04-07 Honda Accord No heat issue. Heater core flush and heater valve. #No Heat

Working on a 05 Honda Accord to fix the common no heat on driver side issue. I will cover the steps in Changing the heater valve, doing an heater core flush, Testing the blower motor and coolant flush. This can be used to fix 04 to 07 Acura TL and RL of the same time period.
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[@Jorge01234]

Wow. Thanks. I thought this was some kind of rare issue being that only the driver side was not getting as much heat as it was supposed to. Not as complicated of a problem as I thought it was going to be. I'll have to check it out tomorrow sometime after work.

[@shawnwright240]

very helpful. thanks

[@chrisramos__91]

I swear thanks man. did u end up fixing im having this same problem an i did everything u did so far beside what the part u showed at the end

[@AJIMPORTS]

No I did not swap the heater box. But I did check inside the center vent and I saw where the flap would not move. So if you can get a camera in there you can confirm if thats your issue also. Or just use a long screw driver with the camera and manually move the vent to close so you have hot air.

[@AJIMPORTS]

I did a few video on the heat issue. The black dash was my car. The tan was a customer car. I did not want to go and pull the whole dash out. So once I confirm the issue I told him and he is getting it done at a shop once the heater box comes in.

[@asianlovebug582]

What’s the size of that clear hose that’s my main issue I fixed everything but the heater core it’s a b to change out so I want to flush first!

[@kermitalexander6655]

I gotta get me a blend door been putting it off for some time. Tired of reaching under there doing it with my hands 😂.

[@AJIMPORTS]

Lol. Well atleast you know the problem.

[@abelgunnar7651]

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[@aryanquentin6301]

@Abel Gunnar yea, I've been using Kaldrostream for years myself :)

[@Zero-is-infinite]

What size tubing and what size brass nose did you use when manually flushing the heater core? Thanks for the video 💯

[@AJIMPORTS]

I believe it was a 3/4 hose and a normal water fitting from home depo. Just make sure you turn it on low. If you apply too much water pressure you can cause more damage

[@Zero-is-infinite]

@@AJIMPORTS thank you I went to Home Depot for some plumbing maintenance 2 days ago and indeed they had it I just didn’t know what size to get 🙌🏾🙌🏾

[@kermitalexander6655]

Man I appreciate your videos 😁

[@AJIMPORTS]

Thanks, just hope these videos are able to help ppl.

[@tomasztarnowski8501]

Hi after removing the valve, you can see inside as if the valve is not fully closing. could this be the reason for the heating failure? passenger side is ok. driver side is blowing cold. Thanks

[@AJIMPORTS]

The heater valve that was on the firewall was broken. So all the antifreeze would flow into the heater core even when you have the ac on. It would cause the ac to be warmer because the antifreeze was not closed off. If you changed or tested the actuator on the side with no heat and flushed the heater core. Most likely your issue is inside the heater box under the dash. Where internally the flap that should be closing is broken.

[@chrisramos__91]

I appreciate u man..

[@josecostilla5853]

I’m having this same problem. Drained coolant yesterday, replaced thermostat, refilled and bled it out. Car still overheated, not as bad as before. But I think the verdict on my Honda is the heater core, I can smell coolant coming from the vents. I know I don’t have a blown head gasket because I checked the oil cap, no milky substance in it.

[@AJIMPORTS]

If you think the heater core is leaking. Just by pass it and rebleed the system. That way you can be sure its the problem. Because pulling that heater core out is a pain.

[@tysmith8021]

Mine over heated. Take the hose coolant hose back off and put it on

[@jacobgomez2682]

Checking the oil cap for milky substance is not how you check for headgasket leak, you may be burning the coolant, you may be burning oil, your heater core wont plug enough to overheat your vehicle, if your carpet is soaked and your level keeps dropping then heater core or line leak possible, take it to a certified tech save yourself and us techs from the issues messing with your own car causes

[@messyartTV]

Did u figure out the issue I’m having the same problem u described

[@jacobgomez2682]

@@messyartTV you need the vehicle properly diagnosed, could be water pump, heater core, a leak somewhere, a clog, bad coolant, thermostat, radiator, I can help if you need it lmk

[@iceymalka209]

Hi everybody I’m so confused, I have a single climate (not dual zone) like this specific accord. Does this vehicle still have 2 door blend actuators? One on the driver side and passenger side?

[@AJIMPORTS]

Never worked on a single zone unit before. Best suggestion is go to honda parts and put in your Vin. See what comes up. But if I were to guess I would say you only have 1 on the driver side and the other to control the vents position.

[@vonwynns1758]

What are the 2 hoses called. Need to get them for my car

[@AJIMPORTS]

The heater core hoses

[@robmen1402]

You're suppose to use distilled water when you put water in your coolant system if you're going to run it.

[@AJIMPORTS]

Yes on normal installation but when you flushing out the system and trying to unclog the heater core. You use normal water for the volume and pressure.

[@epipolarus]

You don't seem to understand how heat core works: the blower blows through the small radiator (heater core), then the warm air gets into the cabin. If there is any heat from any of the vents, it has NOTHING to do with the heater core or water valve. It only means the hot air is not directed properly, which means the blender door motor, mode motor, or blend door binding. That's why you didn't fix the problem.

[@wilsonrodriguez3091]

My heater valve blew and i replaced it and the ac works but i have no heat?? Need help ac works just no heat and my car doesn’t over heat either.

[@AJIMPORTS]

Are you sure you bleed out all the air in the system. and you have to check the actuator is moving when you change from heat to AC.

[@MrBetocampa]

So what was the fix , did every step you did on the video and still no heat on driver side.

[@AJIMPORTS]

Fir this car the hvac box was bad. But I just learned that the cabin temp sensor which is on the driver side can also go bad. If you look by the gauge cluster. The bezel that hold it in place. On the right side you will see some grill. The sensor is behind that. Clean it and see if that helps

[@AJIMPORTS]

Or use a scanner to see what the temp is showing I side the cabin

[@MrBetocampa]

Ok I will check it out thanks for the info

[@MrBetocampa]

I tried that in car temperature sensor and still nothing, where is the hvac box?

[@AJIMPORTS]

@@MrBetocampa you have to remove the dash board. It's behind the radio. It's a big job. Do better make sure that's the problem

[@x7yo7x]

Hi, I have same problem on my car, one side is warm, other side is cold. It's really frustrating, because it's 0 degrees celsius where I live. Did you find the problem at the end?

[@epipolarus]

Blend door motor (actuator)

[@joem9985]

@@epipolarus Why are you saying the issue is the blend door actuator? He clearly showed that is was working.

[@epipolarus]

@@joem9985 who is "he"? the guy in the video or x7yo7x? There are 2 blend door actuators, one for each side. One side cold, one side warm, what could be the logical explanation?

[@joem9985]

@@epipolarus @J. M. @J. M. The guy in the video. Based on this video and my observations, the actuator on the drivers side controls the flap that allows either the cold air or hot air to come through. The actuator on the passenger side controls which vents the air flows out from. The actuator arms on the passenger side do not move when you change the temperature setting. Also, the car he is working on has single zone climate control not dual zone. I have a single zone climate 2006 accord just like in the video and I did try replacing the driver side actuator but it didn't make a difference because the old one was moving the two white arms just fine.

[@lewismaxamillion1909]

@@joem9985 did u ever figure this out can someone please 🙏 help of not read my post it mite help

[@MrSteveehunt]

I had only heat on passenger side and none on drivers side .. So I replaced the drivers side actuator but now I have no heat at all.. Can you please advise? 🥶

[@AJIMPORTS]

Thats very weird because the passenger side has its own actuator. Check to make sure the two hose going to the heater core is hot after the car warm up. If not then you might have a clogged heater core. Also remove and double check the actuator on the driver side. See if you get heat with it removed by manually moving the levers on the box.

[@MrSteveehunt]

I managed to get the heat back on the passenger side of the car by removing the actuator and refitting but still cold on the drivers side and I’ve checked the hoses and they are both hot .. weird!

[@AJIMPORTS]

@@MrSteveehunt If the actuator is working fine on the driver side now. Iwould try to flush out the heater core a few times. If that does not work the prowm may be the hvac box under the dash. The internal vent might be broken or the heater core is clogged and need replacement.

[@MrSteveehunt]

@@AJIMPORTS I’ll get back to you in this as I’m working shifts at the moment thanks for your videos they are very helpful 👍

[@lewismaxamillion1909]

Yo did u figure it out if not I think I found the problem 🤔 hit me up if u need to know .

[@AJIMPORTS]

Go a head and share the info. I believe the hvac box went bad. Internal it's not switching the vents.

[@lewismaxamillion1909]

Fro. The crook mechanic in the hood who had the car before I. THAT'S WHY I AGREE WITH DIY ATLEAST U DONT GET FUXXD WEN YU KNOW HOW SHIT WORKS AND YOU WON'T KNOW TILL YU TRY URSELF PLUS I HAD BAD EXPERIENCE WITH SHADY MECHANICS FULL OF SHIT OLD MEN AMD WORST WENTHEIR ARE POLISH UKRAINIAN THOSE GUYS SEE A HISPANIC WITH A BENz and thee gestapo prices come out☝️🤣🤣fuk them crooks

[@lewismaxamillion1909]

The mechanic before me stole that cabin Air sensor tubing with the ASpirator I believe. Because the owner stated she needed freon in the summer so she takes it to shady Mechanix he steals part outta car in hopes she returns In the winter like he suspected because he took a heating element out the car to drum up business in the winter . Because fast forward the customer doesn't need ac nomre it's cold in nj in late October so now she turns heat on nothing no hot air coming from vents My question is the timeliness seems suspect and i think that's what happened they stole a peice I didn't know was missing

[@lewismaxamillion1909]

My bad it's called AN ASPIRATOR

[@AJIMPORTS]

If aspirator hose is damage it might cause this issue. because it connect to the air sensor for the cabin. so their is a chance that sensor is bad or going bad. Thanks i did not even realize that sensor was there.

[@Mabalzitch2024]

Thank you for the video, helped me out!

[@AJIMPORTS]

Glad it helped!