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Where is the heater core valve located? - Cars & Trucks

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Most cars have the heater core located behind the dash board on the passenger side. I've not heard of a "valve" that you're asking about however. Without the year, make and model car - it is hard to give a definitive answer.

Posted on Mar 27, 2015


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I got a dodge Strauss 92 it blows cold air how do I flush the heater core I think that's the only thing it could be every thing else seems just fine thank you for any help zak

Locate the heater core of your vehicle by finding the two rubber hoses going into the firewall. Your heater core is inside the firewall, between the engine compartment and the cabin of the vehicle. Detach the two hoses from the heater core valve stems by loosening the spring clamps around the hoses with a screwdriver. Twist hoses back and forth carefully to remove from valve stems and move hoses out of the way.

Run water through one of the valve stems by turning on the garden hose and placing the end of the hose on the valve stem. Flush out the heater core this way until you see clear water coming from the other valve stem. Turn garden hose off.

Replace the two rubber hoses from the engine and secure to valve stems by tightening screw clamps with screwdriver. Be careful not to over-tighten.

Turn car engine on and turn on heater fan to test and verify that heater is working.

Feb 02, 2016 | Dodge Cars & Trucks

2 Answers

Where is the heater core located? Will I have to remove the entire dash to get to it?

Pass side behind glovebox, and No just glovebox area has to come apart.

Mar 08, 2011 | 2003 Chevrolet S-10

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1998 mercury grand marquis heater doesnt work only cold air comes out the air cond works fine the enginecoolant is new, the engine doesnt overheat.

Either your heater control valve is not properly operating or your heater core is clogged. Locate the heater control valve under the hood, should be close to firewall on heater hose, have someone adjust temperature from hot to cold and see if you can see the heater control valve operating if so replace the heater core, if its not doing anything replace it(heater control valve).

Feb 19, 2011 | 1998 Mercury Grand Marquis

1 Answer

Heater core valve location?

there are two heater hoses coming from the engine going into the firewall where they attach to the heater core. if there is a valve, it will be in one of those hoses. not all vehicles have a valve in that line, they just let the coolant circulate all the time.

Jan 20, 2011 | 2000 Daewoo Leganza

2 Answers

1999 cherokee sport, no heat- new thermostat and coolant help its cold outside

check the water control valve in the heater hose inline to the heater core

Mar 06, 2010 | 1999 Jeep Cherokee

1 Answer

Just replaced heater core. Had heat for first week. Now I have very little heat on passenger side and none on driver side. All vents blow air.

You might have an other coolant leak, but sounds like coolant is not getting entirely into heater core. Check both your heater hoses to see if they are equal temperatures and also the coolant level. If both are ok check to see if there is a heater core valve that when heat is selected it provides vacuum to pull open a valve that directs coolant flow to your heater core. the valve is located in-line with the heater hoses.

Feb 27, 2010 | 1998 Dodge Ram 1500 4WD

1 Answer

I cant locate my heater control valve, where is it???

The heater flow can be checked by feeling the hoses at the inlet and outlet to the heater core. If the heater has a control valve and it is open, both hoses should be warm. This indicates that coolant is flowing through the heater core. If the outlet hose is cold, there must be an obstruction in the heater core or control valve.
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Oct 27, 2009 | 2000 Ford Expedition

1 Answer

The heater quit working in my 2003 dakota 3.9 liter v6. A liitle heat comes out, but not much even with the gauge turned on high. Fuses in truck look good, coolant level good. Where is the location of the...

The control valve could be damaged or you could have a blockage in the heater core. Locate the valve in the engine compartment and watch it while someone inside the truck moves the heater lever back and forth. You want to verify that the valve is moving to open and close the pipe into the heater core. If that checks out ok, try to flush the heater core.

Oct 03, 2009 | 2003 Dodge Dakota Club Cab

1 Answer

Cant shut heater off

A manual or automatic valve in the heater core hose used for opening or closing, providing coolant flow control to the heater core. did you mean that or the blower

Aug 08, 2009 | 1996 Ford F350 Crew Cab

2 Answers

1996 crown victoria has no heat

the temp blend door may not be rotating from the a/c evaporator to the heater core opening.

Could be the motor on the blend door or the temp control knob.

Do you have manual a/c or electronic temp control?

If it's the a/c door electronic actuator motor, it's on top of the plenum. Have to remove the instrument panel for access.

Hope it's the temp knob on the control head.

top one is the circuit you are looking at

Apr 23, 2009 | 1996 Ford Crown Victoria

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