Working on a sprinkler controller. We already know that one the field solenoids is shorted and caused the system to pull maybe about 8A where it should be drawing less than 1A. There is no fuse (smart ones) on the controller. There is a power resistor (maybe 2watts) inside the device among other things that got VERY hot. It actually cooked all the coating off and desoldered itself. Because the bands are gone, there is no chance of determining the value.
Upon testing it, it reads about .3ohms. The leads both conduct with the metal barrel or case. I have never had a resistor short so I am curious if this is a possibility or if this seems normal?
Upon testing it, it reads about .3ohms. The leads both conduct with the metal barrel or case. I have never had a resistor short so I am curious if this is a possibility or if this seems normal?