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COOLING SYSTEM – Temperature sender

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PURPOSE
The temperature sender unit is a vital component designed to measure the water.  As the water temperature varies so does the value of the resistance inside the temperature sender thus sending a different reading to the light or gauge.

THINGS TO LOOK FOR
The temperature sender, whether it be connected to a light or gauge, must have a secure terminal attached to it fitted with a temperature warning light.  The light should appear when the ignition is turned on.  If fitted with a gauge the gauge should start on cold when the ignition is turned on and gradually move to another value to around normal position.  Again, temperature gauges and lights must be listened to and rectified if they continue to come on or climb up the needle.  If the needle climbs up high it’s time to turn the vehicle off.

IS IT EXPENSIVE TO REPAIR?
A temperature sender unit sending the value to a gauge may be costly to replace.  The temperature sender gauge type may cost $30.00-$80.00 and a temperature sender sending the value to a light may cost around $20.00-$30.00.

TEMPORARY REPAIR AND LONG TERM REPLACEMENT
It is not a good idea to disconnect a temperature sender as it will save a lot of time and money when this warning device is required to turn on or give you the correct value of the water temperature.  If in doubt, see your local auto electrician.

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