaks can be easily fixed and the cost will not be real bad but still not cheap.....as long as it's not a leaking evaporator, if it's the evaporator leaking the entire dash and all components, electrical. duct work, reinforcements, etc. behind it has to be remove to gain access to the housing it is in, very labor intensive, VERY, VERY expensive.

I will keep my fingers crossed for you that it's not the evaporator leaking.

Just to give an idea of what it take here's a link where it had to be done on a KIA Sportage which is very much the same as what has to be done on our T4Rs.

How to Replace the AC Evaporator on a 2007 Kia Sportage | AxleAddict

IF it is the evaporator and you choose to get it fix, also replace the heater core while doing the evaporator as they are both within the same housing and you don't want to do the same job later if the heater core starts leaking.

Both the evaporator and the heater core parts run around $60 to $100 each depending on where and what brand you get, OEM will be a lot more well over $200 each.

Rockauto sells a Denso brand evaporator which is as close if not the same as what you would get from Toyota for around $85, they have 4 different heater cores brands but none are the Denso brand.
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Old 07-29-2019, 06:50 PM #3
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I had the same problem and mine is also slow ever spring I have to add about half a can of Freon but it gets me through the summer. So far not worth finding the leak.
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Old 07-30-2019, 07:00 AM #4
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Talking

Quote:
Originally Posted by dvto2 View Post
2005 4runner sport, v6. 255k. The climate control on this has always been fantastic, but the ac is slow to cool down on hot days and only pumps out really cool air out of the passenger vents. Relevant info is that I have slow leak from the coolant somewhere and I have to refill the resovoir every 1000 miles or so. This last time it was maybe a bit more than a resovoir down. What should I be thinking about to resolve this?
I had to replace my AC compressor on my SR% 4runner V6 at 140,000 miles. Got a Denso at Amazon for $190. Been cooling for one year now with no recharges. Use a dye to find the leak.

Compressor's don't last forever.
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Old 07-30-2019, 08:02 PM #5
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So I was wrong in my initial assessment. The passenger middle vent pumps out cold air right away, the passenger door vent less cool and the driver's vents not at all. There is something about how the different vents get cold air that is broken.
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Old 07-30-2019, 08:58 PM #6
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A/C Hot on drivers side!

Ive browsed this thread a bunch and what I have found is that its a defective blend motor.

I have a 2004 V8 Sport without the dual climate control and the driver vents do not blow cold for the first 10 minutes. It kind of sucks. After 10 minutes it blows like ice and if I restart the car within an hour it will blow cold without waiting the 10 minutes.
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Old 07-30-2019, 10:09 PM #7
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Lightbulb First thing........

LOOK at the a/c high side sight glass!!!

Go from there.

Kevin
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Old 07-30-2019, 11:15 PM #8
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Quote:
Originally Posted by Kevin G. View Post
LOOK at the a/c high side sight glass!!!

Go from there.

Kevin
What's the a/c high side sight glass?

Read a lot of the suggested thread. Interesting that adding freon might solve this but I dread the idea of having to replace the evaporator.
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Old 07-31-2019, 04:00 AM #9
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On my 2008 V8 T4R, the a/c sight glass is behind the hood grill, passenger side, in front of condensor.

If cloudy/white foam looking.......low freon. If clear fluid flowing......freon ok.

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Old 07-31-2019, 06:05 PM #10
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So it's a good news bad news situation I guess. Good news is I charged the refrigerant and got cold air out of all the vents. Bad news is the glass looks whiter and foamy after being charged. Not sure what that might mean.
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