Heater core/condenser debris clean out

[TacoJuan]

I purchased a 2016 4Runner last year, only had 20k miles on it. Previous owner must have lived in a pine tree. There were pine needles EVERYWHERE. Just the other day I remembered I never checked or changed the cabin air filter, so I did and it was CAKED with pine needles and other debris. I’ve always thought the 4Runner left a lot to be desired in the way of cooling, heating and the blower power itself, now I’m wondering if the heater core isn’t caked up with more pine needles. Is there an access port to it that I can vacuum out the box easily or would the dash have to come all apart. Thanks for any help in advance!


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[Tbasse01]

Well my 2016 blows so much heat it is stupid windows down in a snow storm

 

[curmudge1]

Doesn't the cabin air filter keep stuff from getting to the heater core? Asking seriously, not trolling the OP.

 

[1000MPH]

There’s a small access port on the driver’s side where you can insert a tube for foaming evap core cleaner. This is usually for stinky A/C. Do a search on here, there are pics somewhere.

 

[TacoJuan]

There’s a small access port on the driver’s side where you can insert a tube for foaming evap core cleaner. This is usually for stinky A/C. Do a search on here, there are pics somewhere.

Yea I’ve seen posts about that, mine doesn’t smell, just more concerned about debris being built up in front of the heater core


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[TacoJuan]

Doesn't the cabin air filter keep stuff from getting to the heater core? Asking seriously, not trolling the OP.

I thought the same thing, and maybe it does and I don’t understand how the hvac system in our 4runners work. But when you look at the cabin air filter, there’s an arrow printed on it pointing up, designating which way the air should flow through it. But all the debris is sitting on top of the filter, like it was being sucked down somehow. I turned on the fan and put my hand in where the filter goes to see if someone had changed it and put it in upside down, but it was blowing up. So idk lol. Maybe someone else can weigh in.


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[fkheath]

I thought the same thing, and maybe it does and I don’t understand how the hvac system in our 4runners work. But when you look at the cabin air filter, there’s an arrow printed on it pointing up, designating which way the air should flow through it. But all the debris is sitting on top of the filter, like it was being sucked down somehow. I turned on the fan and put my hand in where the filter goes to see if someone had changed it and put it in upside down, but it was blowing up. So idk lol. Maybe someone else can weigh in.


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The arrow is for the install orientation, not the air flow. Outside air comes in the grill in front of the windshield, then down through the air filter. Don't want air to go up through the filter for any debris would fall down below it due to gravity.