No heat in 2001 Cherokee
#32
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Location: Colorado
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Year: 1997
Model: Cherokee
Engine: 4.0L
Poconogeorge, please let us know if you solve this. I have the same problem. I flushed the heater core. It had no problem, clean. I can hear the heater door moving.
I have ran the jeep with the radiator cap off and I get the result one of the other posts said, it just dribbles over the lip of the opening. It seems like I should be able to see the thermostat open and the coolent rush through.
The engine, thermostat and water pump are new.
I am wondering about that little plastic diafram looking thing in your picture with the vacuum hoses attached to it. Is the a heater cotrol valve on these newer xj's like the older ones? Mine is a 97.
I have ran the jeep with the radiator cap off and I get the result one of the other posts said, it just dribbles over the lip of the opening. It seems like I should be able to see the thermostat open and the coolent rush through.
The engine, thermostat and water pump are new.
I am wondering about that little plastic diafram looking thing in your picture with the vacuum hoses attached to it. Is the a heater cotrol valve on these newer xj's like the older ones? Mine is a 97.
#38
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Year: 1997
Model: Cherokee
Engine: 4.0L
The top heater hose is hot. The bottom one seems not quite as hot. But like I said before I flushed the heater core and it was free flowing and clean.
#39
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Location: grass valley, ca
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Year: 2001
Model: Cherokee
Engine: 4.0
I have not solved it yet. Same as it was before. It has to be simple but I just can't figure it out yet. I work 12 hr days and don't have a garage or private yard to work in.
#40
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Year: 2000
Model: Cherokee
Engine: 4.0L
I had a lot of the same symptoms that you describe in my 00 Sport. Top heater core hose would get hot, bottom one would be warm. I flushed the heater core and changed the tstat, but it didn't make a difference. This fall I broke down and had the heater core replace, and the heat is working like a champ again.
I lived without heat last winter, but now that my daughter is driving it, it was time to fix it.
Sean
I lived without heat last winter, but now that my daughter is driving it, it was time to fix it.
Sean
#42
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Location: Chicago
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Year: 1994
Model: Cherokee
Engine: 4.0
my friends 00 was doing the same stuff last week.. he swapped the lines and after a couple days it was better.. By swapping i mean he took them both off at the firewall and changed them left to right. I'm guessing that after awhile the scale back flushed itself?
#43
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Location: Two Harbors
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Year: 1998
Model: Cherokee
Engine: 4.0L
Any one else...Is this OK to do? I too am experience low heat output. I have flushed, backfllushed, changed T-Stat, and new fluid. I live in Northern Minnesota and it's cold!!
#44
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Year: 1997
Model: Cherokee
Engine: 4.0L
Well I finally think I have it fixed. I thought I had it fixed last weekend after replaceing the 160 Degree thermo with the 195 and spending a lot of time burping it just to make sure.
After my son drove it over the week he said slight heat but not real heat.
So I bought more anti freeze and some CLR. I did the routine shown on Youtube. I didn't really expect it to make any difference since I had already flushed the heater core weeks back with the garden hose and the core was totally clean and flowed no problem.
I was shocked at the crap that came out of that core back flushing it with the air. I did that many times and then put in the CLR for a half hour. I then continued to flush and get more crap out. I flushed until nothing came out.
Refilled the radiator and overflow.
It is putting out real heat now.
After my son drove it over the week he said slight heat but not real heat.
So I bought more anti freeze and some CLR. I did the routine shown on Youtube. I didn't really expect it to make any difference since I had already flushed the heater core weeks back with the garden hose and the core was totally clean and flowed no problem.
I was shocked at the crap that came out of that core back flushing it with the air. I did that many times and then put in the CLR for a half hour. I then continued to flush and get more crap out. I flushed until nothing came out.
Refilled the radiator and overflow.
It is putting out real heat now.
#45
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Year: 1998
Model: Cherokee
Engine: 4.0L