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The thermostat is stuck at 260. How do I reset

The thermostat is stuck at 260. How do I reset it?

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You need to replace the thermostat and gasket,for some reason your engine is over heating,check to make sure fluid level is full ,and cooling fan is turning on by 212 degrees,

Posted on Dec 11, 2009


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Tempature gauge went up to 260 in red. bell was dinging inside where is the thermostate

Normal operating temp for the I6 engine is 210 degrees, so 260 is a little high. Make sure it has a coolant system pressure tool to introduce pressure into the system. You want to rule out any leaks. If no leaks, more than likely your thermostat is stuck closed. It's a PITA job, but while you're in there should replace the temperature sensor located right above the thermostat.

Mar 05, 2014 | 2005 Chevrolet TrailBlazer

1 Answer

Temp gauge up to 260!

One thing at a time.
Once the engine cooled down, how long did you run it before the engine heated up ? The thermostat could have stuck closed.
Or the water pump impeller may have failed.
Have you checked the computer for trouble codes yet ?

Feb 18, 2013 | Dodge Ram 1500 Cars & Trucks

1 Answer

My 99 surburban temp surges 210 t0 260 then goes back to 190 and blows white smoke some times is it the intake gasket

white smoke means coolant is getting into the combustion chamber of the engine which would mean your head gasket is bad. I would change your thermostat too. it doesnt sound like it is working properly. your thermostat is probably getting stuck closed and that is what is leading your temperature to get high. The high heat, or even if your truck over heats a few times, it ruins the integrity of your head gasket.

Nov 24, 2012 | 1999 Chevrolet Suburban

1 Answer

My thermostat went bad on my 1987 GMC Jimmy S15 classic. We have changed the thermostat but the gauge still reads 260 degrees. Is there a reset button?

No there are no reset buttons on any of the guages. Does it read 260 always? if so try taqpping on it lightly and if it still is stuck, replace thye guage.

Jun 11, 2011 | 1987 GMC S-15 Pickup

1 Answer

Coolent leak temp gage 260

260 is too high, find that leak, if it is indeed leaking. Temperature should read 210 for normal operation. If your coolant level is normal, replace your thermostat as it is probably stuck closed. Could also, be a faulty water pump, so if it is leaking, this may be your problem too. Anyway, some things to check.

Jan 22, 2011 | 2004 GMC Envoy

1 Answer

What tempature should my 1988 22re run

operating temp should be from 195 to 215 degrees.
colder than 195 and the fuel eccon will be low.
above 220 either there is low water flow ( plugged Radiator) or poor air flow accross radiator.
At 260 you are too hot.
a stuck closed thermostst will run hot
a stuck open thermostat will run cold at high speed (50 mph)

Jul 27, 2010 | 1992 Toyota Pickup

2 Answers

My 1999 olds cutlass is over heating the gauge goes all the way to 260 and the car shuts down what could this be

Have you checked the thermostat? Over heating will damage engine, do not drive car untill you fix over heating you will kill engine!!

Feb 02, 2010 | 1999 Oldsmobile Cutlass

1 Answer

I think my thermostat is sticking. When the truck

yeah it sounds like it is sticking,,,i know some of the GMs have aoring seal in the thermostat and over time it gets stuck inside the thermostat and causes weird issues

Oct 16, 2009 | 2004 GMC Sierra

1 Answer

Freezing no heat with temp gauge going to 260 and red light on

You didn't say what kind of car it was, but with no heat and high readings on the gauge, my guess would be your coolant level. If that isn't the problem, then try replacing the thermostat. Other possibilities would be a defective temp sensor, or a bad electric fan on the radiator.

Feb 21, 2009 | 2004 Pontiac Grand Am

1 Answer

Engine Temperature Guage on Dashboard indicates overheating

Hi and welcome to FixYa,

Offhand, your described condition indicates a sticking thermostat, that is there is considerable delay before the thermostat opens. It is also possible that there is some restriction wherein the thermostat is not opening completely when the triggering temperature has been reached. As a test and to confirm, you could try temporarily removing the thermostat and operate the engine without one; observe temperature. The side effect of this test is that it would take some time to warm-up the engine, but operationally should not cause anything untoward. Of course, care has to be exercised that the gasket would still be intact.

Good luck and thank you for using FixYa.

Feb 11, 2009 | 1998 Jeep Grand Cherokee

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