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No, it is not required. You can remove it and splice the heater hoses together.

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Q: Is the heater control valve really necessary on a 1989 Jeep Cherokee?
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What does the differential do in a 1989 Jeep Grand Cherokee and what happens if it doesn't work and or go out?

Please, rephrase the question. You say you have a 1989 Jeep Grand Cherokee, but the Grand Cherokee did not come out till late 92, but was considered a 93 model. If what you really have is a 1989 Cherokee, we need to know the motor size. The rest we can look up and give you the best answer possible.


How do the hoses go on a heater control valveon a 1991 jeep Cherokee?

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.


What is the Rod Bearing Oil Clearance for a 1995 Jeep Grand Cherokee?

I don't know,but who cares anyway? I mean Really!


How do you hot wire 1990 Jeep Cherokee?

First its got to be real dark, any unlit alleyway would be sufficient. A flathead screwdriver, paper clip and box knife will be necessary............ Do you really expect thhis question to be answered? Even if it were a legitimate request, making the information available to potential criminals would be rather irresponsible.


Is a Muffler Heat Shield needed on a 2000 Jeep Cherokee Sport?

The heat shields on the Cherokee models are needed. The floor pans in the Cherokee models are thin and are penetrated by heat very easily. If you have driven one much, you will notice that the drivers and passengers front floor pans get quite warm from the engine heat. This is true with the muffler also. If it is not shielded the floor will get really hot and penetrate into the cab.

Related questions

Where is the heater control valve in Ford Fiesta?

its in the engine bay at the bulk head ,two heater pipes come off engine to it easy enuf to change really common fault


How does the heater control valve for f150 operate?

There really isn't a heater control valve. The coolant flows through the heater core at max pressure and temperature is controlled by controlling the amount of air flowing through the heater core. This is the function of the blend door and this is a fairly common failure on Ford trucks. Check heatertreater.net for diagnostic information and suggestions on how to repair the system.


Where Are The Cherokee People now?

The really Cherokee people are no more. There are no full blooded Cherokee people left.


How do you run the on-board diagnostics for the Automatic Zone Control dual climate control in a 2000 Jeep Grand Cherokee?

TAke it to the dealer where they have the proper machines. That last answer really sucked, spoken like an union mechanic. Go to this link: http://www.justanswer.com/questions/1jjd3-2000-grand-cherokee-split


Are employee benefits really necessary why?

Are employee benefits really necessary? Why?


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No not really


97 gmc Yukon My question is that your heater in the truck does not push out any air from the vents AND if any air does comes out it is warm not really that hot?

The vacuum tube to the heater control is broken in two or cracked...usually in the engine compartment. It's a black, hard plastic tube or pipe about 3/16" od. Without vacuum, the heater control cannot open and close dampers to direct air flow.


What is the duration of Is Your Honeymoon Really Necessary?

The duration of Is Your Honeymoon Really Necessary? is 1.33 hours.


What is really called a water heater or hot water heater?

It's called water heater. There isn't a reason to heat hot water


Why did Cherokees slit their ears?

The Cherokee did not slit their ears. The Shawnee did, and some Shawnee joined the Cherokee tribes. So, any ear slits were a tradition of the Shawnee and not really Cherokee.


How do you change the heater core on a 1993 Pontiac Bonneville?

This really is a pain The heater core is in a tray like thing under the dash in the centre of the dash It is a real pain to get this out without breaking it and then without damaging the heater core. You really really need a manual with pictures to do this correctly


Why is rebellion necessary?

are u sure it really is necessary? i mean it could be necessary as a hoax.