Ryobi Re600 speed control
I have a Ryobi Re600 router, a few years old, pretty much on permanent duty under my router table.
Lately, for no apparent reason the speed goes to full-throttle, and cannot be adjusted. Turn it off and usually it will work just fine when you turn it back on. The problem seems entirely random --- router may work fine for several hours, or maybe just a few minutes, before the problem re-appears.
Thinking sawdust in the variable resistor, I pulled the circuit board open, inspected it for bad solder joints, and blew it off with dry air and electronic contact cleaner, but didn't seem to affect the problem.
Anyone else had this issue? What was the problem?