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Hi my 2000 Honda odyssey temperature gauge rises to red but shows no signs of the car overheating but while driving everything is normal but this only happens while in idle any suggestions? Need help asap

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  • Cars & Trucks Expert
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The car his not overheating and the gage show hot when the car is stop, but when the car his Rolling gage is ok.I had the problem with a Plymouth horizon.The guy had put the wrong battery with inverse pole so he connect the + ok but the ground was to short he bolt the ground from the transmission to a Mc pherson bolt when the car roll the ground is not too good by the Wheel bearing and gauge is ok,when stop ground is better gauge show hot

Posted on Apr 21, 2014

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Make sure your cooling fans come on. If overheating at idle it is likely for the fans to have failed. While driving the air rushing through the grill cools the coolant in the radiator which is probably why it's fine while driving. You shouldn't drive the car if overheating as this will cause damage to the engine. Check fan relays, fuses and fans. If you turn the A/C on the fans should come on.

Posted on Apr 20, 2014

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Posted on Jan 02, 2017

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SOURCE: 2003 Honda Civic runs hot when idling.

Check the cooling fan switch. It appears your auxiliary electric cooling fan isn't going on when at idle. and engine temp increases. While you are driving, air is being rammed thru your radiator as you cruise along, so it isn't overheating, at idle, that isn't happening, and the fan should go on as the temp goes up. When the ac is switched on, the fan is being signaled to operate due to the heavy ac load on the cooling system.

Posted on Apr 27, 2009

  • 46 Answers

SOURCE: 2000 Honda Accord - engine overheats when stopped

There are only a couple things you can check. First, I would make sure the gauge is reading properly by checking the fluid temperature manually. Newer model cars have temperature sensors that can malfunction but they will usually set your check engine light off it that is the case. Check your radiator fluid. While the engine is cold!! See if it looks dirty. Rub it between your fingers and see how viscous it feels. Make sure the radiator is full. You may just need to get your radiator flushed. A lack of flow will cause an overheating condition. When your back in motion the engine has more pressure to circulate the fluid. When the car is moving there is airflow that also aids in the cooling process as well. Other than that you have a thermostat which could be sticking and causing it to overheat. Or the water pump is bad. A flush and fill and replacing the thermostat are fairly cheap and usually a lot easier to do than replacing the water pump. Especially on a Honda. Usually you will hear a squealing noise if your water pump is going out and there is, I think it is called a weep hole on the pump itself that will start to leak when the pump is going bad.

Posted on Oct 06, 2008

SOURCE: overheating on a 2003 mitsu outlander

The dealer replaced the radiator fan controller twice- said there was a second recall.

Posted on Oct 15, 2008

bunnydawg
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SOURCE: 2000 Nissan Altima temperature gauge and heater problem

sounds like you need to replace the thermostat.

Posted on Jan 29, 2009

  • 295 Answers

SOURCE: slightly overheating while at idle and heater on low or off.

The thermostat is starting to stick .
Replace the thermostat.

Posted on Apr 18, 2009

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I have an honda oddysey 2000.. Temp gauge rises when running with Ac. Once Ac turned off, temp goes back to normal. Both fans working. No steam coming out from hood. I placed coolant in the radiator


if you are loosing coolant the problem must be addressed first. but if not I would blow out the condenser and radiator fins. bugs and debris clogging the condenser or the radiator will limit airflow.

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You will have to replace the fan sensor. If the fans are not working then the temperature will rise when stopped and cool down when running because of the air coming through he radiator.
A head gasket leak will show up by lose of water and bubbles in the radiator, with it topped up to the neck of the filler. Worst indication is water in the oil and out the exhaust.

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Classic sign of a failed thermostat; it is not opening as it should when reaching its design point of 160-180 degrees F so very little is passing through a tiny hole to the radiator, leaving it cold to the touch. If you remember the good ol' days, the temperature gauge would rise to a perdictable point and pretty much stay there regardless of ambient temps. They can fail open too; then the engine never completely warms up and the gauge then wanders and your gas mileage tanks.  
Just replaced one that didn't play fair since its failure was semi-random; sometimes it worked, sometimes not.   Your thermostat is being kind; it's stuck and this condition is crystal clear. 

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