Question about 2006 Chevrolet Silverado 1500 2WD

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The message "engine hot a/c air conditioning turned off" is displayed, I replaced the thermostat, how do I turn off display so the cluched cooling fans turn off.

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The display reads only fault messages. The thermostat has nothing to do with a perceived engine temperature, so it will not change anything. There is a seperate temperature sensor for the gauge and the computer to moniter, and it's on the driver's side cylinder head, next to the spark plugs and exhaust manifold. If you have a cooling fan with a clutch that is driven off of the accessory belt system, then it will only turn off when the fan clutch itsself reaches a certain temperature. So in order to turn off the message, you have to figure out why the temperature sensor is telling the computer that your engine is hot.

Posted on Nov 14, 2009

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Hello... I got problem with my honda odyssey. For the past 3 days, if i start the engine, after 5 min the temperature will goes up to HOT and engine indicator light-up. I turn-off the engine and then start...


Your English is very good.

From what you have described, which is a rapid over heating of the radiator coolant fluid and therefore a hot engine condition, it would appear that the thermostat in the engine's cooling system is faulty.

If the thermostat is sticking in the closed or nearly closed position temporarily, there will be no flow or very little coolant flow between the engine and the radiator and the engine will overheat.

You have advised that after the engine is shut off , and radiator coolant fluid has cooled, you re-start the engine and drive the car without the overheating condition occurring again and the radiator coolant temperature is normal. This time there is no overheating because the thermostat is working normally.

You should have the thermostat replaced as soon as possible because allowing the engine to overheat can cause very expensive engine damage.

If you had a continuing overheating condition then I would suspect both the thermostat and the water pump. However as the overheating seems to be only temporary, and clears itself after you have shut down the engine and re-started it 10 minutes later (without further overheating arising) then I think you only have a faulty thermostat.

Please also check that the electric fans which draw air through the radiator are operating. These run on a temperature sensor and will switch on automatically once the radiator coolant fluid reaches a certain temperature and then switch off again when the fluid temperature reduces. You will hear them running once they start up. If these fans are not working the radiator coolant can quickly overheat in various driving and temperature conditions because there will be insufficient air flow through the radiator to cool the fluid. If the temperature sensor is faulty or has died, or if the electric motors running the fans are faulty, the fans will not operate.

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