How To Replace an Intermatic T104 Clock Motor TURN OFF THE POWER TO THE TIMER BOX. Inside the Intermatic T104 box, remove the black plastic insulator. With a flathead screwdriver, loosen the screws that hold the ground cables and power cables in place. Compress the tab at the top of the box that holds the mechanism in place. Click to see full answer. Beside this, how much does it cost to replace a pool timer? This timer is usually used to control 230V swimming pool filter pumps. It operates a single on/off cycle during a 24-hour period, which is adjustable. Purchasing an additional time tripper set will add another on/off cycle. Top Selected Products and Reviews. List Price: $22.77 You Save: $2.02 (9%) Also Know, what is the best pool timer? A pool timer is the best way to address all of those problems without adding an extra item to your already-packed to-do list. Woods Outdoor 7-Day Heavy Duty Digital Plug-in Timer. Honeywell Aube 7-Day Programmable Timer. Intermatic Heavy-Duty Outdoor Timer. GE 24-Hour Indoor/Outdoor Heavy Duty Mechanical Time Switch. Also to know, how long does a pool timer last? 20 years Is it OK to run pool pump 24 hours a day?Chemicals that you add to your pool while the water is circulating don’t need to be recirculated; they will stay mixed even if you don’t pump the water continually. Although it’s generally recommended that all the pool water undergo filtration every 24 hours, the pump does not need to run all the time.