warm air only from vents
01-21-2014, 01:05 PM
#1
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Model: Cherokee
warm air only from vents
2001 cherokee- water temp gage indicates 210 deg. When temperature **** set to highest heat setting only get luke warn air from vents. Just bougth jeep so don't know what previous owner did or did not do. But here in MN with temp -12 need all the heat I can get. Of course defroster effected as doesn't clear windows.
01-21-2014, 01:44 PM
#3
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Year: 2001
Model: Cherokee
Engine: 4.0
Also, depending on how many miles you jeep has and it's previous life, you may have a cracked head which is creating a milky gummy substance from oil and coolant mixing, which could be clogging up your heater core. Ask me how I know! Could be other things, but that was my experience.
01-21-2014, 02:42 PM
#5
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Year: 1998 Sport
Model: Cherokee
Engine: 4.0
Also, depending on how many miles you jeep has and it's previous life, you may have a cracked head which is creating a milky gummy substance from oil and coolant mixing, which could be clogging up your heater core. Ask me how I know! Could be other things, but that was my experience.
As Firestorm said in his earlier post check the heater hose to see if they are both the temp. With a little luck all you may have to do is give the heater core a good flushing in both directions several time. Hopefully that will take care of the lack of heat.
01-21-2014, 06:35 PM
#6
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Year: 2000
Model: Cherokee
Engine: 4.0
Just to add, also make sure the heater control valve is working properly. It can be visually inspected through the passenger foot well area behind/near the center console.
A cracked (or uncracked) head should have no bearing on your condition if 1) your engine does get up to the operating temperature, e.g., gauge reads ~210, etc., 2) your coolant reservoir is at the correct level, and 3) the coolant quality has not been compromised due to age.
A cracked (or uncracked) head should have no bearing on your condition if 1) your engine does get up to the operating temperature, e.g., gauge reads ~210, etc., 2) your coolant reservoir is at the correct level, and 3) the coolant quality has not been compromised due to age.
01-21-2014, 08:52 PM
#7
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Year: 1998 Sport
Model: Cherokee
Engine: 4.0
Just to add, also make sure the heater control valve is working properly. It can be visually inspected through the passenger foot well area behind/near the center console.
A cracked (or uncracked) head should have no bearing on your condition if 1) your engine does get up to the operating temperature, e.g., gauge reads ~210, etc., 2) your coolant reservoir is at the correct level, and 3) the coolant quality has not been compromised due to age.
A cracked (or uncracked) head should have no bearing on your condition if 1) your engine does get up to the operating temperature, e.g., gauge reads ~210, etc., 2) your coolant reservoir is at the correct level, and 3) the coolant quality has not been compromised due to age.
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01-22-2014, 07:26 AM
#9
CF Veteran
Isnt that one vacuum actuated? Or was that in older XJ's?
I'd check if heater hoses are getting hot
check coolant quality
flush the heater core (good maintenance and probably never done since only 2001)
let us know how this goes
I'd check if heater hoses are getting hot
check coolant quality
flush the heater core (good maintenance and probably never done since only 2001)
let us know how this goes
Last edited by Roler; 01-22-2014 at 07:29 AM.
01-25-2014, 04:27 PM
#14
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Model: Cherokee
warn air only from heater vents
Ah ha. Weather finally went from -18 to 32 yesterday and heat improved considerably that I had to turn down indicator **** on "red" display. I'm believing problem is as was mentioned heater core needs good back flushing. As I can not do this in sub 0 weather, mechanic I have used for big jobs on other vehicles, said he can back flush and clean for $50. I think this will be money well spent.
Oh turning temperature indictor **** from high blue to high red give significant change in temperature at vents, so I am ruling out blend door issue, unless someone can give me reason to still consider.
Oh turning temperature indictor **** from high blue to high red give significant change in temperature at vents, so I am ruling out blend door issue, unless someone can give me reason to still consider.
01-25-2014, 05:03 PM
#15
CF Veteran
I'd say your blend door appears fine.
$50 for that service...30 min of labour alone will cost you that these days...
Although its really not a pain to do, and could easily do this yourself...for $50 I'd might just treat myself and have that mech doing it in the cold...
$50 for that service...30 min of labour alone will cost you that these days...
Although its really not a pain to do, and could easily do this yourself...for $50 I'd might just treat myself and have that mech doing it in the cold...