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Posted on Jan 02, 2017
Les, First thing to do is to change the battery and see if the timer will allow you to reprogram it. Sometimes these timers will fail, as some models have a known history of failing fairly often.
NoOp, means non operating within the Intermatic line of electronic timers, so in order to see if the unit has failed or is just malfunctioning, due to a weak battery, remove the existing battery and install a fresh, new one.
You can remove the existing battery by flipping down the front switch panel and removing the battery tray with either your fingernail or a small flat bladed screwdriver. As your timer is showing the NoOp, you don't have to worry about losing your programmed on/off cycles, so you can take your time. Normally, if you're changing the battery, you get about 30 seconds to do this with some models of Intermatic timers, or you'll lose the settings. The newer models store the program regardless of how long it takes to change the battery.
Once you've replaced the battery, press the Reset button on the timer and allow it to refresh. If the NoOp is gone, just reprogram the timer with your on/off cycles and days and you're back in action. If the timer doesn't clear, you'll likely need to replace it, as it could be damaged and will not be able to be programmed again.
Usually, changing the battery and resetting the timer works about 60% of the time for me, as I've installed thousands of the various Intermatic timers in customer's homes over the years.
Hope you find this Very Helpful and best regards!
Posted on Sep 09, 2009
SOURCE: What is Noops meant? Intermatic
Either battery is bad or timer quit working.
ST01C takes CR2 battery, but folks post on fixya that ST01C quit working even with new battery:
Posted on Nov 13, 2010
noop means no operation.
This usually shows on older timer.
You posted under Intermatic ST01C.
Other have written to fixya with same symptoms.
CR2 battery might be bad. Replace battery.
Replace battery quickly and current time remains in memory.
Battery out of timer longer than 30 seconds, then current time and day disappear.
Programming remains inside timer forever with or without battery until timer is reset.
Others report they changed battery and timer never came back to life afterward.
Manual troubleshoot section also suggests resetting timer, and then re-programming.
To reset timer, hold down ON-OFF button and push small round reset button with paper clip.
Push reset for 3 seconds and release.
Keep holding down ON-OFF until INIT shows on display.
Release ON-OFF and wait for display to show.
If display never shows, then battery is dead or timer is bad.
ST01C comes with 1 year limited warranty.
Advantage of Intermatic battery operated timer is simple wiring, plus astronomic function (dawn-dusk).
All in-wall timers have advantages and disadvantages.
Nextag shows new ST01C sellers
Page also shows Intermatic EI600 astronomic timer that comes with 5 year limited warranty
Posted on Nov 29, 2010
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