Having trouble with your power head turning on?
A few weeks ago I was mowing your lawn in my powerhead was flashing three red lights and would not run. I took it to my stihl dealer and they said it was the temperature gauge was busted, but unfortunately, they said they have to replace the whole motor. I found no information about this problem anywhere else online. It was going to be a $275 expense to fix it with labor and motor cost included. Obviously, I did not want to pay so much so before buying a new one or fixing the current one, I decided to take it apart myself, after figuring out where the sensor was, and what resistance was needed to activate the tool we simply swapped the temperature sensor with a resistor of ten-kilohm resistor. After carefully soldering in the resistor, covering it with heat shrink to protect it, and of course, putting it back together, there is one setback. The powerhead always thinks it’s at optimal operational temperature without actually knowing the current temperature of the motor. So the motor can overheat without the computer should I get off to save it. Luckily where I live it doesn’t get too cold or too hot so I don’t have to worry about it but if you live in hot or very cold areas, this might become a problem for you. I hope this helps if you have this problem as well.
The problem with the powerhead
Before you start taking it apart, remember not to mess with the switch assembly. I accidentally bumped it, and it all came apart. It was like putting together a Nerf gun, but more complex than that.
The black connector that I’m holding goes directly to the temperature gauge. It plugs into the white connector below my hand that goes into the motor controller.
Separate the wires from the white connector and solder in the ten-kilohm resistor.
Don’t forget to wrap it in heat shrink to protect the wires!
After putting it back together, remember if he gets unusually hot or cold give it a break because the temperature sensor will not help you anymore.
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