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Temperature gauge goes up and down, no over heating, new thermostat and radiator flush..95 dodge caravan

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Air is trapped in the engine most likey.Remove the coolant temp sensor located just next to the thermostat housing.Pour coolant in the radiator till no air comes out the hole and replace sensor and top off radiator.it should be full.If problem persists suspect clogged radiator or coolant fan issue.

Posted on Apr 05, 2011

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I have a 02 Grand caravan that has new radiator, termostat, one new fan. the temp gauge goes up to max hot the drops right back down in seconds. what could be the problem?


it could be you have an air lock in the cooling system
remove the rad cap from the rad, start the engine and let it run until the coolant drops (add to fill it back up) or until the coolant boils out of the rad spout.

maybe pull the heat sensor. -replace it OR clean it off, reinstall it.

Mar 12, 2015 | 2002 Dodge Grand Caravan

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2000 dodge stratus. Heater only works at idle, when driving at high speeds, heater blows cold and thermostat gauge goes to cold. Back flushed heater core, new thermostat any ideas?


I'd say you have a faulty thermostat, be it new or not. If your temperature gauge goes to cold as your engine is taking you down the highway, the thermostat is not doing its job. The temperature should never come down to below normal until engine is shut off...

Dec 03, 2013 | 2000 Dodge Stratus

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My 2009 Dodge Grand Caravan keeps over heating for no reason


Have you checked the electric fan/fans on the radiator? It may also pay to check the sender sensor which starts and stops the fan/fans.This may sound a bit silly but is the rad.cap correct pressure setting and is the pipe to the expansion tank clear?...Maybe of some help.

Dec 30, 2012 | 2009 Dodge Grand Caravan

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2001 grand caravan overheating. then suddenly cool


Change your thermostat before it sticks closed completely. Sticky thermostat is usually the cause.
Another possibility is that your radiator fan temperature switch is going bad. This is usually located next to the upper radiator hose at the gooseneck on your engine where the thermostat is located.

Mar 10, 2010 | 2001 Dodge Caravan

1 Answer

Heater in 2005 Caravan takes forever to heat and comes and goes


First thing to check is if the radiator and overflow tank are properly filled with antifreeze (with engine cool, of course) Next, is the temperature gauge moving up properly? If not, you probably need to replace the thermostat.

Jan 03, 2010 | 2005 Dodge Caravan

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2000 Dodge Caravan 3000CC engine - In summer, temp gauge in the center. Water temp is 190 degrees. In the winter, temp gauge at quarter level. It takes forever to rise. If you use the heater, the temp in...


Sounds like a stuck thermostat. The thermostat cycles open and closed in order to maintain a temperature range, some cars with very sensitive gauges reflect this opening and closing, but most cars have gauges that are somewhat less responsive in order to keep people from thinking something is wrong. I would defineately replace the thermostat and flush the cooling system, replacing the fluid with fresh.

Dec 22, 2009 | 2000 Dodge Caravan

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I have 97 dodge caravan 3.0 and i put in a brand new radiator and thermostat.Now the cooling fans dont come on and fluid is bubbling up and coming out of the reservoir. But if I unplug the temp. sensor...


Not unusual to get big airlock if heater (not defrost) isn't on during bleeding process. I usually start vehicle, top up rad 1 " or so from top,turn heater on , then watch temperature gauge & wait for fan to come on after I see flow through rad indicating thermostat opened.(Normal operating temperature)I let it do that about 3 times before I put rad cap back on, after topping rad up to about an inch or 2 from top. Then fill coolant return bottle, to proper level. It may be your problem, but if your temperature gauge goes way up past normal operating temperature, before you see flow in rad, then maybe a faulty thermostat is the cause.

Jun 11, 2009 | 1997 Dodge Caravan

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Radiator whines and overheats when not moving


Have someone flush cooling system & check condition of rad for debris in front of rad & blow or spray it out as necessary. Next time it runs hot, turn your heater temperature up high, blower fan on high, and see if gauge starts to come back down a little. If it does, my guess is your rad needs replacing, or at least consider trying a good reverse flushing of the system first, then rad.

Apr 22, 2009 | 1998 Dodge Grand Caravan

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