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Old 03-26-2016, 02:53 PM   #1
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Thermal Valve Conversion?

Hello everyone,
From my earlier post "low engine temp" my fan controller is more than likely my issue. I can bang it with the side of my hand, and it will go up to high speed. Turn off the engine, fire it back up, fan will be on idle, bang it with my hand, back up to high.
OMC gave me a rough estimate of 800 to change it out. Asked if the Sauer-danfoss are more reliable today? Answer was not for sure, as he has had customers come back after 3 years for the same thing.
So I am thinking of giving the Source Thermal Valve Conversion a try. If so I would appreciate your thoughts. How long since installation? Were there any obvious results after? What was the cost for install? Would you do it again?
Thanks
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Old 03-27-2016, 11:25 AM   #2
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If banging causes change than cracked solder or bad crimp on wire are possibilities.

Have you been able to do selective wiggling or tugging of wires in the connector?

Is the controller servicable meaning it is not potted in epoxy?

Suggest carefully tugging on wires at the connector or poking with a stick to see if that can make it change.

The connector wires are just crimped on pins that often have bad crimp that over time get wonky and simple soldering at the crimp fixes them without replacement.

Try checking cable then remove the controller to see if it can be serviced.

If not potted get a good magnifier or jewelers loop and inspect the solder connections and look for cracks.
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Old 03-27-2016, 01:36 PM   #3
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"Try checking cable then remove the controller to see if it can be serviced.

If not potted get a good magnifier or jewelers loop and inspect the solder connections and look for cracks."

I can tell you from experience that the controller module is a non serviceable item. The thing is completely filled with potting material and the only thing you see sticking out is the programming port. The controller is programmed like back in the old days when you would use a gizmo to program an e-prom, very low tech.

I spent some time removing all of the potting material little pieces at a time. I was able to do so without breaking any components. What I found was a very cold solder joint on one to the resistor networks. I have poste pictures on the Yahoo group CC site.
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