Question about 1995 Jeep Cherokee

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Temp Gauge and Heater

I have a 1995 Jeep Grand Cherokee Limited. The temperature gauge doesn't show the engine temperature after it's been running for a while and the heater blows luke warm air so it doesn't really warm the vehicle up. Can anyone help me out on this. The coolant was checked when I got the oil changed about a month ago and they tested it and said it was fine. I don't know if the thermostat has anything to do with this or if there is something else going on. Please advise. Thanks!!

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  • 94 Answers

It sounds like the thermosat to me have it changed and then put some Radflush through the system and leave it a week or to hen drain an refill the system cos whatever salt deposits from your area water caused the thermostat to jam, may be furring up your radiator and heating core

Posted on Nov 01, 2008

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1 Answer

Temp gauge


If the gauge were faulty, it would not be accurate. And no it would not affect the engine cooling system.
It sounds like your radiator fan is not working, or the cooling system is low on coolant. The fan should come on when the engine temp reaches 220 degrees.

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Sounds like the thermostat is open,keeping the coolant from getting up to operating temperature. Replace with a new thermostat.

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Did you replace the thermostat? If it's bad your engine could be running cold, not letting the coolant get hot enough to get proper heat AND making your temperature gauge read cold.

Dec 09, 2010 | 1994 Jeep Grand Cherokee

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The thermostat controls the temp of the engine. The temp sensor tells the gauge what temp to display. If the heater is still putting out a lot of heat then it may be a false reading temp gauge. If however the temp is noticibly cooler then replace the thermostat. A stuck open thermostat would also cause the engine to warm up slowly. check for a loose/dirty connection at the plug on the temp sensor.

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1 Answer

1995 jeep cherokee sport 4.0L. Oil gauge keeps sending false message ie. jumps from almost center past the highest point on the gauge. How do I fix this problem? where is the gauge sender located?


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If you have verified that the dash temp gauge is correct by checking temp of coolant in radiator,yes your guess would be what i would change,the engine needs to have a 195degree thermostat in it.195 degrees is what the computer is programed to see as normal running temp.

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1 Answer

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It could well be a faulty thermostat- test or replace same.
Could also be a blocked radiator core, - check coolant or airflow is not restricted,
Ensure any radiator leaks are repaired,
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Check operation of cooling fan - ensure fan runs at appropriate engine temperature - if not check sensor switch and associated relay operation.
Thermostat is located at the end of top radiator hose where it connects to engine housing.

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1 Answer

2001 Jeep Grand Cherokee Engine temg gauge not working


If you changed the coolant temperature sensor and it had a 5 volt ref signal to it then you replaced the wrong part. You need to replace the coolant temperature sending unit.  The coolant temp "sensor" is an input to the ECM for your fuel injection system. The coolant temp "sending unit" is for coolant temp reading at the gauge, It is an NTC switch (negative temperature coefficient) which means as temp increases/resistance decreases. 

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1995 Jeep Cherokee Country 4x4 - Truck continues to overheat a short while after starting. Have replaced radiator, thermostat in line, & flushed system unti it ran clear. Added new antifreeze and...


Try changing your temperature gauge (temperature switch). It's located right next to the thermostat (at least on my 1992 it is)

"The temperature switch supplies engine coolant temperature data to the MCU. Until the engine is sufficiently warmed (above 135°F/57°C), the system remains in the open loop mode of operation (i.e., a fixed air/fuel mixture based upon engine rpm)."

Aug 09, 2008 | 1995 Jeep Cherokee

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