Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello, you have a blocked AC drain, Its a small tube that exits the firewall down low to drain off condensation, Over time road debris, bugs etc block it. To fix?best you drop by a local shop, they put on lift, used compressed air and blow the debris out in like 5 minutes. DIY? you can but have to have compressed air, you can NOT poke anything in the tube or can damage evap core then big job. also, hard to describe location. Its down low on firewall, need to locate the rubber drain tune from underneath. Yes.. 100% the buildup of condensation in the HVAC case will affect airflow, cause noises and so on, generally does no further harm till you can get the drain blown out. In our shop? if a regular customer? we dont even charge for this. if you have to pay? it really only takes 10-15 minutes totoal and all shops know what to do
factory information does not show this, I have all that info , I had checked, Its on the firewall, down belwo where AC lines and heater hoses go into the firewall, so,, you have to get under and locate a small drain hose/nipple, very similar to these pictures. If the GM manual offered. I really would send so I have to try and describe. I am sorry, hard not being there, doing my best. here are the links to the pictures
99% of the time, the drain hose is near directly down/below the AC lines where they enter the firewall indicating the location of the Evaporator behind the dash
yes, that is the correct way, A 911 way is one of those long tie straps, plastic ones. You can insert them fairly safely and not damage the evaporator core as they are soft. That is the only thing other than air you can put into the drain hose.
Sry for the delay, I am not following t he question,.Are you having ac problems or water running inside on t he floor, I was helping with the water on floor boards and ONLy way for that to happen is a blocked evap drain
yes, possible and likely, When there is a backup of condensation in the HVAC case and not draining properly, it can affect the blower. It can rust bearings , affect the blower brushes and so on and will cause a diminished blower or airflow operation. You said originally water, then blower noisey then less airflow so, not being there and going on symptoms? the blower may have been compromised with excessive water in the HVAC case
.if air speed is dropping on/off , goes back to possible blower damage from water now or in the past, the only way water on inside foor, clear water would have been evap drain, I still feel one prob caused the other, just hard not being there, I cab only send suggests, You may need a blower