How To Clean A Clogged Ac Evaporator Without Removing Dash

• #4

LOL, running the oestrus won't do anything... the heater core is Later on the evaporator core.

We use a BG system here, that has you drill a small hole in the example ahead of the evap core, and spray this stuff in there. Y'all tap the hole with a piddling plumbing equipment, and connect the tin directly to that. Then you lot accept a cap for the plumbing equipment if yous want to leave it in there for next time, or they provide a plug you can use to embrace the hole.

This is a tricky procedure on some cars though, as you do not want to drill in such a way as to hitting the core inside. It also works best if you can temporarily cap off the condensate bleed, thus "filling" the crenel in which the evap core sits with cleaner, and let it soak.

I have had mixed results using this. It is probably a better prophylactic measure than a fix for anything. But if done correctly, it really cannot hurt anything.

On these cars, the foam coming loose is of a bigger concern than gunk buildup on the evap core. If your HVAC system is working to your satisfaction, I'd probably not worry almost it.

• #vi

I've already fixed the alloy doors.....

Fixed them how?

• #8

OK, so yous didn't practise anything with the recirc door, and when its foam comes loose, it goes into the evap core and starts to clog it up (in addition to non completely sealing off the outside air so that it actually DOES recirculate properly).

Still, this goes back to the original post, and your statement/my question of verification: are you actually having an consequence with airflow and/or cooling capacity or are yous just asking because you saw a tardily night infomercial?

If the organization is cooling to your satisfaction, even though it may not be at 100% as new efficiency, I'm not sure information technology is worth the endeavor to try and go afterward a less-than-perfect evap cadre.

I mean, my Golf can give me an ice foam headache on a 100 F day, so even if it had a 10% striking in cooling capacity, information technology'll withal get y'all enough comfortable.

• #x

Well it is always subjective, if you retrieve when information technology was new its cooling was marginal then y'all wouldn't similar a lot of other cars. Just I agree the actress volume does not assistance, I know this from my Passats... sedans for sure cool better than the wagons... but they practice not cool as apace as the Yard/J/NB to begin with. They use an orifice tube organization, which is what the bigger Audis and the Phaeton utilise, and so yous'd *think* they'd exist better, but they are not. That said, they still keep the cabin comfortable. It is merely a question of how far off full cold ane has to turn the knob to keep from getting TOO cold.

• #12

I thing VAG does Not do on all their newer (like, 1980s+) cars save for some of the bigger fancier models is limit or block hot coolant catamenia through the heater core. Most other manufacturers have some ability to practice this if the temp is put to full cold. These means that the radiant estrus Within the HVAC example seeps out everywhere in the nuance, and even though the air from the blower is not specifically routed by the hot heater core, the whole box and surrounding area gets hot. So that is but a few more BTUs the A/C has to deal with.

Problem is, you cannot just retrofit a valve on to the system, as the heater core circuit HAS to menstruum coolant through it for proper engine cooling system role. Then you lot'd need an "H" valve, where the coolant is bypassed then information technology is not flowing through the core, but the circuit itself is even so moving coolant.

I take really though about this for the B5 Passats, equally there is room in the cowl next to the battery I recall to install ane of these, like from a ~2004ish Ford Explorer for instance. It is vacuum controlled, so I'd need to tap into the vacuum source line, then run a solenoid to switch it, controlled by a switch within the machine. I even thought about mounting a microswitch on the side of the HVAC instance where the temp alloy door is, so that when you moved it to full cold, it would close the switch, trigger the solenoid, then allow the vacuum to put the valve in featherbed mode.

The Ax cars would be a flake harder due to available room, but I am sure information technology could be rigged upwardly somehow.

Toyota, Nissan, Honda, some GM, Hyundai, all use this type of heater core bypass valve. Volkswagen does not.

Source: https://forums.tdiclub.com/index.php?threads%2Fa-c-evaporator-cleaning.500290%2F

Posted by: baileysoublartand.blogspot.com

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