A/C evaporator access?

The truck is 6 years old and Toyota A/C Power Foam kit is 3 or 4 years old already. I still haven't figured it out how to foam the evaporator... Do it on my old Swede 2-3 times a year with little to no effort, via evaporator temperature sensor. Contrary, for Tundra there's very little info to be found on the Net. A few drain tube access pics I'm able to find belong to a colonoscopy procedure manual. I definitely would not able to sneak Toyota's foamer hose over there. The next best thing I can find, it requires drilling a hole in the evaporator/heater core box???

Toyota, really? No A/C afterblow function (dries evaporator in 15-45 minutes after shutting the engine off), no easy access to evaporator either. I wouldn't last million miles with that musty smell.

 

Did you ever find a solution? I’ve found nothing searching online!

 

Driving into my neighborhood, I always turn off the ac, open the fresh air intake, and blast the fan to clear out any water on the evaporator coils. I then crack the window open when parked overnight in the garage.

 

Has anyone else given the cowl vents a shot of Lysol spray? I do my vehicles and the RV AC unit.

 

Never had an issue with a musty smell in any vehicle I’ve owned as long as the ac drains and cabin filters are clean.

 

Well, I’ve now discovered the Toyota Power Foam cleaning treatment that goes up through AC drain line, perfect simple solution.

Ordered mine yesterday.

 

Good luck, I've tried that kit twice. Works for about a week and it's back.

 

What is hopefully in my favor is that mine doesn’t have any odor, I view it as a preventative maintenance item.

But yeah it won’t solve your problem if the evaporator is really bad. There are stronger chemicals that will help more, but I’ve always sprayed them onto the evap and hosed them off after, which is what I was anticipating doing here.

I just couldn’t find info on how to access the coil.

But given that mine doesn’t smell, and I can get the kit wholesale for $24 from the dealer, I’m hopeful that doing it before spring and again in late fall will keep it cleaned out.

If anyone ever has info on how to directly spray and hose the coil, I certainly hope they post it here…

 

The kit is meant to sprain in the drain, which is in the worst place above the transmission. You have to contort your hand and the nozzle isn’t sized well to really fit on the drain, so half ends up dripping on you.

 

Well that’s a hell of a shit sandwich. Now I’m back to wondering if there’s an access point near the blower motor, under the dash that would be more effective.