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Heater diagrame 2000 jeep cherakee

Can't get it to blow hot air heater hoses are hot .? but no heat

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On the passanger side in the heater box you got the motor for hot and cold trap the motor stick sometime if you whant to try warm up the cherokee put it to heat bang the heater box the motor should move to heat .before normally one day the heat work fine one day no heat that the motor that defective check that out if it not that there a few other thing that i can help you thanks for using fixya pierre

Posted on Feb 05, 2008

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Heater only blows hot air intermittently.


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Nov 01, 2015 | 2005 Jeep Liberty Sport

1 Answer

Heater runs but does not heat


If it is blowing air at different speeds inside the car, I think you are saying the blower works fine, but blows no heat.
If it is running different speeds but is not blowing inside the car, you probably have a plastic flap inside the heater assembly inside the car that is not opening, not allowing the air to come in.
That might likely be a vacuum issue, or maybe a mechanical one. (whatever is supposed to open the flap)

If the flap is working and you are getting different amounts of air inside the car according to the speed of the blower fan setting you have selected, go to the engine temperature.
Is the radiator getting hot?
Have you a temperature gauge to tell if the engine is hot?
If not, you will need to warm up the engine, and then determine if there is hot water in the radiator.
If you pull off the cap to see, it could blow up on your face, so you will need to find someone who can help you with this.
If the radiator is hot after about 10-15 minutes of the motor running, you are perhaps not getting hot water to the heater.
You would need to check the temperature control to see if it is working. This is often a mechanical switch located near the firewall of the Jeep under the hood. Usually it is the size of a small fist, and has a heater hose running into and out of it, and has a wire attached to the top.
It might have a wire to it that should move when you select hot or cold inside the jeep at the control panel. Sometimes the control wire will rust or break.. The heater hoses should be hot if the hot water is running through them.
If your radiator is low on coolant, often the heater inside the car will not work.

Jan 01, 2013 | 2000 Jeep Wrangler

1 Answer

What if the heater hose going in is hot and the heater hose coming out is cold.the heater will blow cold air


Possibly the heater core is 90% blocked. open enough to draw hot water in, (hose feels hot) but not enough volume to provide heat from very cold air, 10% hot water gets cold quick, coming from core..
Flush heater core in reverse direction - cold side in hot side out..

Just a theory..

Dec 14, 2010 | 2000 Chevrolet Silverado

1 Answer

2002 jeep cherakee crusie control and heater


sounds like you have a vacuum leak somewhere or a faulty check valve. the air control and speed control are both vacuum operated. check for cracked vacuum hoses under the hood. The Jeeps also ran a check valve either near the intake manifold or near the a/c and heater core lines where they enter through the firewall or some had both. to check the valve, remove from the lines and try to blow through both sides. should only allow air to flow through from one side. if you remove pay attention to how it was installed so you can reinstall in the correct direction

Jan 08, 2010 | 1995 Jeep Grand Cherokee

1 Answer

Plenty of air but no heat one side of dash use to blow hot air. Now neither side blows hot air. 2000 jeep grand cherokee coolant is fine driver side seat heater doesn"t work air bag light comes on every...


Check to see that the blend door linkage is hooked up. Doubtful it is heater core, as you had heat to one side and not the other. Check coolant control valve linkage, verify it is moving the coolant valve from off to on when you switch temperature from cold to hot. Verify you have coolant flow to the heater core by feeling the heater hoses where they enter the firewall. If all checks out well, then look at hvac controls individually.

Jan 06, 2010 | 2000 Jeep Grand Cherokee

6 Answers

2000 Jeep Grand Cherokee Heater is not working fan is working and blowing air just it is not blowing hot air. Ac is working. Do you know what it could be and a possible quick fix. Anti freez levels are...


blend door actuators. If you have the AZC system (automatic zone control) used in the limited (the one with dual digital readouts) you can use the on board diagnostic to read the code. while running, press the a/c and recirc buttons at same time then turn drivers temp control one click clockwise. release a/c and recirc buttons. If you have codes that show up, write them down and google search for these codes. It will tell you exactly what is wrong.

Nov 11, 2009 | 2000 Jeep Grand Cherokee

1 Answer

The heat in my 1992 Jeep Wangler is not working.


The only reason it won't blow hot air is because the water is not getting to the heater core. Check to see if you have a heater control valve in one of the two lines to the heater core. If so check to be sure that is is opening and closing. If it won't open then you get no water flow in to the heater core.

Feb 04, 2009 | 1998 Ford F150 Regular Cab

3 Answers

Heater blows cold air when idle


Sounds like you may have a partially plugged heater core. You could flush this out separately, from flushing radiator & engine block. Diconnect heater hoses going to your heater core and clamp off, so not to loose coolant from engine. Now hook up separate hose to one side of heater core pipe and flush out with typical garden hose. Repeat procedure on both heater core inlets. Reconnect original heater hoses and test difference. You may have to add an additional litre of antifreeze. If this don't work i suggest changing heater core. Good luck.........Ron.

Jan 03, 2009 | 2000 Jeep Grand Cherokee

1 Answer

1992 Jeep Wrangler heater not blowing hot air


How often has the coolant been changed? My only guess is that it hasn't and the hoses and the heater core are plugged up with goo and a flush is needed

Dec 05, 2008 | 1992 Jeep Wrangler

1 Answer

Heater only blows warm air.


The hoses from your heater core should be very hot to the touch. Check the hoses going to the core from the water pump. It should be very hot. The return hose should also be very hot. Now check the hoses going to the core. If they are not the same temp, then your heater control valve is not working correctly or the vacuum is not working. At any rate, locate the vacuum line going to the heater valve. Remove the silver bar on the valve from the plastic plunger arm. You will have heat all the time now if it was only a vacuum problem. You can fix it later when it's warmer out. BTW a 200* thermostat will make your heater even hotter.

Nov 21, 2008 | 1998 Jeep Cherokee

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