100 series air con drop out

go and see a good Air Con repairer as this should not happen and don't rely on Toyota Service there good but don't look out side the circle. Good Luck

Where abouts is Hedland?

Skinnydog

Had the same experience when travelling to Kununurra, towing van in 45 degree
heat a couple of years back in a 75 series with 1HZ and original Tojo aircon. I found that a decrease in forward momentum reduced engine temp and a/c came back on line. Thankfully.
Had some a/c repairs done sometime after that and enquired about the same thing as you, bypass thermal cut out. I was told at the time by the alledgedly competent air con man that it couldn't be done. Having since found that competent isn't a part of the alledged air con mans vocabulary I would also be interested if there was an alternative. Good luck.

Cheers WAL

Shouldnt be able to lose oil as it travels with the gas through the system,
most AC have a low pressure cutout which prevents operation when refrigerant drops and hence oil is lost, some also have a high pressure cutout which will activate when it undercondenses such as with very hot conditions or blocked fins(all commercial refrigeration has them) This prevents the compressor cooking or the system releasing all the refrigerant. One thing that could cause this problem is if the system is overcharged with gas. Check that the condensor fins are clear and in good condition first though.
BUT disconnecting the thermal cutouts is like taking the bulb out of your oil lite or turning the stereo up when the V-belts start squeeling.
Of course this assumes that there isnt a fault with the cutout (and I bet there isnt, its doing what its supposed to)

Incidentally, if you lose gas from any system look for the oil stain as that will be where the leak is (or was!!)

Nissan Patrol Gu does the same on a scorcher.
The cut out not only saves the air con from damage but also helps stop the donk from cookin.
Just back off a bit and it should cool down or turn off the air for a bit.
I have the same trouble when towing the van on a scorche, my solution find a swimming hole and veg out.r

Hi Skinnydog,

We have had many 80 & 100 series cruisers in our fleet, with the same problem in extreme heat. There are two cures that I know of that work. We take them back to Toyota and get them to release a bit of pressure and that helps, but I have found that the problem also lies in the under-bonnet temps, so driving around with the bonnet up on it's catch is a sure cure, although you would want to keep the vehicle speed at a steady pace so as not to loose a bonnet.

Chaz

unplug the temperture sender to the air con. fixes the problem straight away

The surf's aircon cut's out when the engine temp is getting too high. Even if the guage has not moved that much it's obviously an ambiant air sensor or similar. Backing off thr throtle would porbally help. Also I find once it's cut out you have to drop the engine temp back quite a way before it will cut back in, other way around it is to turn the air con off for a couple of mins after you have backed off then switch back on, that must do some kind of reset.
The other thing to do may be to get a good engine radiator flush and new Yoto LLC coolant put it, check the viscous clutch fan. Maybe that the beast is not handling the heat that well to start with.

I may be way off track, but that's how the surf works and I can only imagine the other Yotas are similar.

I had the same proble the other week driving from Hedland to Woodie Woodie (2 hours east of Marble Bar) in a hire 100 series found by dropping from 130 to 110 seemed to help

I know I'm a bit late in a reply (just got back from holiday) but as Davoe said earlier if its a 1HZ motor they have a high water temp cutout switch on the A/C. This sensor will turn the A/C off if the water temp gets above a set point (to stop putting more thermal load on radiator). The sensor is on the RHS of the engine at the top front. It is a plastic plug with 2 wires coming out of it (it is in line with your radiator hose).
Those two wires on my cruiser had corroded to the stage that the A/C cut in and out randomly and it took me AGES to figure out why the A/C would stop and start. Simple fix was to short the 2 wires together. This wasn't ideal but got my A/C running.
There will be an explaination of it if you read the Gregory's Manual. I only found this problem by mistake, saw the corroded wires and then looked into the book to see what the part did and then bingo - thats why my A/C wasn't working.

Hope this helps.

Cheers,
Hughesy