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09-08-2010, 12:53 PM | #1 |
Banned
Drives: '10 Yaris5drHB+99 4runner LTD Join Date: Sep 2009
Location: NE
Posts: 672
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HVAC evaporator drain blockage...NOT
OK,
2010 Yaris 5 door US ---- rainy day, AC blasting, 90 miles drive got home, noticed my weathertech mat had water on it ---- pulled out mat, pulled down carpet, pulled on evap hose, clean water flowed out. there is zero blockage and I always have used a filter. I do NOT have particles or any debris blocking the drain. water is extra clean. ---- What I suspect and what I did: I think the rubber hose is too flimsy and unprotected, and it must have had a kink in it OR A) the AC is far too efficient and it produces way too much water on a rainy day B) highway breeze pushing up against the tube exit drives the water back and it cannot drain normally through the firewall ---- anyhow, what I did do was: obtained a length of clear plastic tubing the same internal diameter as the plastic nipple on the evap tank where the black hose attaches to the tank shoved that hose up inside the black rubber tube as a sort of liner. Now it is impossible to kink the flimsy rubber tube through the firewall, and I lost no volume because the inside diameter is the same as the plastic nipple the clear tube extends into my firewall an inch further than the black hose. I will just have to see if this changes anything. i have to wait for a humid rainy day where I am driving 90 miles with AC blasting.... anyhow...the TSB defect is not always debris in the evap tank, or anything to do with the cowl debris screen size....there is some other design defect here......... unless this is the AC amplifier logic change....I can only guess they make it less efficient overall, or during humid conditions to reduce the overall water production Last edited by 127.0.0.1; 09-08-2010 at 01:17 PM. |
09-08-2010, 02:25 PM | #2 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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The airbox is not insulated, so when the AC is cranking condensation can form and drip off of the outside of it.
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09-08-2010, 03:43 PM | #3 |
Banned
Drives: '10 Yaris5drHB+99 4runner LTD Join Date: Sep 2009
Location: NE
Posts: 672
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hmmmmmmmmm...
as long as my vents and carpet don't smell like a hobo next rainstorm and 99% humidity and 80 deg, and a need to drive 1.5 hours... I will test. that may never happen again though |
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