My Cherokee says it runs WAY under 210 degrees
#1
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Year: 1991
Model: Cherokee
My Cherokee says it runs WAY under 210 degrees
My 91 Cherokee says it runs under 210 degrees and the heater will not blow hot air it only blows warm air. I just replaced thermostat, tested the heater core flow, replaced the heater hoses, and checked the heater control value.
#2
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Year: 1987
Model: Cherokee
Engine: 4.0
You need to verify actual Temps with either a probe or IR thermometer first. Factory guages are notorious for being incorrect. It's also recommended by well known members to eliminate the heater control valve as they commonly fail.
#3
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Year: 1987
Model: Cherokee
Engine: 4.0L
Did you put in a 195 F thermostat? When i used a 180 F, my XJ would never warm up all the way, it would pretty much stay at 180 unless it was a long highway drive. You can always test the thermostat in hot water to make sure it is opening up when it is supposed to. I have had 3 bad thermostats and always test them now before I put them in.
#4
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Year: 1991
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Did you put in a 195 F thermostat? When i used a 180 F, my XJ would never warm up all the way, it would pretty much stay at 180 unless it was a long highway drive. You can always test the thermostat in hot water to make sure it is opening up when it is supposed to. I have had 3 bad thermostats and always test them now before I put them in.
#5
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Year: 1994
Model: Cherokee
Engine: 4.0
The heater control valve may be opening only halfway etc.
Are both heater hoses hot ?
Temp sensor may be lying to you too.
Did you have heat before, or did you do the thermostat to get heat ?
Just wonderin' ...
Are both heater hoses hot ?
Temp sensor may be lying to you too.
Did you have heat before, or did you do the thermostat to get heat ?
Just wonderin' ...
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#9
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Year: 1987
Model: Cherokee
Engine: 4.0
My weak heat was contributed to a leaking heater core. I replaced other parts when I did the core. Evap coil, blower motor and resistor.
#10
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Verify the temp of the heater hoses. I would eliminate the heater control valve as a matter of course anyway.
#12
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The top hose gets extremly hot and the bottom hose gets warm and last time I checked the top hose was just getting steam in it I believe. I changes the thermostat to get heat.
#13
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Yes I changed the thermostat because of the heater not working well and the temp gage reading low but it did not change anything. My dad and I believe it may be caused by air getting into the cooling system but we cannot figure out how.
Last edited by DakWill91; 01-21-2015 at 03:39 AM.
#14
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Year: 1991
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Right now it is around high 20s low 30s and even if it runs for a long time nothing changes. I have to have the heat coming from the window vents constantly because the heater is not warm enough to keep the windows defrosted