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Beta Marine Repower Solutions -> Beta Marine Engines -> Our Beta 38 temperature Guage stopped working
Post Info TOPIC: Our Beta 38 temperature Guage stopped working
Chip


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Our Beta 38 temperature Guage stopped working
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Our Beta 38 temperature Guage stopped working. 

 We removed the wire from the sensor and grounded it to the block.

We have tried grounding the wire from the sensor to the block, the Guage jumped up to100 so it seems the guage is working. 

 We removed the plug on the back of the Guage and reconnected it on the electrical panel. 

 We started the motor and ran it for over 10 min and the Guage did not move. We felt the expansion tank and the antifreeze was hot. So that seems to me to say the thermostat is working and the antifreeze is moving.

 There is a but connector coming out of the tubing by the the sensor that has no wire on the other end. However there is only one wire connected to the sensor with no broken of connector so I think maybe it was not used?

Any help would be apricated.

Couldn't be the sensor? 

Thanks,

s/v Elegant'sea Chip & Debbie



-- Edited by Chip on Thursday 20th of March 2025 01:59:40 PM

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Chip


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We think it is the Guage. We talked to Beta and we tested the Guage and now the Guage does not move at all grounding out the sensor wire and it should peg.So it seems our Guage is bad.

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kb5


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I can see this is a while ago - but am keen to know the result.

Usually there are three parts to these kind of temperature display system.

1) Voltage regulator - this ensures the reading stays the same as the battery voltage varies. I've seen 9volt and 5volts used for this. The Regulator may be part of the gauge.
2) Temperature sensor - this is a variable resistor. Changing resistance with temperature,.
3) Temperature gauge (display). This measures the current flowing in the circuit (controlled by regulator and variable resistor temperature sensor). This part may also include the regulator.

In your example, the gauge moved when the wire was removed from the (one wire) sensor, and instead attached to ground. As this resulted in the gauge going to maximum temperature - it would really suggest a temperature sensor. But engine earths and cabling should be fully checked.

Later, the gauge did not move when the sensor wire was attached to ground. This suggests the gauge and/or the regulator. Do you know if the regulator in an integral part of the gauge?

Was your problem fixed by changing the gauge?

Many thanks

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