Where is heater core located

heaters are called heat exchangers, from hot engine coolant 180f to air in the cab box, called AC/heater air distribution box.
so if scans show the ETC engine temps are good, then most times
the cause is in the cab, heater box
top cause of fails in the cab (tests for all) ask
are (add word heater to all) blower works so not that.

• heater damper stuck, closed or nearly so, at core heater
• core is packed full of rust and gunk inside corfe.
• core air side fins packed in, leaves, or insect nets or ?
• controller failure to heater damper failing.

if both fire wall heater core tubes are both 180f then core is no bad in the water side, if one is way cooler the core is packed, up
in that case we back flush it hard. HOses off)

not knowing the make model and year it is hard to say
however as all cars are assembled in the factory with the heater core already installed , it generally becomes easier to remove the dash to exchange the heater core
talk with a radiator shop or a service center for how to do it

Inspect/Replace If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

• The heater housing is usually under the dash and must be removed to gain access to the heater core.
• Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.

The heater housing is disassembled to get to the heater core. Heater Core

• Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
• Remove the heater coolant hoses.
• Remove the cable and/or vacuum control lines (if equipped).
• Remove the heater core securing brackets and/or clamps.
• Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
• To reinstall the heater core, reverse the removal steps.

When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Sounds like your heater core could be blocked up or a blockage in the pipes. Most car heaters run off a heater core that cycles hot water from the engine's water jacket, or a heat exchanger around the exhaust manifold, through the core, with a fan then blowing this hot air through the vents to you. If the pipes from the water jacket to the heater core are blocked then no hot water will get through. Alternatively, the heater core or pipes may be damaged and leaking. Check to ensure you're not losing any coolant. If it's the heater core, there's really nothing for it but to replace it. I'm not 100% sure where it would be on your car, on my old car it was up behind the centre console, under the dash. Hope that helps. Cheers, John

If there is white smoke coming out of that location, chances are that you have a heater core leak. Hot radiator fluid passes through 2 smaller radiator tubes to the heater core. Air from the fan is passed over the heat exchanger, and hot air blows out. White smoke = steam. You can block off the heater core tubes until you can get it replaced.

Hello, the heater core is a small heat exchanger located inside the truck, similar to the radiator at the front of the truck. Coolant is circulated from the engine through the heater core and back to the engine. The heater fan blows fresh, outside air through the heater core; the air is heated and sent on to the interior of the truck. For Toyota Pick-ups/Land Cruiser/4Runner 1989-1996 check this reference repair guide...



Heater Core - REMOVAL & INSTALLATION
(see Figure 1)

1. Drain the cooling system.
2. Remove the heater unit assembly. Have a lot of towels handy for the leakage of coolant that may spill into your interior.
3. Remove the fasteners securing the core to the unit, remove the plates and clamps. Pull upwards to remove the core from the unit.

To install:

1. Inspect the core fins for any blockage. Using compressed air, clean them.
2. Install the core into the unit placing the plates and clamps into position. Tighten the core screws.
3. Install the heater unit into the vehicle.
4. Fill the cooling system.

Thanks

Under the middle of the dash is a part called a blend door actuator it is located between the floor board and the heater housing. It control the door that opens and closes allowing heat to exchange.These go out all the time.

Could be a heater core plugged or improper adjustment on the heat exchanger cable. Turn your heater on high and go under the hood and feel the two hoses on the passenger side coming out of the firewall. See if both hoses are hot when the engine is at operating temperature. If they are both hot then there is probably a problem with the cable adjustment or heat exchanger door not functioning right. If only one hose it hot then your heater core is plugged which means changing the heater core or you can take it to a radiator repair facility and they can hook up to your vehicle and can sometimes clean your heater core. We have had success at doing a bunch of plugged heater cores this way. Worked in most all cases.

under the hood rh side ( passngr ) split the heater boxes r&r as required

hope2help shack

It`s the heater matrix leaking.
It`s either corroded and burst or the pipes which feed it are split.
If you look under the hood, you will see two water pipes made from black rubber going into the bulkhead through to the inside of the car.
Remember where they are and look under your dash to find them.
You may need a torch,
let me know what you find
good luck