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Re: My temp gauge that reads the degree outside reads 49...
The ambient temperature sensor needs to be replaced these are usually located in front of the radiator when you open the hood.These are typically not too expensive,
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The low side reading will usually correspond with the dash temp,45 lbs at low side should equal 45 degrees f at the dash with a medium fan speed and 70 to 80 degrees f outside temp with a good air flow through the condenser.(fan placed in front of vehicle).
It is related to the outside temp and the cold temp of the oil. Cold engines with cold oil will read a higher pressure. The pressure should go down to normal when operating temp is reached.
Had the same problem, replaced the ambient air temp sensor in front of the radiator. Cost is like 10-15 bucks. Don't worry if temp doesn't change right away. Took me about 5 miles and then it worked great.
you need to go to the parts house and purchase an ambient temperature sensor. that is the sensor that tells the car what the outside temp. is. I hope that helps you out.
This probably occurs when you start up after the engine has been off for a few hours. What is happening is that the module is taking a new temp reading however heat from the radiator is causing the sensor to read a warmer value than it really is. I suggest that you relocate the temp sensor further away from the radiator and closer to the grill opening in order to read actual ambient temp (approx 6" should work).
the sensor is in behind the nosecone. but this should not effect the ac system . it would it the inside temp sender said that in the auto mode only. put it in defrost mode and the compressor should be on if not you have another problem (maybe low on freon)
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