Hello everybody

I have this problem but I don't why it occurs in my GMC jimmy 00, when I park it in sun or weather very warm and switch on A/C the clutch continue engage and disengage the compressor is new just replaced before 1 year with all o-rings and drier accumulator also, I install dual fans on a/c condenser and there are already dual fans on radiator . I check the pressure of low side with my pressure gauge and its 44 psi when the climate temp is 42 C (106 F) above 20% humidity in the least recommend service manual pressure.


Thank you

 

How are you testing the low side pressure if the compressor clutch is turning on and off? How fast does it cycle? What is the center vent temperature with the fan on high? Is the accumulator cold and sweaty?

George

 

No, when I check it in morning around 6:00 am and it never cycle on off . This happen only when the weather hot, Its very cold like ice and yes accumulator cold and sweaty.

 

How fast does it cycle on and off?

What are the high and low side pressure peaks and valleys during the cycling?

What are the pressures today when it does not cycle?

George

 

- It cycle on off in 15 sec continuously for 5 minute while I drive then it work fine. Also, I forget to tell that I solder wire from the dual fan to the a/c clutch connector and when I set the blower on 4 the voltage drop to 10 and the car run rough.


- I don't know what you mean


-I don't check it today


thank you GeorgeLG