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Suspect a failure in the ambient air temp sensor. Has the vehicle ever been in a frontal collision? This sensor is normally located in front of the radiator assembly bolted to the rad support. If it is reading a cold temperature, it will not allow the AC to operate
temp sensor failed. could be the air intake sensor... or the ecu temp sensor falling... easy to find out if intake sensor failing. before starting on a cold morning. or under 10 degrees.. unhook the air pipe and blow with your breath over the sensor put back and start engine. if engine starts fine then that's your problem.
The car is obviously itself running at an above average tempareture thus adding to the effect of the outside tempareture having an influence because their is not enough cool air outside to cool down the engine fast enough and probably one or two electronic components are being affected by the intense heat as heat is a major problem in all electronic components causing them to break down, especially within a hot engine compartment of a motor vehicle.Contraction and expansion is what causes the fluctuation within the component's performance.This could very likely be an erratic electronic contact, and in the event of a carburettor model could also be a hot mechanical fuel pump. Try pouring water at a slow rate over the various components like the electronic module, some of the sensors on the engine, Hold a cool wet rag over the airflow meter, and place a cool wet rag around the distributor, the coil, etc.Sometimes even a hot relay switch can be a headache.As you go along try starting the car again after each cooling session on the various components and you will eventually find out which one is the problem. Good luck.
Well the outside temperature gauge is generally not wired into the a/c. The internal temperature is more important but is not displayed as such. The 'internal' temperature sensor is used to regulate the a/c blending door and blower speed.
Entirely possible and in range. Depends on outside temps and type of driving. The radiator is colled by electric cooling fans, controlled by temp sensors. Fans should come on automatically when a/c is turned on
The ambient temperature sensor going bad causes this exact problem. I've replaced many of them because when they show outside temp as being below 60 degrees, the A/C control module will shut the compressor off.