General Electric GE Push Button Digital In-Wall Countdown Timer

Was a breeze to setup, still working a year later and looks great. I always trust GE to make a good product.

Installed in a bathroom to run the exhaust fan. This was wired correctly per instructions, but the timer wouldn't shut off after one minute, the fan ran forever, and buttons on the timer did nothing. The problem was solved by my electrician: instead of the power going from the switch to the fan, the power was going from the fan to the switch. Line/Load/Ground in the switch box appeared correct, but they weren't: what showed as the hot line was really the neutral return from the fan. This meant that when the 15318 was installed and turned on, there wasn't enough power being returned to the switch for it to charge the capacitor, activate the timer, and shut off the fan. If you have a similar problem in an older house where the switch doesn't turn off after one minute, check this: if a multimeter shows 120v from line to ground with the switch off, but nothing or near nothing with the fan running, then your fan (or other item) was probably wired wrong, and an electrician or a good handyman needs to change the splicing so hot goes to the switch first, not the fan. After that was sorted out the timer worked great.

Al principio me preocupo por que no funcionaba pero realmente fue mi culpa en la instalación, pero funciona excelenre,muy útil.

Muy bueno sólo mencionar que la conección a tierra funciona mejor al neutro, es mas estable.

This thing works just perfectly for this old house with no neutral wire. I'm using it to control a bathroom vent fan. Here are some things to know: 1) You do need to connect this exactly as the instructions say even when you have two black wires that aren't labeled properly as to which one is hot and which one leads to the load (light, fan, etc.) 2) The earth ground is required for operation and not just for safety! if you don't see a green wire, look for a naked copper wire which is probably connected to the wall box. You can attach the green wire either directly to the naked wire or screw the green wire to the wall box if the naked wire is screwed to it. 3) if you have two black wires, and don't know which one leads to the load, just try to guess based on where the wires are coming into the box. If you know the path through the walls to the load device then that will help. If you guess wrong, the switch won't work properly. In this case just shut off the circuit break and swap the black wires. After that it should work. 4) When you restore power, the switch might start up in the "on" state and your load (fan, light) might be running. Just wait a minute or less and it will shut off as soon as the capacitor in the switch charges up. Then wait a few more minutes and the switch should be working as expected. I think the switch probably uses a design like US Patent US5903139A. This charges a capacitor, not a battery, so should have a decently long lifetime. If you do have a neutral wire in your house (2 phase AC power) like most modern houses, then you're probably better off with a design that makes use of the neutral wire and the 2nd electrical phase to power itself. That will avoid the start up delay.