AC Drain Issue?
Thread Starter
Intermediate
Joined: Dec 2017
Posts: 42
Likes: 7
From: NorCal
AC Drain Issue?
I changed the oil on my 2017 Stingray today and noticed a 2"-3" diameter puddle of water on the floor. I believe it was under where the AC drain tube would be (pass side near firewall). I use a floor jack to put the front on 14" high Race Ramps Wheel Cribs and than level the rear of the Corvette, before draining the oil. This was the first time I've jacked the rear up first so maybe that's why this was the only time I noticed the water. I haven't driven the car in over 10 days. I always drive my car to warm it up before changing the oil and have used the AC before but this is the first time seeing a water puddle. I do have a interior musty odor at times after I use my AC. I'm thinking the drain hose is not plugged or it would not have drained? I live in NorCal where it's not very humid and never see a puddle on the garage floor after using the AC. Has anyone else experienced this problem?
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I would say that you are right, the water is from the AC drain hose. If it was plugged, water would not come out. I would be concerned if there is a musty smell - you may need to get that looked at.
Could be that the change in how you jacked the car made a difference.
Could be that the change in how you jacked the car made a difference.
Burning Brakes
Joined: Apr 2023
Posts: 876
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From: Massachusetts, North Shore
We see clogged A/C drain hoses all the time at my dealership. Spiders get inside them and build nests in the hose.
Lexus/Toyota has an insecticide tip that goes in the end of the hose to prevent this. When the hoses get clogged this
way the condensation backs up into the HVAC and causes the musty odor.
Lexus/Toyota has an insecticide tip that goes in the end of the hose to prevent this. When the hoses get clogged this
way the condensation backs up into the HVAC and causes the musty odor.
Team Owner
Joined: Sep 2000
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
^^^^^
The drain line can indeed be a problem.
You can also get a musty odor even if the drain isn't plugged, ask me how I know.
Have your tech enable the "Afterblow" feature. Sounds pornographic but just causes the A/C blower to run a little a few minutes after shutdown. Worked for me and others.
The drain line can indeed be a problem.
You can also get a musty odor even if the drain isn't plugged, ask me how I know.
Have your tech enable the "Afterblow" feature. Sounds pornographic but just causes the A/C blower to run a little a few minutes after shutdown. Worked for me and others.
Burning Brakes
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Burning Brakes
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Thread Starter
Intermediate
Joined: Dec 2017
Posts: 42
Likes: 7
From: NorCal
We see clogged A/C drain hoses all the time at my dealership. Spiders get inside them and build nests in the hose.
Lexus/Toyota has an insecticide tip that goes in the end of the hose to prevent this. When the hoses get clogged this
way the condensation backs up into the HVAC and causes the musty odor.
Lexus/Toyota has an insecticide tip that goes in the end of the hose to prevent this. When the hoses get clogged this
way the condensation backs up into the HVAC and causes the musty odor.
Team Owner
Joined: Sep 2000
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
Thanks for the parts picture!
My guess:
Afterblow is not factory-enabled because not needed in some areas; puts an additional load on the battery, and would confuse owners who wonder why that fan starts running long after the engine shut down.
My guess:
Afterblow is not factory-enabled because not needed in some areas; puts an additional load on the battery, and would confuse owners who wonder why that fan starts running long after the engine shut down.
Thread Starter
Intermediate
Joined: Dec 2017
Posts: 42
Likes: 7
From: NorCal
Gearhead Jim - I agree with your reasoning as that makes perfect sense! Now, do I pay the dealership or do I buy a "bi-directional" scanner as (I only have a Actron CP9589 scanner which I believe only reads codes and turns them off). Can anyone recommend a good bi-dir. scanner that will work for this purpose or will any of them perform this function?
Team Owner
Joined: Sep 2000
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
^^^^^
Whenever I have something minor that could get expensive because of minimum labor times, I try to combine it with something else.
With a friendly dealer and friendly Tech, it often gets done for little or no extra charge.
IIRC, when I decided I wanted Afterblow to be enabled, I asked for it at the same time as getting an oil change.
The Tech told me it had been done, it is working properly now, but somehow never made it into the billing.
Whenever I have something minor that could get expensive because of minimum labor times, I try to combine it with something else.
With a friendly dealer and friendly Tech, it often gets done for little or no extra charge.
IIRC, when I decided I wanted Afterblow to be enabled, I asked for it at the same time as getting an oil change.
The Tech told me it had been done, it is working properly now, but somehow never made it into the billing.
