Re: A/C fan speed

Arno Luijten

Not much help but if the fan keeps running at max speed it’s typically a semiconductor (MOS-FET, Power transistor, etc.) that has given up and acts like a full conductor. You could try to trace the circuit for the fan to see if you see a big transistor-like component. Often it will be attached to some cooling body.  Make sure the unit has no power.
Now you can measure across the connection points of the component. If you see zero ohm resistance across some of the points the component is suspect and has to be desoldered. Again measure the resistance across the contacts. If it again measures (close to) zero ohm chances are you found the problem. 
I have not seen a proper schematic diagram for the Climma units.


Arno Luijten
SV Luna,

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