When does the condenser fan come in with the AC on?
The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold.
What does a PSI reading on an A / C compressor mean?
Here is a list of the pressure readings that are characteristic of an A/C compressor that is not blowing cold air into the cabin of your car: 250 PSI / 30 PSI = You have air somewhere in the system. 250 PSI / 50 PSI = The system is overcharged and the condenser is not cooling. Condenser may be blocked.
How does the AC capacitor work in a compressor?
These two components play a critical role in providing the compressor with the power it needs to operate. The AC capacitor provides power to the compressor, outer fan, and the blower motor. The starter relay transmits the power to the compressor from the capacitors.
What does 250 psi tell me about my a / C system?
250 PSI / 50 PSI = The system is overcharged and the condenser is not cooling. Condenser may be blocked. 225 PSI / 80 PSI = It is likely that the expansion valve is opened too wide (not the case if your A/C system has an orifice tube) Also, you could have too much refrigerant in the system.
When does the a / C AMP kill the evaporator?
If the Evaporator core (cab) drops below 34 °F. ( because of Expansion valve error) the A/C AMP kills the A/C until core thaws. 37°F is the return back to normal point. If the ignition switch signals CRANKING falsely (cranking via start motor) this kills the A/C function.
Why is my AC fan running when I Turn on the AC?
When turning on the AC, you may notice the fan running when the compressor is not. In most cases, the problem is usually simple enough for a DIY quick fix, but there are instances when an HVAC technician may be required.
When does the front condensor fan shut down?
THAT IS ITS NUMBER 1 JOB. The front fan runs any time the A/C is turned on, if the out door temperature outside is below 50ºF the Front Condensor fan may? shut down on some years and marketed cars. #23 is Condensor, #29 is receiver dryer with HI/LO switch on top., compressor is #1 and evaporator is #37 which contains the expansion valve too.
What does it mean when your AC compressor is not working?
If your AC compressor is not functioning, here are some situations you may face: Warm, dry air coming from the running fan. The circuit breaker keeps tripping. The compressor stops altogether. Strange noises and shaking from the outdoor unit.