Intermatic FD32H 2-Hour Spring-Loaded Wall Timer for Lights and Fans, Ivory - Perfect for Home, Office, and Outdoor Lighting Control

I’m not an electrician. But, I swap a switch. This one is hard to find. The numbers on the bad one by intermatic shows discontinued. This timer runs an Aldes ventilation system. Runs on low 24/7. When you get in the shower and turn the timer on, the fan in the attic stops and reverses to move more CFM. This switch has red, black, red wire with a jumper wire between two terminals. No problems.I built a timer control for my Rigid rechargeable battery charger. I destroyed two batteries by leaving them in the charger for a week. Charger is not suppose to do that but after that incident the batteries would loose charge over night and eventually died. Warrantied the lifetime batteries. So I used a 4 square electric box, a cover plate with a duplex receptacle and rectangular opening for the Intermatic FD2H, and a 6 foot 14-3 gauge cord with grounded plug. Through all this in the blender and out came my timer controlled portable ac outlets. Other than the timer all parts were scrounged from my garage. The Intermatic FD2H timer has been around for years so it should last for a long time. In the future will make a similar device using the cheaper Chinese made Woods 59013 Decora Style 8-4-2-1 Hour Electronic Timer.This timer is the perfect replacement for the old bathroom vent fan wall switch. Before showering you just give it a twist and the fan runs till it times out. The new standard time for bathroom vent fans is recommended at a minimum of 20 minutes after the shower water is turned off to help prevent mold and mildew buildup on the bathroom walls from excess moisture in the air. This timer works great for that. If you need to run the fan for other stinky business you give it a small twist. It is working out very well for us. It was easy to install (just like changing a light switch, but make sure to follow the directions that are included.)Some folks have complained that this timer stopped working soon after it was installed, and that happens to me as well. Im using it to operate an attic fan for whole house ventilation that need not stay on all night. I then realized that I have 2 switches that control the fan, one on each floor, wired in a 3 way switch pattern. The new timer is next to the 3 way switch in our bedroom.I found that if the 3 way switch downstairs was off, the timer would not work.I can't explain it better than that, but have found to timer to work properly if the 3 way switch is set properlyThis timer can control on or off time .I needed the SPDT to set up a normally on circuit. This was for a devise that runs continuously except when being serviced. The service people occasionally forget to turn the circuit back on. Now it turns itself back on. Nice!I was looking for a timer that would have a contact closure when timing out rather than opening on timing out. I wanted to shut off a water pump at the end of an interval by shorting the magneto. This worked great. Now I don't have to set a timer and then hike to the pump to shut it off.The timer was very easy to install and this was great for an ice machine to shut off during Sunday school. Hard to find this SPDT switch and I would recommend it to others. Amazon did a great job in shipping as well. First rate all the way.