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Classic Cooper Temperature Gauge Issue

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#1 Tom Cooper

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Posted 14 May 2020 - 06:18 PM

Cannot get my temp gauge to move past the "c" cold setting. I have changed the sender unit, and tried grounding the lead on the sender which caused the needle to flip straight to "H". Has anyone had this problem ? Would a faulty or open thermostat
Be an issue ? Hav'nt checked that yet.

#2 RustyAutoCityE


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Posted 15 May 2020 - 07:40 AM

As you run the engine for 10 minutes or so, keep checking the radiator top hose to see if the thermostat is working correctly. If it is, the hose should stay cool as then engine warms up, then start to get hotter as the thermostat opens. If it stays cool, the thermostat may be stuck open.


Is it a new gauge?

Edited by RustyAutoCityE, 15 May 2020 - 12:52 PM.

#3 gazza82


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Posted 15 May 2020 - 10:35 AM

Does the sender match the gauge?


A multi-meter on the sender should send signals as the water heats up .. I'm sure there is something on google that explains it


Also check the sender wire is not broken or a poor connection ..

Edited by gazza82, 15 May 2020 - 10:36 AM.

#4 Cooperman


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Posted 15 May 2020 - 02:03 PM

The temp gauge on my S was so inaccurate that I fitted a capilliary-type gauge as sold by Mini Spares.
It actually gives the temp accurately in degs C. A good investment.

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