Q: A friend tried to change three-way switches for me at the top and bottom of my steps, and now they don’t work right. Then, all of a sudden, my doorbell stopped working. A friend at work said I ...

Q. I installed a dimmer switch in my dining room and now the chandelier only works half the time. There are two switches in the room that control the light. They worked fine before I started the job.

The new FLIR DM284 multimeter combines an 18-function industrial, True RMS digital multimeter with FLIR’s infrared guided measurement technology (IGM), which quickly steers the user to the precise ...