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With the Tundras having such an odd shaped AC drain hole and in such an odd location is there a method to foam clean the evaporator and box through drain hole?

If not is there a method to plug the drain line, then drill into the evaporator box and foam through that hole? Of course the hole in the evaporator box would need to be plugged after the cleaning.

The reason I ask is because most foam cleaners need to be left to expand and then “work” on the evaporator before flushing so they are usually pumped in from the drain line under the vehicle. The tundra doesn’t seem to be set up to hold the foam long enough for the cleansing action.

(I have tried the Lysol method through the intake at the base of the windshield and through the fan box with the new cabin filter temporarily removed. I have ran just the blower the last few minutes before arriving at my destinations. Never the less Always I still have a slight musty smell at first startup)
 

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Following. I have been jsmming wire up there to try and see if a clog is there. No water came out
I would NOT jam wire up there ,, please use AIR or weed wacker line melted smooth on the ends. The drain tube is likely fragile.
This goes for sunroof drain tubes also , they ARE fragile and i found out the hard way on a dodge. . dont ask.
 
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