2001 Nissan Maxima AC CLUTCH will not engage in hot temps

I COULD NOT GET ANYONE TO CHECK THE SYSTEM, DURING THE SHUT DOWN. DURING THE SHUT DOWN I ACCIDENTALY BLED ABOUT FIVE SECONDS OF FREON AND OIL FROM THE SYSTEM WHEN I USED THE WALMART GUAGE. THE FELLOW AT AMCO AC REPAIR SAID THAT MORE THAN LIKELY THE FREON WAS TO HIGH AND THAT'S THE WAY THE SYSTEM ACTS WHEN IT IS TO HIGH. HE WAS TO BUSY TO CHECK MY SYSTEM. THE SYSTEM RAN OK IN 100 DEGREE WEATHER TODAY. I GOT A FREE CHECK UP AT MEINICKE MUFFLER AC DEPT AND THE GUGE READING WERE VERY GOOD AND MY COLD AIR READING AT THE VENT WAS 48 DEGREES. SO I GUESS I ACCIDENTALY FIXED THE PROBLEM. SOME DUMB LUCK HUH TELLL EVERYONE OUT THERE THAT YOU SHOULD NEVER PUT FREON IN THE SYSTEM UNTIL YOU CHECK THE READINGS WITH THE PROPER GAUGES. I FOR ONE AM GOING TO BUY A SET OF GUAGES, BECAUSE I AMTOLD EVEN NEW CARS LEAK 134 FREON

I FORGOT ABOUT IT WHEN I DID TOP OFF LAST YEAR--MY SON REMINDED ME O WELL

HI HERE WE GO AGAIN. FEB I HAD THE LEFT REAR SENSOR REPLACED FOR $300.00. NOW THE ABS LIGHT IS ON AGAIN. I TOOK IT TO A REPAIR SHOP AND THEY SAID THE FRONT RIGHT SENSOR IS BAD--BUT HE WOULD NOT REPLACE IT IF I DID NOT REPLACE THE PICK UP DISK. THAT ADDS UP TO $900.00. SHOULD I REPLACE THE SENSOR ONLY AND HOPE THE LIGHT GOES OUT