So I just bought this 97LX450 with 33,000 miles on it. First let me just say that I am absolutely in love with this truck. My only problem is that with my foot buried in it for any length of time the Air conditioning will stop blowing cold air. After shutting off the AC for a couple of minutes it will start blowing cold again. I thought it might be the belts slipping so I changed them (which they needed a few thousand miles ago) but it still happens. I have spent numerous hours searching for this on this board (I work nights with few things to do most of the time) but I haven't found anything that looks like it may be related. Any suggestions on what it might be?
AC shuts off on hills (tried search already)
- Thread starter tucsonlx
- Start date
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overheat switch in the block, look into your cooling system, coolant change and fan clutch test is a good place to start
the temp gage is not very sensitive you can overheat without it moving much AC cut out is your first indication of overheat
the temp gage is not very sensitive you can overheat without it moving much AC cut out is your first indication of overheat
Tucsonlx, from your name it sounds like you're from Arizona? I've experienced the same thing in my '97 Land Cruiser. Once while going up the hill at Black Canyon City on I-17 in the summer, I noticed that the temp gauge had gone up a couple of notches and that the A/C had cut out. Once at the top of the hill, the cold air came back. Now I try to turn off the A/C for the short time it takes to make it up the hill. Other than that, the A/C seems to work fine.
>> ... with my foot buried in it for any length of time the Air conditioning
>> will stop blowing cold air.
I believe this is as designed. When you back off of WOT the A/C will come back on.
33K ??? Nice score!
-B-
>> will stop blowing cold air.
I believe this is as designed. When you back off of WOT the A/C will come back on.
33K ??? Nice score!
-B-
- Thread starter
- #6
Wow, 4 responses in 25 minutes. Thanks for the info. The temp guage never budges during the hills but I guess the guage could be a little too buffered. I just bought some toyota red and plan to do a good flush in the next couple of weeks when I get the time. Hopefully that will help.
Aaron
Aaron
get soem distilled water also, $.58/gal at wally world, there is a good write up on overkill flushing in the FAQ
According to Toyota, the AC should automatically shut off if the coolant gets to 226 degrees F or above. This has happened to me only once, and that was on a steep mountain road, heavily loaded truck, full throttle, with an outside temp of 120 degrees.
A thorough checkout of your cooling system would be in order.
A thorough checkout of your cooling system would be in order.
My truck has only shut off the ac once while climbing out of death valley. I tow a 3500 lb trailer through the white mountains during the summer and never have had it shut down.
This exact problem happened on my '95... especially in traffic. Did the flush and put in Toyota Red, Distilled water and installed a OEM fan clutch and belts and it went away.
Medtro was right.
check the level of your r134,
Dave
check the level of your r134,
Dave
Rich is spot on. The AC system has it own coolant sensor (1 of 3) when the coolant reaches 224 -229 degrees (range of tested coolant sensor previous thread) it kicks the compressor off until the coolant cools down. More then likely you are not able to see the difference between normal running temp and 226 on the factory gauge.
If you are low on freon and it is warm out you will notice it cycling in a short period of time before things have a chance to heat up.
HTH
Phil in Sunny Arizona
If you are low on freon and it is warm out you will notice it cycling in a short period of time before things have a chance to heat up.
HTH
Phil in Sunny Arizona
