Is there a way of testing temp sender

[ORSM4B]

Hi guys is there anyway of testing a temp sender to see if it is sending the right signal to the temp guage.....

Also do you have to change them like a thermostat when you overheat...

The temp sender is for a Nissan TB42

Cheers Chris....

Oh and whats better a factory stat or aftermarket..

[-Scott-]

Temp senders are a temperature sensitive resistor - resistance decreases as temperature increases. It's unlikely to have been damaged by an engine overheating.

A Haynes/Gregory's repair manual should give you some typical temperature/resistance values for your vehicle - different senders have different curves, so you need the values for the sender used for your make/model.

Personally, I'd take a factory supplied stat over aftermarket.

[v6hilux]

Yes, test one by removing it and get a pan of water on stove using muti-meter to test resistance

[Bumpy45]

Don't let it sit on the bottom of the pan as it will be hotter than the surrounding water and stir the water to eliminate hot spots.