Why does my 99 Jeep Grand Cherokee have no heat?

My 99 jeep grand cherokee has no heat, the air blows out but blows out cold air. It actually blows out whatever the temperature outside is. If it is hot outside I get hot air if it is cold I get cold air. Please help, no one can tell me what is wrong with it helpful? First feel the heater core hoses with the vehicle hot. They should be hot.

What to do if your Jeep heater is not blowing warm air?

Thanks! :thumb: A easy check to see if your heater core is stopped up with dirt on the outside and not letting the air flow thru it freely to transfer the heat to the ducts of the Jeep is to set it on defrost and temp on cold and feel how much air is flowing .

Is it possible to replace a Jeep Cherokee heater core?

Yep every Jeep XJ Cherokee owner has to face it sooner or later, your on your way someplace in your XJ, it’s kinda cold and your heater just isn’t blowing hot air like it should. In this video I show you what it could possibly be. Also it’s alot easier than replacing a heater core. Loading…

What’s the problem with my 2011 Grand Cherokee heater?

SOLVED: 2011 Grand Cherokee. Heater is blowing cold air on – Fixya 2011 Grand Cherokee. Heater is blowing cold air on both side, previously it was just the drivers side with cold air, now it is both sides. I am trying to determine how to access the blend doors.

Why is my Jeep Cherokee heater not working?

What are common reasons my Jeep Cherokee has heater problems? While there are a variety of reasons your Jeep Cherokee heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.

Why does the a / C quit blowing on my 1999 Jeep Grand Cherokee?

The A/C (and heater) quit blowing on my Dad’s 1999 Jeep Grand Cherokee a while back so I took a look at it. The fresh air/recirculate blend air door seems to have broken up in the air duct causing it to suck up against the blower intake and stop all the air flow.

Is the TJ Wrangler heater blowing warm air?

Bought a 2002 TJ Wrangler over the summer and love it. Issue is that it is blowing warm (not hot) air from the heater. I read hundreds of posts on this and think I have done/checked everything. Coolant level is fine. Temperature is running at 210 degrees.

Why does my Chevy Camaro heater not work?

They both should feel warm or hot to the touch with the engine on. If one of the hoses is hot, and the other one is cold, that is a pretty good indication that the heater core is clogged. If the neither hose has any heat, you may have air in the cooling system, low fluid, or low pressure.

Why does my Jeep heater blow outside air?

Driver works fine, but passenger side (defrost, personal, and floor vents) all blow outside air even when you turn the control up to Hi. Change the control from hi to low and back with no change. helpful? I had the same problem I had heat only on one side and then no heat on one side.

What makes a Jeep Grand Cherokee air conditioner work?

The only thing that the air conditioning system has in common with the heater is that they both use the climate controls and the blower motor. It is entirely possible for your Grand Cherokee’s heater to work just fine even when the air conditioner is not blowing cold at all.

Is the Jeep Sport heater hot or cold?

The heater in my 1999 Jeep Cherokee sport does not get hot. The fan works, but it seems the control switch from hot to cool is not funtioning. Air is at best slightly warm (outside above 45 deg) to cold (below 30 deg). Need to know how the flap in the box works, (electrical or vac.)

Why is my Jeep Grand Cherokee not blowing cold air?

One of the most inconvenient vehicular problems is when the A/C won’t blow cold air. If your Jeep Grand Cherokee isn’t keeping you cool, we’ve outlined some of the most common reasons why this might be happening.

Is the a / C blowing hot air or cold air?

I know as a jeep the AC is not its beat feature! Mine blows cold but its no artic blast.. Pull the temp control knob off & make sure the shaft is turning when you go from hot to cold, the knob center may be cracked. If good the blend door actuator may be stuck in the hot position.

Why does my Blend door blow hot air?

If good the blend door actuator may be stuck in the hot position. If you remove it you should be able to turn the door manually to see if you get cold air. If the actuator is not moving, here is a link on repairing it.

Why is my Jeep heater blowing cold air?

The jeep has dual controls,with both set on 85 it still blows cold air on both sides.Both heater hoses are hot. Also, what does the BCM mod do? Does this have any thing to do with my problem/ Anyone have any suggestions? I found this Jim…Maybe it will help you! Heater core maybe gone.

What kind of heater does a Jeep Grand Cherokee have?

My Jeep Grand Cherokee Limited has dual heater control (driver and passenger). Driver works fine, but passenger side (defrost, personal, and floor vents) all blow outside air even when you turn the control up to Hi. Change the control from hi to low and back with no change.

What should I do if my Jeep heater is not working?

Check the thermostat if it stcuk open and the heater core if its clogged-up, if it has an heater control valve check that too-if all okay-could be door problems, vacuum/actuators and HVAC control module. helpful? I have 1999 Jeep Cherokee classic and the heat is not working what can I do?

How to fix a Jeep Grand Cherokee heater blend door?

Our JGCParts Heater blend door kits will fix your heater or we’ll buy it back. 2004 Jeep® Grand Cherokee®. you receive when you turn the temperature knob on the dash. If you turn the knob for hot air, they move up. If you turn the knob for cool air, they move down. them to fall down in the cold air position.

Is the air conditioner working on a 1999 Grand Cherokee?

Conditioning is working on cold but not hot no matter the control knobs setting. Our single zone control can be used on ALL 1999 – 2004 Grand Cherokee® vehicles! On models with dual zone

Where does the heat come from on a Jeep Liberty?

Heat only comes out from top vents. – 2012 Jeep Liberty My heater will not blow on… My heater will not blow on the feet. Heat only comes out from top vents. When i put the heater on feet nothing comes out. The heat shoots out from defrost vents only no matter how high I put it

Why does the AC not come on in my Jeep Cherokee?

If they are lower and the compressor did not come on, then it is undercharged and needs Freon to make the low side switch come on and activate the compressor. Start the car and turn the AC on. Open the low side only valve and allow the charge to build to 30 lbs. on the low side and 150 lbs. on the high side.

What should I do about my Jeep Cherokee heater?

If the instructions with other fixes start out with “remove the heater box”, be ready for considerable work. Removal of the box requires removing the dash panel, evacuating and disconnecting the AC compressor, draining and disconnecting the heater hoses.

What does the thermostat on a Jeep Cherokee do?

Never touch the radiator cap unless the vehicle is ICE COLD. The job of your Cherokee’s thermostat is to regulate the temperature of the engine. It does this by allowing water to enter the engine when it is getting hot, and by keeping coolant from entering while the vehicle warms up.

Is the Jeep AC still blowing cold air?

I replaced all the hoses,water pump,stat. The AC works fine in the summer. The jeep has dual controls,with both set on 85 it still blows cold air on both sides.Both heater hoses are hot. Also, what does the BCM mod do?

What to do if your Jeep Grand Cherokee has no air?

Check if Air flows from the defrost vents below the windshield. If it does, and no matter what U do, then the vacuum hose on engine side is not fitted on the Vacuum pipe there. Just fit it back to fix the problem !

How can I Fix my Jeep Cherokee heater?

Every Cherokee in this range either has, or will have, this common failure. The pictures show the hardware provided for the fix. All work is done from the foot area of the passenger side of the Jeep, with a Dremel cut in the bottom of the heater box…no removal of the dash panel or evacuating the AC system and draining the radiator.

Where is the AC on a Jeep Grand Cherokee?

1. Blows hot on drivers side with AC on. 2. Blows hot on passengers side with AC on. 3. Blows cold on drivers side with heat on. 4. Blows cold on passengers side with heat on. 5. Hear blower but no air blows through any vents.

Where is the air blower on a Jeep Grand Cherokee?

What causes dual zone AC on Jeep Grand Cherokee?

Jeep Grand Cherokees with dual climate control (for the AC / Heater system) that have incorrect air temperature blowing on either the passenger or driver’s side is usually one of two things. One of the blend door actuators (motors), or the the dual zone blend door assembly could have a broken door.

Why is my AC not working in my Jeep Grand Cherokee?

If the fan blower can be heard but there is no air blowing through any of the vents it is most likely that the recirculate door has stress cracked and is broken. The recirculate door can break and fall covering up the blower opening, restricting all air flow.

Why does my Jeep Wrangler TJ have no heat?

Heater not working in my Jeep Wrangler TJ. I tried flushing the heater core that wasn’t the problem. everything else worked just no hot air blowing from the vent. The problem was the heater door Actuator. I show how to trouble shoot and install Heater door Actuator. http://www.oreillyauto.com/site/c/sea… https://www.amazon.com/Dorman-604-020…

Where is the fan on a Jeep Wrangler?

This is the guy in charge of blowing air across the hot heater core, through the Jeep’s ventilation system, and into the cabin. The fan is usually located behind the glove box and when it fails, you may still get cold or warm air through the vents, but it will be at a drastically lower pressure no matter what fan speed you select.

What kind of heater does a Jeep Wrangler have?

Keep in mind, though, the newer the vehicle—such as JL Wranglers and JT Gladiators—the more electronics are involved in the heater system. So it may be beneficial for those with newer Jeeps to take a spin to the dealership, or trusted mechanic, for a diagnosis.

Why does my Jeep Wrangler heater smell bad?

A defective hose, whether it is a connection issue, rot, or they are torn in some way, can cause coolant to leak and you’ll should smell coolant in the engine bay. If that coolant splashes onto the heater core, then the smell probably will intrude into the cabin.

What kind of blower motor does a 2004 Grand Cherokee have?

2004 grand Cherokee limited v8 4.7 here. blower motor (sensor) replaced last month (Not OEM part) due to A whisper of hot and cold air only. The cold and hot air is coming out now but not nearly enough like before to cool entire interior. Have to keep fan on high just to feel slightly comfortable in driver seat.

Why is there no air in my Jeep Grand Cherokee?

Found broken vacuum hose under battery platform going into reservoir, replaced that (my cruise control started working). Cleared check valve in vacuum line near firewall, got a bit of air blowing but still not enough. Finally after reading your idea here, pulled the blower motor to check direction of flow.

Is there a cabin filter in a Jeep Grand Cherokee?

No there isn’t they didn’t make cabin filter in jeeps from 1997 to 2009 or something like that so thats why i was spraying the AC evaporator coil because there was a lot of dirt and debris. One of the dumb moves or smart i guess on Chrysler so it breaks down quick and are forced to pay 2000 to get the AC and heater coils replaced.

What to do if your Jeep Grand Cherokee doors are not working?

You will still be hearing the door actuator moving but the doors are not working. There are 2 fix’s on YouTube. 1 is to cut into the box going thru the glove box and the other is taking the entire dash, council, stearing wheel and the entire HVAC box out and splitting it open to replace the doors.

Why is the defrost setting on my Jeep heater?

The reason why the defrost setting is the only one that is working is because that is the default setting when their is a vaccum problem. Check your vaccum lines under your battery a lot of people have reported by fixing that line has solved this problem.

Why does my Jeep Grand Cherokee have no air flow?

The fresh air/recirculate blend air door seems to have broken up in the air duct causing it to suck up against the blower intake and stop all the air flow.

What are the symptoms of a Grand Cherokee heater blend door?

The usual symptoms are that one side of the cabin will loose heat, followed by the other side at some point. Air Conditioning is working on cold but not hot no matter the control knobs setting. These have automatic zone control and the driver and passenger sides have individual controls. Close the glove box – Your Done! It’s really that easy!

Why is my Jeep Grand Cherokee heater not working?

If your Jeep® Grand Cherokee® heater only blows cold on one side all of a sudden, or seemed to just quit producing heat one day – you most likely suffer from blend door failure. on where you have the temperature setting knobs positioned. These little plastic flap doors hide behind your glove

What kind of heater does a 1999 Jeep Grand Cherokee use?

JGCParts Heater Dual Zone blend doors for all 1999 – 2004 Jeep® Grand Cherokee®. The easiest, cheapest way to fix and restore heat to your Jeep. 1999 – 2004 Grand Cherokee®. The sure way to fix and restore heat to your Jeep®. Make the smart choice.

Why is my Jeep Wrangler blowing hot air?

My 06 Jeep Wrangler’s A/C is fully charged ( it’s been checked ) and the blower is working fine on all settings, but it’s blowing hot air.: Any suggestions will be appreciated…thanks in advance. Pull the temp control knob off & make sure the shaft is turning when you go from hot to cold, the knob center may be cracked.

How long does it take to replace the thermostat on a Jeep Cherokee?

If the temperature continues to climb past that point you may have air in the cooling system or a part of your cooling system may need to be replaced or upgraded. Replacing the thermostat on your 4.0 Jeep should only take about an hour or less, and is a fairly easy job even for the novice mechanic.

Why does my Jeep Cherokee Run so hot?

Lol, but I’d be more likely to put in a 195 or slightly hotter stat in than leave it completely without one Engines with no stat will have trouble warming up, except on a hot day. Then they will run hot and not cool down from the coolant not spending enough time in the radiator to remove heat.

Where is the thermostat on a jeep XJS?

The problem with running hot in XJs is two fold. First, marginal cooling system to start with. Second, the temp sensor for the gauge is at the back of the engine in the head, the hottest place in the engine cooling system. It might be 220° there, but only 195 at the stat.

What should the temperature be on a Jeep Cherokee?

I have never seen an XJ that runs the “195Degree” optimal temperature without help ie upgrades or constant maintenance and low mileage most run about 200-210 wich is running hot to me before I get beat up about that statement keep in mind that is my experience here in Texas with our heat Good replies so far!

How to cool down a Jeep Cherokee engine?

With engine off, remove the temperature sender’s lead and loosen sender until coolant begins to flow out and no more air comes out. Keep an eye on the coolant bottle level. Tighten sender back up and reattach the leads. Top off coolant bottle with 50/50 antifreeze/water mix. Remember! Do this with the engine COOLED DOWN!

Where is the coolant tank on a jeep?

On factory closed cooling systems, that is in the radiator tank on the driver side below/beside air box.) DO NOT DO THIS ON A HOT ENGINE! Pressure in hot/warm engine can blow out scalding hot coolant!

Is there a coolant thermostat for the Jeep Cherokee?

Engine Coolant Thermostat. Your Jeep Cherokee is built to be tough while offering an impressive amount of utility. The thermostat seems like an unimportant part, but if yours becomes faulty, your engine starts to overheat. Maintain your ride’s performance by getting a thermostat replacement for Jeep Cherokee from your local AutoZone.

What’s the cooling temperature on a jeep 4.0L?

The Jeep 4.0L likes to run at 210*. If it won’t run properly at 210*, then you have OTHER cooling, sensor or engine problems that you need to FIX! A 180* thermostat will NOT fix your motor’s other problems! Diagnose cooling problems here

The fresh air/recirculate blend air door seems to have broken up in the air duct causing it to suck up against the blower intake and stop all the air flow.

Why does my Jeep Cherokee air conditioner not work?

However, over years of use, many Jeep Cherokee air conditioning systems begin to work less effectively, making summer drives very hot and uncomfortable. Before repairing this problem, assess what is causing it by troubleshooting the system to see why the ice-cold air that was once blowing out of the air vents is now warm.

Can a Jeep Cherokee defrost with no vacuum?

The selector defaults to defrost with no vacuum. I would check the vacuum first. The selector defaults to defrost with no vacuum. Click to expand…

Can a Jeep Grand Cherokee have an air conditioner?

It is entirely possible for your Grand Cherokee’s heater to work just fine even when the air conditioner is not blowing cold at all. That’s why troubleshooting the air conditioner is totally different than troubleshooting the heater.

Why is the AC blowing hot air in my Jeep?

88 is the digits test. 14 is recirculation motor not responding and 54 left temp door travel too large. I would first reset the faults by disconnecting the negative battery lead and see if the faults come back. The 14 seems to be the motor itself.

What happens when the thermostat is stuck open on a Jeep Cherokee?

When the thermostat is stuck open, the vehicle will be getting too much coolant. On the other hand, if it is stuck in the closed position, the radiator will not be getting any coolant at all.

What kind of thermostat do you use on a Jeep Cherokee?

Let’s go off of the assumption that all fans are properly shrouded and in good, working condition and the systems are full of a 50/50 mix of antifreeze and water and all air has been purged from the systems. Lets hear it!! I use a Mr Gasket 180F and have had no problems.

How much does it cost to replace a Jeep Cherokee heater?

The average cost for a Jeep Cherokee heater core replacement is between $759 and $874. Labor costs are estimated between $434 and $549 while parts are priced at $325. Estimate does not include taxes and fees.

Where does the coolant go in a heater?

Hot engine coolant circulates through the heater core. When the driver turns on the heat, the blower motor blows air across the heater core and into the cabin. What are the symptoms related to a bad heater core?

Where is the heater core on a car?

The heater core looks like a very small radiator, and functions just the same. It’s mounted under the dashboard, and it provides the heat needed for the blower motor to warm the cabin. How does the heater core work? Hot engine coolant circulates through the heater core.

Where is the heater core on a Chevy Equinox?

The heater core looks like a very small radiator, and functions just the same. It’s mounted under the dashboard, and it provides the heat needed for the blower motor to warm the cabin.

How does the cooling fan work on a Jeep Grand Cherokee?

The cooling fan in a Jeep Grand Cherokee keeps engine temperatures at the correct level by kicking on during times when the engine reaches higher-than-average temperatures. Without it, the engine can reach dangerous temperatures and damage engine components.

How does the cooling fan work on a Jeep Cherokee?

Jeep Cherokee Electric Cooling Fan Diagnosis & Repair. When the air-conditioning is used the engine ECU grounds the A/C relay coil allowing current to flow through it. This activates the A/C relay which then supplies current to the A/C clutch, fan diode assembly and cooling fan relay.

What to do if your AC is blowing hot air?

Never had an AC issue on any vehicle. I did my ac refrigerant last year because of issues like you state. I went to Walmart and got a big can of refrigerant that has the hose and gauge with it. Plug it into your ac port and see where the gauge is at, add some refrigerant until it says its full.

What to do if cooling fan does not work?

If fan motor does NOT operate, check continuity between terminal 4 of the relay connector (Fig. 43) and body ground connections on the fender panel back from the relay connector (Fig. 42). If continuity exists replace the fan motor.

Why is my Jeep heater cold when idle?

The heat is abnormally cold while idle, but will pickup after accelleration. Heater core replaced last 2,000 miles.147k on the clock. …less than 100 miles and is still the problem. ??? Check the heater hoses in the engine bay for any kinks or sharp bends, this would restrict the liquid flow. KYB Gas-a-Just shocks / Transgo reprogramming shiftkit.

Navigation