Jeep Grand Cherokee Heater Not Working: Diagnosis
- Low Coolant. While not having enough coolant may make your engine run hotter, it can also cause your Grand Cherokee to not be able to create enough heat.
- Bad Thermostat. The job of your Grand Cherokee’s thermostat is to regulate the temperature of the engine. ...
- Heater Core. The heater core itself can go bad. ...
- Hose to/from the Heater Core. ...
- Water Pump. ...
Why is my heater not working on my Jeep Wrangler?
Engines in most new Jeeps aren’t designed to work alongside regular or off-brand coolant, so do be careful! Our third common reason for a heater not working is a broken thermostat. Your heater core, and sometimes even your radiator, is designed to work in accordance with a thermostat.
Why is my car heater not coming on?
At the simplest level, there are two main reasons why the heater is not working. If it’s not coming on at all, it’s usually either the blower motor or some other wiring issue. If the heat is blowing, but blowing cold, it has something to do with the coolant getting to the heater core, or the heater core itself.
Why is my car's heat blowing cold but not hot?
If the heat is blowing, but blowing cold, it has something to do with the coolant getting to the heater core, or the heater core itself. At the simplest level possible, the heater works by passing hot coolant from the engine into a tiny radiator called the heater core.
What is a heater core in a jeep?
Comparable to compact radiators, a heater core is part of the cooling system that serves as the passageway for hot coolant and is usually of brass or aluminum tubing material. Since the heater core (view on Amazon) is responsible for balancing heating actions inside your Jeep, it is crucial to keep it clog-free.
Why is my heater blowing cold air in my Jeep?
Low Coolant Level The coolant (usually a mixture of water and antifreeze) in your engine doesn't just work to keep the engine from overheating: It's also the source of heat supporting the heating system. If there isn't enough coolant in your system, the heater core will blow cold air into your car.
Why did my heat stop working in my Jeep?
The most common reasons a Jeep Wrangler heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.
How much does it cost to fix heat in a Jeep?
Jeep Wrangler Heater Core Replacement Cost Estimate. The average cost for a Jeep Wrangler heater core replacement is between $1,020 and $1,185. Labor costs are estimated between $593 and $748 while parts are priced between $427 and $437.
Why is my car blowing cold air when it's on heat?
There are a few basic issues that usually lead to the blowing of cool air from one's car heating system: There isn't enough coolant in the engine. There is a problem with your heater core. Your thermostats are not working correctly.
How do I know if I need a blower motor or a resistor?
Signs of a Bad Blower Motor Resistor Loss of HVAC fan control (total or certain speeds) The fan only works on its highest speed setting. No air coming from vents. Intermittent or inconsistent fan speed.
How do I make my Jeep heater hotter?
Try flushing the heater core using a garden hose, flush both directions a few times back and forth until it's clean. There is a possibility that a bad water pump does not have enough flow, but generally it's a clogged heater core. Your jeep should be running at 210F.
Why did my heater stop working?
Dirty and clogged filters are one of the primary causes of furnace problems and can cause high operating costs. The heat exchanger can overheat and shut off quickly when filters are clogged with dust and dirt. This also causes soot buildup on the heat exchanger, which makes your furnace run less efficiently.
Why does my car have no heat?
Low coolant: Whether caused by a leak or water evaporation, low coolant is the most common source of poor heater output. Thermostat: A stuck-open thermostat prevents the engine (and coolant) from heating up. Heater core: A clogged heater core restricts coolant flow, giving up little or no heat.
Why is my car heater not working?
A heater can stop working for a number of reasons, including: A low antifreeze/water level in the radiator due to a leak in the cooling system. A bad thermostat that isn't allowing the engine to properly warm up. A blower fan that isn't working properly.
How expensive is it to replace a heater core?
The total cost of parts and labor will range between $800 and $1,000 to have your heater core fixed by a professional. Labor costs vary, so call ahead and get a quote from multiple repair shops. If you fix the heater yourself, you'll only have to pay for the cost of a new heater core which runs between $100 and $300.
How do I know if my heater core is clogged?
Five Signs Your Car's Heater Core Is Going BadFog Inside Your Car. Two things could be going on if you have fog inside your car. ... Sweet Smells in the Car. The sweet smell in your car might not be your perfume or the donuts you're taking to work. ... Constant Engine Coolant Loss. ... Cold Air in the Cabin. ... Cold Cabin/Hot Engine.
Is there a fuse for the heater in my car?
Q: Is There a Fuse For The Heater In My Car? A: Your car's heater does indeed have a fuse. You can check to see if the heater fuse is shot by looking inside your fuse box.
How much is a car AC blower motor?
“A new car blower motor costs about $50 to $100 for the part and $80 to $100 in labor. Add it up and you're looking at a total charge of $130 to $200 for a new car blower motor.
How do you flush a heater core on a Jeep Wrangler?
0:271:542008 Jeep Wrangler JK 3.8 Heater Core Easy Flush - YouTubeYouTubeStart of suggested clipEnd of suggested clipUse a pair of pliers. Disconnect the two hoses pull them out bought this fancy hose repair couplingMoreUse a pair of pliers. Disconnect the two hoses pull them out bought this fancy hose repair coupling a little farm place for five bucks right all it is it's a water hose repair cup.
How do you replace the blower motor resistor on a 1999 Jeep Wrangler?
1:254:31How To Replace A Blower Motor Resistor In A Jeep WranglerYouTubeStart of suggested clipEnd of suggested clipNow as far as replacing the blower motor resistor in most cars it's actually quite easy it'sMoreNow as far as replacing the blower motor resistor in most cars it's actually quite easy it's generally going to be on the right side underneath. The footwell passenger footwell.
Where is the thermostat located on a 2004 Jeep Liberty?
1:477:16How To Replace Thermostat Housing 02-13 Jeep Liberty - YouTubeYouTubeStart of suggested clipEnd of suggested clipYour drain plug is located right here under the bumper. And using a 16 millimeter wrench just loosenMoreYour drain plug is located right here under the bumper. And using a 16 millimeter wrench just loosen that up and make sure you have a drip pan underneath to collect the. Cooling.
The heater core has frozen
A Jeep Heater Not Working can be caused by the heater core freezing up. This is because it has been leaking coolant, which then freezes in cold weather. The Jeep needs to have a new heater core installed and the leak repaired as soon as possible so that there is no more coolant loss on those chilly days of winter.
The thermostat is faulty
Jeepers may find that their Jeep Heater will stop functioning due to a problem with the thermostat or air conditioning switch module (ACM). When these parts go out you will see Jeep Heater not working, no heat or AC.
The bad blower motor or fan clutch assembly
Also may find that the Jeep heater doesn’t work because either the vehicle’s blower motor went out and stopped moving air through the vents in order for it to be heated up – this could also mean that your Jeep has a bad fan clutch due to excessive overheating of the engine compartment! These two things can cause Jeep Heaters not working as well as cold drafts blowing from inside your car if you’re unfortunate enough to experience both at once..
The Jeep Heater is not working due to an electrical problem with the heating control unit, wiring, or fuse box
Jeep Heater Not Working because you don’t know how to use their climate controls on their dashboard correctly – in which case Jeep owners need to just turn up the temperature until they see hot air blowing from those vents again.
The vacuum hose has come loose and needs to be reconnected
When you’re using your car’s Jeep Heater and notice Jeep Heater not working, it might be because your vacuum hose has come loose. Check the system for any leaks or cracks to see if they have a leaking vacuum line that needs repaired or replaced so that their Jeep’s heater can work properly again!
How to tell if a Jeep Wrangler heater is broken?
In a Jeep Wrangler, this part is typically located behind your glove box. Before taking everything apart to see if it’s broken, we recommend turning your heater on listening for a rattling sound. It may also sound like rubbing or gears grinding. Typically blower motorsdisplay signs of bearing issues and even fan blade issues in some cases. If you don’t hear any noises, we recommend you check the resistor (which is a part of the blower motor). Once again, no need to take anything off. All you need to do is run your heater at different levels. If it works on some levels and not others, chances are your resistor needs to be replaced. Unfortunately, there is no simple repair for this issue. All you can do is replace the broken parts, so take it to a trusted mechanic.
Why is my heater not working?
Our third common reason for a heater not working is a broken thermostat. Your heater core, and sometimes even your radiator, is designed to work in accordance with a thermostat. If this thermostat is damaged or needs calibration, you may damage your car or simply lack proper heating. Sometimes thermostats simply need recalibration, whereas in other cases they can be quite expensive to replace.
What happens if your coolant is not working?
As we mentioned earlier, if your coolant system is not working correctly, your heater core won’t either. So, if you have a damaged component in your coolant system, like a hose, odds are nothing’s going to work right. Not only will you have no heat in your vehicle, but your engine will be overheating, coolant will be leaking all over the ground, and everything will just be falling apart. In order to solve this issue, you can either replace the tubing all together or just patch it up using a Jeep patch kit. You may also want to top up your coolant (see common reason number two) to avoid issues.
How to fix a hot engine with no coolant?
All you need to do to fix this is to add more coolant. Fill it up to the appropriate level, and you’re good to go. Take your heating system for a test drive . If the problem persists, you need to check through some of our other options. If the problem no longer persists, you’re good to go. Just keep an eye on your coolant level from now on. It’s not good for an engine to run with no coolant.
Why is my wrangler not heating up?
Low Coolant. While not having enough coolant may make your engine run hotter, it can also cause your Wrangler to not be able to create enough heat. Is there isn’t enough line pressure, due to low coolant, then the heater core will not be able to get any coolant itself.
What does a bad thermostat do on a Jeep Wrangler?
Bad Thermostat. The job of your Wrangler’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. Sometimes when a thermostat goes bad, it stays stuck open.
Why is my heater not working?
If the heat is blowing, but blowing cold, it has something to do with the coolant getting to the heater core, or the heater core itself.
How does a wrangler heater work?
At the simplest level possible, the heater works by passing hot coolant from the engine into a tiny radiator called the heater core. At this point, the blower motor blows air across the it and the newly heated air blows on to the driver and passengers. If the heater has stopped working in your Wrangler, this ...
What does it mean when a heater hose is hot and cold?
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.
How to check coolant level on a car?
You can verify this by checking the coolant level by taking a peek at the overflow reservoir. The overflow reservoir will be connected to the radiator by a tube coming from the top (usually right by the radiator cap). It should have separate lines to indicate “cool hot” and “cool cold”. Some vehicles only have full hot. Never touch the radiator cap unless the vehicle is ICE COLD.
How to tell if a wrangler thermostat is bad?
If your Wrangler has a built in temperature gauge, take a look at it and see if it is in the spot it is normally in after a bit of driving. If it looks like it is colder than normal, that’s a pretty good indication that there is something wrong with the thermostat.
Why is my Grand Cherokee not running hot?
Is there isn’t enough line pressure, due to low coolant, then the heater core will not be able to get any coolant itself.
Why is my heater not working?
If the heat is blowing, but blowing cold, it has something to do with the coolant getting to the heater core, or the heater core itself.
Why does my water pump blow hot?
If you look at your temperature gauge, and the engine is running hotter than normal, but there is not heat coming from the heater you may be having issues with the water pump. Try taking the vehicle out of gear and revving the engine a little. If you feel the heat start to blow hot for a few seconds that’s an indication of a bad water pump or low coolant. Also, the serpentine belt going to the water pump going bad can it not turn as fast as it needs to.
How does a Grand Cherokee heater work?
At the simplest level possible, the heater works by passing hot coolant from the engine into a tiny radiator called the heater core. At this point, the blower motor blows air across the it and the newly heated air blows on to the driver and passengers. If the heater has stopped working in your Grand ...
What does it mean when a heater hose is hot and cold?
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.
How to check coolant level on a car?
You can verify this by checking the coolant level by taking a peek at the overflow reservoir. The overflow reservoir will be connected to the radiator by a tube coming from the top (usually right by the radiator cap). It should have separate lines to indicate “cool hot” and “cool cold”. Some vehicles only have full hot. Never touch the radiator cap unless the vehicle is ICE COLD.
What does a bad thermostat do on a Grand Cherokee?
Bad Thermostat. The job of your Grand 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. Sometimes when a thermostat goes bad, it stays stuck open.
Common Reason Number One – Blower Motor and Resistor
Common Reason Number Two – Incorrect Coolant Level
- Unlike the previous option, this problem is quite easy to fix. All you need to do is check your coolant level. It may also be labeled antifreeze. Interestingly enough, just because your engine is getting hotter, doesn’t mean your cabin will as well. If anything the interior of your vehicle will get colder. If there isn’t enough coolant, your entire coolant system won’t work properly. And remem…
Common Reason Number Three – Thermostat
- Our third common reason for a heater not working is a broken thermostat. Your heater core, and sometimes even your radiator, is designed to work in accordance with a thermostat. If this thermostat is damaged or needs calibration, you may damage your car or simply lack proper heating. Sometimes thermostats simply need recalibration, whereas in other cases they can be …
Common Reason Number Four – Hoses
- As we mentioned earlier, if your coolant system is not working correctly, your heater core won’t either. So, if you have a damaged component in your coolant system, like a hose, odds are nothing’s going to work right. Not only will you have no heat in your vehicle, but your engine will be overheating, coolant will be leaking all over the ground, and everything will just be falling apart. I…
For More Information
- For more information we recommend you visit your owner’s manual. It will tell you exactly what type of coolant your vehicle needs, the type of heater core you have, and so much more. Feel free to reach out to us at any time, for we are one of the best sources of Jeep knowledge on the entire world wide web.