what is a ac relay on a car ac relay switch turns the ac fan on and off depending on the temp of the freon too cold it turns off too warm it turns on depends on the preset temp
sounds like your outside temp sensor is internally open, you will have to replace the sensor, its location depends on the model and year of your car, also the ac works in with the outside temp, if your sensor is faulty then the ac will not function properly,
Had the same problem with 2001 Explorer Sport 4.0 SOHC. Thermostat was the problem. Engine was overheateing causeing rough shifting and warm air out of AC. $15.00 Fix!!!
It is important to know the signs of a bad car part. If an AC clutch bearing going bad, the biggest indication would be the trouble driving with the AC on in the car.
I would suspect a thermostat stuck open.
Connect a freon gauge and can to the low side AC port. Start the car and turn the AC on high. Open the freon valve and fill the system to full on the gauge reading.
The recommended way to charge your vehicles ac system is to use a pressure gauge. If you go to www.idqusa.com you will find a chart that will tell you how to use the ambient temp and the correct low side gauge reading that you need in your vehicle to get the best results from your ac system.
Connect a freon tank and gauge to the Buick Century low side ac port. Start the car and turn the ac to high. Open the tank and allow freon to flow. Shut the tank off when the gauge reads full.
Connect a gauge and freon can to the low side port of the ac system. Start the car and turn ac on high. Fill freon till the gauge shows full.
I was having the same problem with my 99 explorer. What I discovered was that the overflow tank for the radiator was empty and was causing a false reading by the temp gauge.
Freon in the AC system heats up very hot before it is sent through the condenser. The condenser is like a radiator, and is located right in front of the radiator of your car. As air passes through the condenser & the radiator , the hotter the condenser, the hotter the radiator will be. correct answer the temp goes up when using a/c as the motor is running at a higher speed to drive th a/c , therefore when idling the fan is not pulling anuff air over engine. a thrmatic fan will help with this
In very hot climates with the AC on while the car is moving slow or idling, the temperature gauge of a 1998 Pontiac Grand Am should ideally stay in the middle of the gauge or slightly above, indicating that the cooling system is effectively regulating the engine temperature. If the gauge goes into the red zone, it may indicate a cooling system issue that should be addressed promptly.