yes AC compressor is running and blowing cold but running all the time with no intermittent OFF/ON switching, in MY LC100 I can see how pulley start and stops , but in LX450 it is spinning all the timeOn call for AC the compressor clutch engages the pulley yes. On NA trucks the AC button turns it on. On JDM trucks the temperature control module does it. AFAIK...
Yes that is it, it is constantly working and overheating radiator
o we know it is A/C doing so is is heating A/C radiator to sizzling temperaturehello Peter ,
- a constantly running or engaged compressor clutch in the ON mode 100% of the time should not be the sole or only cause of your overheating issues ?
- in fact it should NOT even ever cause a engine high TEMP. gauge spike at all ?
- the Engines thermostat will sense and detect a ever hotter becoming coolant and continue to mechanically OPEN up more and more as needed to allow more coolant
flow throughout your cooling system .........
- i would suggest looking outside the TEq Box here maybe , confirm and verify both your coolant temp sender / sensor , and also more importantly , your Coolang guage in the cluster meter per the FSM step by steps stand alone bench tests .....
- thermostat replacement i am sure you have done by now if you know my SOLID MUD Buddy Peter the Great ........
o we know it is A/C doing so is is heating A/C radiator to sizzling temperature
To clarify, the compressor engages when the A/C switch is turned on and does not cycle on/off during operation. Only cycles off when the A/C switch is turned off?
Bingo! Don't blame the compressor for the overheating issue, it could be a different problem.What's the ambient temperature when this is happening?
The first thing you should do is get AC gauges on there and see what your high and low side pressures are. See what they are at idle, and at 1500 RPM. Warm the engine up before checking the pressures.
(Edit: temperatures ==> pressures, stupid brain)