Newb Here...quick Question About A/c

[huntnetime]

Figured I might as well jump in whole hog with a question. I have a 2000 Silverado w/ 5.3L V-8. It has been a good truck overall. 160,000+ miles and still going strong. But, my a/c has been acting up a bit lately. Seems like when I accelerate(say going from a steady 45mph and accelarting to a new speed zone for example), my A/C will stop blowing cold air. The blower is still going, but the air gets hot. Sometimes it'll come back on itself and sometimes I have to cut the A/C off completely and then turn it back on a few minutes later. Any ideas? Thanks.

 

Sonny

[bill190]

Check the high/low pressures of the A/C refrigerant per factory specifications.

 

The pressure and amount of refrigerant in the system needs to be just the *right* amount. This is a "balancing act". Too little refrigerant and one pressure sensor would turn off the compressor more frequently. Too much pressure and another pressure sensor will turn off the compressor more frequently.

 

The compressor creates suction on the low pressure side and this suction would increase with higher engine RPM's. If you are low on refrigerant and bordering at the low level which would turn off the low pressure switch, accelerating would cause the pressure to go lower and activate the switch - turning off the compressor.

 

Or if too much pressure and the pressure is bordering on activating the high pressure switch, then accelerating would cause an increase in pressure on the high pressure side and activate the high pressure switch - turning off the compressor.

 

So needs to be just the right amount of refrigerant/pressure in the system.

[huntnetime]

Check the high/low pressures of the A/C refrigerant per factory specifications.

 

The pressure and amount of refrigerant in the system needs to be just the *right* amount. This is a "balancing act". Too little refrigerant and one pressure sensor would turn off the compressor more frequently. Too much pressure and another pressure sensor will turn off the compressor more frequently.

 

The compressor creates suction on the low pressure side and this suction would increase with higher engine RPM's. If you are low on refrigerant and bordering at the low level which would turn off the low pressure switch, accelerating would cause the pressure to go lower and activate the switch - turning off the compressor.

 

Or if too much pressure and the pressure is bordering on activating the high pressure switch, then accelerating would cause an increase in pressure on the high pressure side and activate the high pressure switch - turning off the compressor.

 

So needs to be just the right amount of refrigerant/pressure in the system.

 

Thank you for the info...I'll be sure to have it checked out.