Question about Intermatic Inc. EJ500C Digital Wall Switch Timer - Self-Adjusting Feature

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Intermatic outdoor can't reprogram. display reads NoOp

Can't reprogram outdoor light timer display reads NoOp not sure of intermatic model

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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

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My experience is that changing the battery rarely helps. But here is what does help. The compicated but excellent answer can be found at http://www.fifengr.com/intermatic/. My answer is similar, but requires only minimal disassembly of the unit. The NoOp state happens when the motor gets stuck. To unstick the motor, all you need to do is run the motor backwards once. Then you will be able to run it fowards from then on and life will be good. To run the motor boackards, so this: 0) Remove the unit from the wall, disconnecting the AC wires, and don't electrocute yourself. 1) Remove the battery holder (but leave the battery in the holder). 2) open the unit by lifting the four white tabs in the sides of the case. 3) separate the two halves. Don't remove the circut board from the front half. (if you do, don't lose the two tiny springs that provide contact between the battery terminals and the front circut board). 4) on the main body (which you have NOT opned), there are five springs sticking up. the two on the left power the motor. Touch the battery holder contacts to the springs. The motor will turn. When you have the battery connected backwards, the motor will turn once and stop. Touch the contacts the other way around and the motor will run forwards and cycle numerous times. 5) Repeat step 4, connecting the battery backwards and forwards until you are satisfied the motor will run forwards nicely. 6) Put everything backtogether and enjoy!

Posted on Oct 05, 2012

  • 1 more comment 
  • Julie
    Julie Jan 02, 2014

    Thank you, Hank! It worked! You are my hero!

  • Julie
    Julie Jan 02, 2014

    I also discovered if the battery door isn't shut just right, it will fail a swell!

  • Hank Aug 29, 2017

    After several years of periodically applying this fix, I finally decided it was time for a new timer. I got Intermatic's current version (ST01C, for around $40) and am very pleased with it. It has a much better mechanism (a relay instead of a motor pushing the arm of a switch) and this design seems quite durable. It also uses a CR2 lithium battery instead of a AAA. I recommend this upgrade.

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1 Answer

Intermatic model hb300rcl


Intermatic has discontinued HB300RCL timer from their stock numbers:
Copy following link to see Intermatic outdoor consumer timers;
http://waterheatertimer.org/Intermatic-timers-and-manuals.html#HB300CL

Amazon carries HB300RCL timer 11-23-12:
Timer has 1 year limited warranty
There are no replacement trippers.
How to set timer:
http://waterheatertimer.org/How-to-set-timers.html

More outdoor timers:
http://waterheatertimer.org/Woods-timers-and-manuals.html#outdoor

Nov 12, 2012 | Intermatic Hardware & Accessories

2 Answers

Timer is programed & is currently in off state but my stuff is still on


Specifically which timer do you have??
1) Reset timer to Clear programming, and then reprogram being careful to avoid overlaps and conflicts that can cause timer not operate as expected.
2) Move timer to different outlet.
3) Test outlet with circuit analyzer
4) Try plugging different load into timer. For example a light bulb instead of pump.
5) Check rating plate on timer and on pump to see if they are compatible.

For example Sylvania SA-210 outdoor timer is rated for 1/4 Hp at 120Volts
http://waterheatertimer.org/Sylvania-timers-and-manuals.html

While Intermatic P1261 timer is rated for 2 Hp at 120volts
http://waterheatertimer.org/Intermatic-timers-and-manuals.html#outdoor

Jul 17, 2012 | Sylvania SA210 15 Amp Zip-Set Digital...

1 Answer

Timer display says "Lo Battery". I put two new


Intermatic timers might require reset-and-reprogram after battery replacement.
To reset, hold down on-off button and push reset button once.
Keep holding on-off button until display changes.
Release on-off button, and display should blink 12:00

Try cleaning battery carriage contacts with alcohol and make sure battery polarity is correct.

If functionality is not restored, then replace timer.
Intermatic EJ500 comes with 1 year limited warranty and is rated for incandescent light bulbs only.
http://waterheatertimer.org/Intermatic-timers-and-manuals.html

Aug 08, 2011 | Intermatic Inc. EJ500C Digital Wall Switch...

1 Answer

I get "no0p" and have re-set and reprogrammed.


noOp is fatal failure of timer. According to what others say, battery replacement will not fix problem.
I've read people taking apart timer and adding oil to the gear ?/?, but have not done this myself and cannot say it works for sure.
Intermatic timers come with industry-standard 1 year limited warranty.
Suggest replacing with timer that operates on electric current rather than battery.

Advantage of Intermatic ST01C and EJ500 is 7-day programming -or- astro dawn-dusk function -plus- easy wiring -and- single-pole or 3-way switching. Whereas timers that work on electric current need neutral wire or ground wire to operate timer clock.

For 7-day function only, GE 15071 from Home Depot. Single pole only. Not for 3-way.
http://waterheatertimer.org/GE-timers-and-manuals.html#15071

For 7-day or astro dawn-dusk, Utilitec 0192773 from Lowes. Single pole only. Not for 3-way.
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

For 7-day-astro-only plus 3-way switching, Aube T1034
http://waterheatertimer.org/Aube-timers.html

Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Apr 03, 2011 | Intermatic Inc. EJ500C Digital Wall Switch...

2 Answers

I need instructions on how to program my intermatic timer 1076311. It's a two button timer.


The Intermatic outdoor timer 1076311 is Intermatic model HB65R.
It has two buttons, TIME and MODE and a digital display.
Instructions:
1. Plug in the timer, which self-tests. If error, EE flashes.
If normal, 88 flashes for 3 seconds, then display shows C and you can proceed to set the timer.
2. Push the TIME button to set C (current time) AM hours 1-12 and PM hours 1. to 12. (Example: for 7 AM push the TIME button until the display shows "7" for 7 PM push the TIME button until the display shows "7."
3. Now push and hold down the MODE button until the display shows P for the "ON time."
4. Push the TIME button to set the hour to turn ON, from AM 1 to 12 or PM 1. to 12.(Example: if you want the power on at 7 PM repeatedly push the TIME button till the display reads 7.)
5. Push and hold down the MODE button until the display reads E for "END time" (time you want the power OFF)
6. Push the TIME button repeatedly to set the end time hour from AM 1 to 12 or PM 1. to 12. The time off will display.
7. Press the MODE button to toggle between ON and the current time.

If you unplug the timer you will have to reset the C (current time), P (ON time) and E (END or OFF time).

Dec 20, 2010 | Solar Intermatic Timer 6 Outlet Outdoor

1 Answer

The wall timer to my outside lights says "noop"


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.
http://waterheatertimer.org/ST01C-program.html#battery

Manual troubleshoot section also suggests resetting timer, and then re-programming.
Manual:
http://waterheatertimer.org/Intermatic-st01c.pdf
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
http://www.nextag.com/intermatic-st01c/products-html?nxtg=90ff0a280507-C4F7FB4C58223A3F
Page also shows Intermatic EI600 astronomic timer that comes with 5 year limited warranty

Nov 29, 2010 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

Dusk to dawn light flickers on and off sometimes says on for hour or two then 5 minutes off and on installed new bulb and checked wire connections still flickers charlie


I answer questions for free here at fixya.
I know timers and electrical devices.
If the following information does not help, add a comment and I will work on the problem further.

You posted under the Intermatic ST01C timer.
I assume this is not a new installation, so we know the wiring is correct, and your programming worked correctly in the past.
You have the timer set up for dusk to dawn.

The manual has troubleshoot section.
http://waterheatertimer.org/Intermatic-st01c.pdf

I have read the manual and tested&wired the timer and programmed the timer.

A low battery can cause this kind of problem, even if BATT is not flashing on screen.
The manual also says when encountering a problem, you can reset and then reprogram the timer.
The manuals says to check for loose wires, and defective bulb.
The timer does not work on circuits longer than 100'
The timer does not work if there are underground wires.

The symptoms you describe sound like loose wires or a light bulb.
I would check the wire nuts at the timer and at the outdoor fixture.
Change the outdoor bulbs.
As last resort, reprogram the timer.
These electronic devices go bad, and the ST01C has a 1 year warranty >>> combine the short warranty with the long troubleshooting section, I believe the product fails frequently.

Nov 02, 2010 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

Display reads noOp and cannot manually switch off light. Temperature is not cold. New battery installed. Instruction sheet says timer needs repair. How do I fix it? Thanks.


Remove the timer from the wall box. Make sure that a fresh battery is in the timer, then tap the timer against something rather gently while pressing the on/off button. I just did that with three timers I had in storage. Clean the battery contacts too. Intermatic SS8

Sep 25, 2010 | Intermatic E-Z SET DIGITAL TIMER - SS7C

1 Answer

I rfeset timer to turn on earlier - now the lights won't turn on


Randi, first thing to do is to change the battery and see if the timer will allow you to reprogram it. Sometimes these timers fail, as certain 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!

Sep 07, 2009 | Intermatic Inc. EJ500C Digital Wall Switch...

2 Answers

I have an intermatic indoor outdoor timer the mototor is working (visual check) but it stays stuck at set time will not keep time any suggestions Hi, my outdoor timer stopped working last night . reset the...


On the model that I have you set the time by pulling the dial out and turning it to the current time.  If it does not "seat" fully when you release the dial it will not engage teh timer gear.  Make sure it is seated by trying to move it slightly in both directions.  If it turns frely it is not seated.  If there is some resistance (don't force it) then it is seated and should keep correct time.  If you have moved the manual lever to the ON position and the lights still do not work you need to make sure the power to the time clock is live.  The timer motor (and the lights) will not work if the power supply is off.  If the power is on and the lights still aren't working on Manual then there is a problem beyond the time clock (broken wire, burned out bulbs, etc.).

May 28, 2009 | Intermatic & Indoor/Outdoor Rain Tight...

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