Air Conditioning and Coolant

Why would the temperature gauge read cold when the antifreeze is low?

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2010-12-10 16:27:04
2010-12-10 16:27:04

The temperature sender (the sensor that sends the temperature signal to the gauge) has to be immersed in coolant in order to correctly read the temperature. If the coolant is so low that it leaves the sender high and dry, the temperature shown on the gauge will not be a true reading.

if the sensor is not immersed in the coolant, there a big chance it wont read at all...

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If you are referring to the temperature reading on the gauge, then it's possibly a bad thermostat.It will also read 'cold' until the engine has sufficiently warmed up.Lack of fluid (water and/or antifreeze) in the radiator.Low engine temperature (bad thermostat).Low coolant level.Bad gauge.Wiring issue.Coolant temperature sensor bad or not correctly grounded.Problem in an electornic control module.

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at the beginning it will be cold, but it will warm up as you start driving

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yes idiot the antifreeze is to keep the water from freezing

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Check your thermostat. Looks like it is stuck open and needs replacing. That could be why your engine is running cold. Atleast its not stuck in the closed position.

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Unplug the coolant temp sensor and check what the gauge says...If it falls to cold, then the sensor is at fault. If it stays, then the gauge is either faulty or the contact points on the back of the gauges need to be cleaned... Unplug the coolant temp sensor and check what the gauge says...If it falls to cold, then the sensor is at fault. If it stays, then the gauge is either faulty or the contact points on the back of the gauges need to be cleaned...

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turn your temperature gauge down. it should be around 3 or 4 I believe.

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In the engine block of a vehicle, the part which is responsible for sending information to the temperature gauge is called the temperature gauge sending unit.

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Make sure it is full of coolant. There probably is a small leak causing the smell. Check it cold as sometimes it leaks cold but not hot.

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no, cold temperatures would not denature proteins

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Probably - your head gasket is blown. Antifreeze will be coming out of the tail (exhaust) pipe.

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normally the gauge should be in the middle.(between hot and cold) that is concider operating temp.

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Does vehicle overheat rapidly? Do you have heat? Does temperature gauge show that vehicle is running cold

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A low coolant level could cause the temp gauge not to read correctly. A faulty temp gauge sending unit could also be the cause. The coolant leak, you would have to find the source of the leak to determine the cause.

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Can be a defective temperature sending unit. If you just chance the coolant can be air trapped in the cooling system. You would need to bleed all air from the system. Can also be a defective gauge, but highly unlikely.

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heater core possibly plugged and leaking

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If you are just topping up , a 50 /50 mixture of antifreeze and preferably distilled water ( Ford states to not exceed 60 % antifreeze ) can be added to the reservoir to bring the level up to the cold mark with the engine cold

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The purpose of antifreeze in cars is to keep the engine from freezing in cold weather.


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