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My car keeps getting almost to the red in the temp gauge and the thermostat was already replaced I dont know what else to do

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Most common problem is debris build up on the radiator front, or debris build up on the AC condensor causing no or little air flow through the radiator and AC condensor. The radiator and AC condensor must have good air flow to keep everything cool, debris on the AC condensor will cause your AC temp to be high even with a proper AC charge. If there is no debris on the radiator or AC condensor and there is no white smoke coming out of the tailpipe and no loss of coolant, I would suspect a stopped up radiator on the inside or a bad water pump, good luck, Gary

Posted on Jul 27, 2010


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Is it true that when the temp gauge keep going up dangerous drive the car

Yes it is true that to drive the car with the temp gauge in the red can be dangerous. The motor will seize causing uncontrollable slide /skid at the worst possible time. It is also a total waste of money as you will be up for replacement motor . Have the problem checked out if it is not already too late.

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Can I run the van with out a thermostat long enough to go 30 miles to get one?

The short answer is yes.. it will never get to proper operating temp.. but for a forty minute drive.. it won't hurt a thing.

I assume you have completely removed the thermostat.

A faulty thermostat.. if stuck open.. same thing.. you can drive it.. Howvever if stuck closed.. you could drive it until it started to get hot.. then pull over.. wait until it cooled off.. go again.. on one that is stuck closed it all depends on outside temp.. and how fast you are driving.. (how much air is flowling across the radiator).

Keep an eye on the temp gauge or indicator lamp.. and get that thing replaced..!

Good luck!

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Dash temp guage goes to red on 2000 ford focus dohc zetech

Because you have done so many repairs already I would most likely say that the gauge is defective. I would use a manual temp probe and probe the coolant temp after the car has reached operating temp. Coolant will be between 180- 230 degrees. If coolant temp checks out and you can see coolant moving in radiator and the vehicle does not overheat then you will need either a gauge or a coolant sensor. To locate the sensor it should either be mounted in the thermostat goose neck housing or the intake manifold.

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Why does my 1994 geo prizm tend to almost overheat wih a/c on?

There are two possiblities that come to mind. Low coolant level with a very big air bubble may not permit proper cooling (too much air in the cooling system so add more liquid) or the second thing could be that the thermostat is not the proper rating for your gauge to remain below the middle level. You should try replacing the thermostat with a 180 degree thermostat (yes again and make sure orientation of the thermostat is correct... not upside down) and if the NEW thermostat is "good" it will stay near the middle regardless of whether the AC is on or not. You should also carefully check for coolant leaks or a reservoir tank crack, a loose fitting radiator cap with a worn o-ring or anything that would keep the system from being pressurized since pressure and glycol are what prevents the water from boiling in the cooling system.

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1 Answer

Engine cooling fans dont come on until temp. gauge is almost red-lined. Already changed fan controled temp. sensor.

Perhaps your gauge is faulty. Is your coolant filled up? You may also have a vapour lock causing the problem. Also you may have to change your thermostat. It may be sticking. Good luck!

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The temp gauge says the engine is hot but, in

I'm not certain if this engine has coolant bleeder valves, but if it does, make sure there aren't any pockets, particularly around the sending unit. Something is fooling the computer into thinking that things are really, really hot.

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The fans dont start til temp reaches redline on temp gauge.

Thermostat and Coolant Temp Sensor is What I Recomend Replacing on this Vehicle

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1 Answer

Temp gauge keeps going into the red

replace the thermostat
problem solved!

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