Temp gauge or thermostat

1991tegra

Da9 apprentice
hey everyone so my car has a problem (lol not surprised). The temperature gauge reads c even after 20+ min driving but it will start blowing hot air after 5m idle. I don't know if this is a thermostat problem or temp gauge /////// on a side-note ive had the car for 1 year and have never once seen or heard the rad fan as if it doesn't work? Thanks to anyone who can help.
 

Muckman

Not a M0derator
You can easily test the thermostat by boiling it in water to see when it opens. Of course if you go through that trouble you might as well replace it while its outs.
 

g6qwerty

Member
I had my wire to the temp gauge brake off at the end of the connector to the temp sensor at the engine block.
 
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