Question about 1995 Toyota 4Runner

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Where are the heater core hoses at under the hood of a 95 4runner 3.0 I am not getting hot air just warm I want to try to flush it out Thanks. Jeremy

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  • Toyota Master
  • 5,370 Answers

Regarding this types of problem,i suggest you to go through this help links.Click the link below to go through the procedure and troubleshoot the problem :----HOW TO REPLACE AN UPPER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-upper-radiator-hose.html

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HOW TO REPLACE A LOWER RADIATOR HOSEhttp://schematicsdiagram.blogspot.com/2011/07/how-to-replace-lower-radiator-hose.html
----------How to Flush Heater Core?http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html
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For heater core replacing procedure. I suggest you to go through this related help links.Its all complete step by step procedure: ----How to replace heater core for All car models?

Click the link below: ---

http://technoanswers.blogspot.com/2011/11/how-to-replace-heater-core-for-all-car.html

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How to Flush Heater Core?

http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html

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How to Remove Heater Core ?

http://howtobyme.blogspot.com/2011/12/how-to-remove-heater-core-on-2008-honda.html
Heater Core Replacement?

http://howtobyme.blogspot.com/2011/12/honda-heater-core-replacement.html

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To replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on.html------

How to replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on_10.html
How to replace heater core on Buick Regal?

http://howtobyme.blogspot.in/2012/02/how-to-replace-heater-core-on-buick.html
----------This will help.Thanks.

Posted on Feb 18, 2012

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Posted on Jan 02, 2017

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  • 3 Answers

SOURCE: I have a 1997 Toyota

It very possibly could be the actuator that controls the valve that allouws hot water to flow through the heater core. If the out hose is cold then there is none or not enough hot water flowing through the core itself. If you are sure the cooling system is full and you are sure the core is not leaking (you would smell the anti freeze if it was leaking very much at all) then the only thing left is flow and if the water pump itself is working as it sould then I would say either the core has something restricting the flow and that could be a hose that has a kink, or a blockage of some sort(rare but it happens) or the heater control valve is not functioning as it should so the valve isnt opening (I think its controlled by a vacume line going into the back of the knob that is on the dash. I had a 97 Tacoma V6 and the heater would literally melt you to the seat. If you check all that and dont find a problem then I would like to know what you do find if you ever figure it out. Hope that helps you at least have some places to start.

Posted on Jan 28, 2009

blueextc3221
  • 15935 Answers

SOURCE: what is the ALT 80 fuse under the hood? 1990 4runner

It is your alternator Fuse - The alternator fuse is bolted to the wire connectors, you will have to pull the fuse holder up by releasing the plastic tabs with a small screwdriver then you can get to the bolts to replace the fuse, make sure the battery is disconnected before attempting this. Check the rest of the fuses especially the EFI fuse.

Usually the ALT fuse only blows if the battery was recently jumped BACKWARDS.

Posted on Jan 31, 2009

  • 496 Answers

SOURCE: I have a 1991 4Runner. The heater throws cool

check for a vacuum operated heater valve located on the engine side of the firewall. This black plastic valve has a vacuum line to it as well as hot water inlet hose from the cylinder head and a heater by pass hose. The vacuum line may be off, but even if you have good vacuum to the valve, the internal diaphragm may be torn--so no operation of the valve and no heated coolant to the heater core. I you have a vacuum test tool (a small vacuum pump with a gage) you can test and see if the valve will hold vacuum. If not, the diaphragm is damaged and you will have to replace the valve.

Posted on Apr 01, 2009

goody2shoe
  • 109 Answers

SOURCE: no water flow through heater core no heat

might need new heater core ....thermostat stays open ...it is definitely plugged then ..so change it ....the heater core ....

Posted on Jan 03, 2010

  • 290 Answers

SOURCE: No heat/defrost 01 corolla

Sounds like you have air trapped in the heater core when you flushed the heater core. loosen the upper most heater core hose and run the engine untill coolant seeps out. Wait until the coolant has reached running temperature.

Posted on Jan 18, 2010

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1 Answer

The heater is blowing cold air when on hot setting, thermostat replaced?


Could be a few problems causing this. Check to see if both heater hoses are hot going into and coming out of the heater core from under the hood. If both hoses are hot then there is an issue with the blend door/s inside the heater box assembly. If only 1 hose hot at the heater core and the other hose warm/cool you most likely have a heater core restriction and a back flush will be required. If no hoses are hot at the heater core then you have air in the system or the coolant level is low

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are you talking about your heater core for heat in the truck ? is there a valve in the heater hose that you have to open to get the hoses hot to the core this is under the hood , follow the hoses , could be clogged core , does it over heat , or get up to temp should be about 190 normal temp for most motors why did you change these parts anyhow , did you use the radiator fix bars leak stuff that you put in , bars leak , if so you may have clogged your core , take the hoses off the core and blow it out ,pain in the but you went this far , ck for that valve to open

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When heat control is set to max hot and fan speed at max, air is slightly cool to warm, not hot.


check the coolant hoses going into the heater core. they are the hoses running through the firewall under the hood. if they are both hot, you way have a heater core blockage. a heater core flush should solve this. if it does, you should follow up with a complete cooling system flush.

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My heater in my dodge caravan does not blow hot air. When my engine finnaly heats up, it blows only warm air. Its a 2006


First of all make sure your anti-freeze is at specification level's as well as make sure With the engine cold start the vehicle remove the radiator cap and make sure you see the flow of anti-freeze while keeping your hands as well as your clothing away from moving parts feel both hoses going into your heater core if the one on top of hot one on the bottom is cold then you have a Clogged heater core in which case you will need to flush the system . a simple garden hose will do the trick simply remove Both hoses to the heater core with the hose at the bottom line apply the garden hose until liquid comes out at the top of the other hose will probably see a lot of gunk. Also ensure that the vacuum line to the round ball under the hood is connected and not dry rotted.this will cause a vacuum leak to not allow the switch to fully engage from cold to hot. I hope this helps you.


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How would i tell if the heater core is clogged?


Under the hood there are two heater hoses going into the heater core,with engine good and warm,both heater hoses should be hot to touch,if only one is hot,and the other is cool to warm,then remove both heater hoses,nad flush the heater core out with a water hose.

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Hi There, If the fan blows only cold air, then you might have a restriction on the heater core. The heater core is like a small radiator inside your dash. The coolant flow through it can be restricted by corrosion. The lack of flow of coolant through the heater core will result in a lack of warm air inside the car. Flushing out the heater core may help. If not, you will have to replace it. I would say though, 80% of the time the cause is just restriction. Get the heater core flushed and I am sure you will get your heat back. MIke

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