IF YOU HAVE BEEN RUNNING THE A/C OR ANY HEAT SETTING WHICH USES "DEFROST", THE COMPRESSOR PUMPS THE FREON (LET'S SAY HALF) PART OF THE SYSTEM TO (LETS SAY 100 PSI)
THE OTHER "HALF" IS UNDER SUCTION AS THE COMPRESSOR IS PULLING THE FREON BACK AROUND TO BE PUMPED UP AGAIN
SORRY, SIMPLE TERMS SEEM TO BE UNDERSTOOD BETTER!
THE REASON THE COMPRESSOR CAN BUILD UP THE 100 PSI IS BECAUSE THERE ARE "ON PURPOSE" RESTRICTIONS IN THE SYSTEM (LIKE AN ORIFICE TUBE, OR AN EXPANSION VALVE) WHICH "DAMS UP" THE FREON FLOW
IT'S DESIGNED LIKE THIS SO THAT LIQUID FREON TURNS TO GAS AND AFTER THE GAS GATHERS THE HEAT FROM THE COCKPIT, IT TURNS BACK TO LIQUID
(A YOU TUBE VIDEO ON "AIR CONDITIONING" (AN ANIMATED ONE MIGHT BE BETTER!) MIGHT SHOW YOU THE WAY IT ALL WORKS
BUT BACK TO THE MEAT AND POTATOES
WHEN YOU SHUT THE A/C / CAR OFF
AGAIN, FOR SIMPLICITY'S SAKE, HALF OF THE SYSTEM IS AT 100 PSI AND THE OTHER HALF IS AT -10 PSI, THE SYSTEM EQUALIZES, TO THE SAME PSI THROUGHOUT.
BEINGS THAT THE "RESTRICTIONS" ARE IN THE SYSTEM, THE FREON "WHISTLES" THROUGH THEM SO THAT IT CAN BE EQUAL PRESSURE IN THE "OFF" A/C SYSTEM
POP THE HOOD NEXT TIME, HAVE SOMEONE SHUT OFF THE CAR, LISTEN AND LOOK TO SEE IF THE NOISE IS GENERATING FROM THE A/C COMPONENTS
LEMME KNOW IF THIS IS THE "CAR MONSTER" YOU ARE EXPERIENCING!
MY "A/C" WHISTLING VARIES AT DIFFERENT SPEEDS AND STOPS EVERY TIME MY JEEP STOPS, SEE PICS BELOW
THE MEDIC
Images (Click to make bigger)
Wednesday, May 27th, 2015 AT 7:28 PM