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How do the hoses go on a heater control valveon a 1991 jeep Cherokee?
Wiki User
∙ 16y ago
There are two hoses that come from the thermostat at the top end of the engine at the front of the car. These two hoses go back to the firewall. Just above where they enter into the firewall there is a vacuum switch. It has two small hoses feeding it. One of the hoses gets its vacuum from the intake manifold and the other gets eventually fed to the heat control valve.
The heat control valve is located on the opposite side of the firewall. You will notice that when the engine warms up the top hose is much hotter than the bottom hose. Upon start up the bottom hose might be moderately warm because a small amount of warm coolant will flow through it. After the engine is warm this coolant flow will stop because the heat control valve is closed even though you have the heat at maximum. Simply unplugging the electrical connection to the vacuum switch will open the heat control valve and you should have heat inside your vehicle again.
You can also bypass the vacuum switch by unplugging both vacuum hoses and getting a piece of hose to connect them together. This will give you more heat. Ultimately the vacuum switch needs replacing. Also note that flushing your radiator core is easy to do. You should be able to connect a garden hose to the top hose and flush out the core. The heat control valve does not prevent this when the engine is off. Ultimately, you are asking this question because when you turn on the heat in your Jeep it blows cold air. You might find the heat control valve but realize that it really isn't the problem. It is the vacuum line controlling this valve that is the problem and the vacuum switch connected to it.
The grand cherokees never had the water valve.
Wiki User
∙ 11y ago
Wiki User
∙ 16y agoIt is a strange looking part under the hood tapped into the heater hoses on the left side of the valve cover(when standing by the grille). Between the oil filter and the firewall. It has a vacuum hose coming out of the top of it that goes through the firewall to control the different controls of your heater (eg. vent, heat, defrost)
Wiki User
∙ 9y agoYou can obtain a 2000 Jeep Cherokee heater control valve diagram from most Jeep or Chrysler dealerships. The heater control fell diagram can also be found at most auto-parts stores.
Wiki User
∙ 16y agoHope this helps and is not to late.
Wiki User
∙ 13y agoThere is no such part on a 1999 Jeep.
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Is the heater control valve really necessary on a 1989 Jeep Cherokee?
No, it is not required. You can remove it and splice the heater hoses together.
Where is the heater control value on 2001 jeep Cherokee sport?
In line on the heater hoses on the passenger side of the engine. Has a small vacuum line to it and both heater hoses go through it. The heater hoses are smaller than the radiator hoses and go through the firwall.
How do you get air out of coolant system on Cherokee 4.0?
jack the front end up and support it then remove one of the heater hoses
Jeep Cherokee heater does not blow hot air?
with any no heat complaint the first thing to check is going to be the coolant level. then make sure the vehicle is reaching proper operating temperature and that the thermostat is not stuck open or anything. from there check and see if both of the heater hoses are getting hot, those are the coolant hoses going into the firewall towards the passenger side of the vehicle. if one is hot and the other is cold that means you have a restricted heater core. you can try to backflush the heater core by taking a garden hose and connecting through the outlet side of the heater core and spraying out the inlet side. if that does not work you will have to replace the heater core. hope that helps.
Ac works but heater blows cold air?
heater hoses might have been disconected
Is the heater control valve really necessary on a 1989 Jeep Cherokee?
No, it is not required. You can remove it and splice the heater hoses together.
Where is the heater control value on 2001 jeep Cherokee sport?
In line on the heater hoses on the passenger side of the engine. Has a small vacuum line to it and both heater hoses go through it. The heater hoses are smaller than the radiator hoses and go through the firwall.
Does the heater hose on a jeep grand Cherokee Laredo connect to the thermostat housing?
On a 4.0L, yes one of the heater hoses does.
Where is the heater control valve on a 1999 Jeep?
near the fire wall where the heater hoses enter
Why is your car defrosting on the inside and coolant leaking on the passenger side?
the heater core, heater core hoses or heater control valve is leaking
Why is there no heating in your Jeep Cherokee Sport?
1. Is coolant flowing through the heater hoses and heater core? Once the care is fully warmed up, running, and the heater on, the hoses going to and from the heater core should be hot to the touch. If not, coolant may not be flowing. 2. Is the heater door, under where people's feet are, broken? This URL may help explain http://www.heatertreater.net/jeep Cherokee 97-04.html
Why would your ac work but not your heater in your 95 intrepid?
They are entirely different systems. One does not control the other. You have a problem in your heater core, heater control, water circulation or hoses.
How do you get air out of coolant system on Cherokee 4.0?
jack the front end up and support it then remove one of the heater hoses
What does the Heater and rad hoses do?
rad hoses route coolant to the engine to maintain operating temperature (to keep engine from overheating). Heater hoses supply the heater core (inside most vehicles) with hot water, when heater/ac temperature control knob is turned toward hot, to heat the interior of the vehicle by opening and closing a water flow control valve allowing water to enter the heater core for heat. =;)
Where is the thermostat in Jeep Cherokee?
The thermostat on a straight 6, 4 litter Jeep Cherokee is located on the very front of the engine. Just follow the valve cover to the front of the engine and you will see the thermostat housing it has two heater hoses coming out of it (one to the radiator and one to the heater core). Simply take out the bolts holding the housing on and remove the heater hoses and the thermostat will pry right out.
Where is the heater control valve in 2005 Chrysler Pacifica located?
If you are looking for a valve in the heater hoses that restricts coolant flow, it does not have one.
Where is the heater control valve on a 1995 Astro and how do you replace it?
I have a 94 Astro but the heater control valve should be in the same location. Look under the hood on the passenger side. There are two heater hoses behind the coolant reservoir and windshield washer reservoir. The hoses attach to the heater control valve. The valve has a round vacuum actuator on the side, and two more heater hoses leave the control valve and go into the heater core housing. Cost for the valve will probably be somewhere between $50 & $70 To replace it, remove the coolant reservoir and the windshield washer reservoir. Remember, or mark, the hoses for the washer if you have a rear washer. The electrical connections only go on one way. Remove the clamps securing the front heater hoses and remove the hoses from the valve. Remove the clamps holding the heater hoses coming off the back of the valve where they are attached to the heater core. These two hoses are factory attached to the valve and the new valve (from the dealer) comes with the hoses attached to the rear of the valve. The clamps are back in a small space behind the valve, rather hard to get to. We pulled the bracket with the three square relays situated above the hoses to allow easier access. Install in reverse order. Good luck.
