Temperature Gauge Always On Cold

Reasons the Temperature Gauge Reads High

If the temperature gauge reads high, it could mean your engine is overheating. Another reason your reading might be high is you could be losing coolant. A small leak or evaporation may cause your radiator to slowly lose coolant. A third reason your temperature gauge reads high could be because the thermostat is broken. If this is the case, you may need a coolant temperature switch replacement. The last reason the temperature gauge could read high is because of a water pump, or water pump gasket failure. If the water pump is malfunctioning, it may need to be replaced by a professional.

What to Do If Your Temperature Gauge is High

If your temperature gauge is reading high, it means your car is overheating. This is a very serious matter and you should never drive an overheating car. If your car starts to overheat, shut off the air conditioner and open the windows immediately. If this does not reduce the overheating, turn on the heater as high as it can go. If this still doesn't work, pull over on the side of the road, turn off the engine, open the hood carefully, and wait until the vehicle cools down. Never open the radiator cap while the engine is hot - coolant can spray and burn you. Once the vehicle has cooled, take the car to a mechanic right away so they can diagnose the problem. Cars are especially susceptible to overheating in hot climates, like what's common in cities like Los Angeles, Phoenix, Las Vegas, or Atlanta.
The temperature gauge is an important tool in your vehicle that shows the temperature of your engine's coolant. Contact YourMechanic and have your car inspected for overheating if it reads too high, as this can cause serious problems...

Reasons the Temperature Gauge Reads Cold

On most vehicles, the temperature gauge reads cold until the engine has run for a few minutes. If the temperature gauge still reads cold after the engine has warmed up, the gauge may simply be broken. Another reason the temperature gauge could read cold is if the thermostat in the vehicle stays open. With the thermostat stuck open, the engine can be overcooled, causing a low temperature reading. If this is the case, the thermostat may need to be replaced.

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Maybe it is running higher than it should. Best guess would be to change the temperature switch for the engine controls and possibly the thermostat. Your engine has a "cold start sequence" and it will increase RPM and enrich the fuel to allow the engine to run better when cold starting.

The problem is the loss of signal after the engine warms up. If the water temp gauge seems normal, likely the temperature sensor is causing your problem. There can be 2 temperature sensors on your truck, one works the dash gauge and the other works the engine controls.

For temperature gauge remain at cold problem,click the link below :---http://technoanswers.blogspot.in/2012/02/temperature-gauge-stays-at-cold-on.html
---------Thanks.

If it is that low it is running too cold. Typical Operating temperature is 180 to 212 degree. Check your thermostat. If it's not boiling over or your temperature gauge is between the Hot and Cold marks on the dash indicator, close to the center between the two, then your engine is fine.

you are ok,it is ok.adrian,,,,,,

When you said you replaced everything, did that include the temperature sending unit?
The temperature sensor just operates the cooling fan or fans for the radiator.
The temperature sending unit operates the temperature gauge in the dashboard. If that thing is faulty, the gauge won't work right.
If you did change the sending unit, it could be possible that the computor is screwing it up, but in my 41 years as a mechanic I never heard of it, when a computor goes, nothing works.

If temp. guage never rises...most likely the radiator thermostat is stuck in the open position, therefore always running coolant thru the motor. Kills your gas mileage, because the engine is always running cold. And you won't get much heat when you turn the heater on. If this is so, have the thermostat changed.

have you checked the coolant level, make sure its full, and the other thing to look at would be the thermostat, it may be stuck open,

Yes, it will be okay.
It's much better to go without than to use a stuck thermostat.
The only thing you will notice is the engine's temperature will take much longer to warm up, thus you will not have a functioning heater like you are used to.