Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
hello I wil assist your with this . do you have access to a scanner ?
what do you have for DTC's ?
when the light is blinking if your raise the hood do you see that the compressor is NOT engaged ?
have you had the refrigerant charge level checked ? If the compressor is engaged and running at idle , you need to see about 15 to 30 PSI on the low side and 175 to 250 PSI on the High side gauges . The blinking light normally indicates a Low refrigerant charge due to a leak in the A/C system .
at an idle with the compressor engaged , is the Large Aluminum pipe at the passenger side firewall " Cpld " and wet ? ( sweating )
the flashing light is telling you that you have DTC's you need to scan the HVAC to see what the code ( codes ) are .
It is very likely , do you have rear A/C ?
but I strongly suggest that you scan the HVAC . A good quality scan tool will tell you that you have a low charge problem . O common eak area is the lines going to the rear A/C Evaporator unit as they run under the vehicle and are aluminum and are exposed to the road spray / salt if you live in an area with a cold winter climate , etc .
you can also do a quick check by doing as I suggested . See if the large aluminum A/C pipe at the firewall ( passenger side ) is " COLD " . It should be very cold to touch and wet, sweating .
okay LOL . so no worries about cold winters and road salt . you most likely are low on refrigerant . you need to do some of these checks in order to get headed in the right direction to find the fault . Can you do any of the things I have suggested ?
you can also have an intermitant electrical fault with the A/C pressure switch . YOU really need to scan the HVAC system . there WILL be diagnostic trouble codes stored .
a scan tool connects to the datalink connector ( DLC ) and should give you the option of what module to scan , eg , ECM ( engine ) BCM ( Body ) ABS ( braking ) , etc . The menu will include the HVAC module . If your scanner does not give you the option for HVAC then you will need to find a scanner that is a more professional grade that has that functionality .
how are you progressing with this sir ?