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How to replace battery in model DT121 intermatic timer

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Posted on Jan 02, 2017

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SOURCE: My Intermatic Timer (model PB115M1) is not keeping

...may have solved this one... opened up an Intermatic Model HB31R and it seems to have the WG2030 timer motor... this model (complete timer box) cost $20 or so...

Posted on Sep 24, 2010

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SOURCE: I have digital programmable timers

DT121 Manual
http://www.intermatic.com/~/media/files/intermatic/products/instructions/timers/dt121c%20-%20english.ashx

All Intermatic manuals
http://www.intermatic.com/customer%20service/instruction%20manuals.aspx

Intermatic does not show DT11
Intermatic shows the DT121 is no longer available

If the display shows and you can set programs, then the battery is good.
Does the manual override work? This indicates whether the timer on-off switch operates.
If manual override does not work, then I discovered that timers are no longer any good

Programming:
Set present time
Then set ON time for program 1
Set OFF time for program 1
Then set ON time for program 2
Set OFF time for program 2
Most timers will not function if there is a conflict in programming > for example Program 1 says ON at 6 and OFF at 7 and Program 2 says opposite or has overlapping times
When events are set, press SET once > this will put timer in RUN mode

If manual override works, and you set programming correctly, but timer does not carry out instructions, I guess the timer is no good.

Intermatic has 24 hour timers with 2 on-off per day
http://www.intermatic.com/products/timers/consumer%20indoor%20timers/lamp%20%20appliance%20timers.aspx
Intermatic has 7-day digital timers (all digital timers today are 7 day where you select the day that each program works)
http://www.intermatic.com/products/timers/consumer%20indoor%20timers/digital%20timers.aspx

Posted on Oct 12, 2010

SOURCE: We replaced the battery for

Hi Maggie.
Intermatic no longer makes HB71 timer, and I cannot find instructions for the timer.
Intermatic website is offline on weekends starting March 2011, but I have searched the site numerous times over past year and they do not post that manual.
However I might be able to piece together steps if you add a comment and include in-focus photo of timer and buttons. Also include anything you can remember about setting the timer.
http://www.fixya.com/support/r6568559-post_photograph_fixya_questions_answers

My understanding so far is that this timer has 2 slide buttons, and several push buttons.
Typically slide button timers require both slide buttons to be in one position for setting timer, and another position for programming timer, and another position for operating timer. The complicated steps are why timer has been replaced with newer models with sleeker programming.

If you do not want to bother sending photograph, or working on the problem, then buy another outdoor timer for 20$
http://waterheatertimer.org/Woods-timers-and-manuals.html#6-24
http://www.amazon.com/Woods-59403-Heavy-Duty-Outdoor-Digital/dp/B002KS7EOK
http://www.homedepot.com/Electrical-Dimmers-Switches-Timers/h_d1/N-5yc1vZ1xg8Zbm2d/R-100685861/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053

Posted on Apr 23, 2011

  • 3287 Answers

SOURCE: I would like to replace five Intermatic wall switch timers (model WG230-6) that are not presently working.

The Intermatic E1020C timer is a 120 volt, single gang, single pole switch. This means it must ONLY be used on 120 volt circuits (to operate the internal timer motor), will fit into a standard electrical swithbox (does not require over or double sized boxes) and will replace a standard, single pole switch ie: has ONLY two terminal screws (not including the green ground terminal) and if a toggle type - has ON and OFF on the handle. The only additional requirement is that the switchbox will need hot (often black or red) & neutral (nearly always white) power in wires and hot (again, black or red) and neutral (again, nearly always white) power out (to the light or fan) wires. Many times, these devices are wired a little differently - with just 2 wires - instead of the four cited above. This is to provide power to keep the timer motor operating. The manual for this switch can be downloaded (and printed) here.

The part number of the old switch you provided does not appear to be correct. This number lends me to believe that it is for a 220-240 volt circuit. The closest I could find to an Intermatic part number was WG230-13. This part is the timer motor for replacement on a differnt style timer. It is indeed a 220 - 240 volt clock motor as I suspected. Please double check the brand and model number once more.

Lastly, if you can not find the info requested above, you should be able to replace the old timer with the new style - provided that the installation requirements cited in the first paragraph are met. Shut the power off before removing timers and switches and test with a working meter to be sure.

I hope this helps & good luck!

Posted on Nov 21, 2011

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The timer won't turn lights on either with program timer or by using on/off buttons


1) Timer is not fully identified.
Copy following link for replacing CR2 battery in the Intermatic ST01c
http://waterheatertimer.org/ST01C-program.html#battery

2) If this is not your timer, then add comment and describe timer in detail, and/or include model number and attach photo

Dec 20, 2012 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

Anyone have a problem with replacement battery for SS8 intermatic timer


Copy following link for all Intermatic timers, including new Ej600, and older SS series timers.
http://waterheatertimer.org/Intermatic-timers-and-manuals.html

Try resetting the timer. Hold down ON-OFF button and push and release reset button. Keep holding down ON-OFF until display starts flashing 12:00
Clean battery terminals.
My SS8 manual shows 1.5 volt alkaline battery but does not specify the shape or size of battery.
If the display is visible, then timer is getting power.
The low battery error might clear up after reset, but if it does not, then replace timer.
Intermatic has new EJ600 timer that has internal rechargeable battery, and does not need battery replacement. Or use ST01C or Ei600.
Remember also that timers cannot be exposed to extremes of hot or cold, or the battery can stop functioning.

May 01, 2012 | Intermatic Hardware & Accessories

2 Answers

I have several Intermatic Model DT7.It very hard to set hours and minute. I press the buttons and nothing hapens and the just start to go up through the numbers and I can't stop it.


I'm not sure what timer you have.
Programmable timers are made so you press-and-hold the button, and then display goes up through the numbers as you describe.
I test timers, and have not seen the fault you describe. 4-6% of timers arrive defective.
However you have several timers that do the same thing.
If you press the button once, then the first number shows, press button again and next number shows.

If your timer is going up through the number with one push of the button then try resetting timer.
I cannot identify your timer to know what the reset steps are.

Also, many timers you push the + button to go up through the numbers, and push the - button to go down through the numbers > try both buttons since one may be made for individual selection and other for acceleration through all numbers.
If timer operates on 120V, perform circuit analyzer test on the circuit to eliminate electrical as source of problem.
If this is a hard-wire timer, carefully review of wiring.

If you find the specific source of problem, add a comment.

Securitron makes DT7 programmable timer
To see image and identify timer:
http://absupply.net/securitron-dt-7-prime-time-digital-timer-6071.aspx
On-line manual shows on page

Intermatic shows DT300 series has been discontinued by Intermatic:
This timer also sold as Woods 59203 and GE 15091
To see image of timer:
http://waterheatertimer.org/Woods-timers-and-manuals.html#59203

Intermatic shows DT17 timer:
http://www.intermatic.com/~/media/files/intermatic/products/instructions/timers/dt17c%20-%20english.ashx
DT27
http://www.intermatic.com/~/media/files/intermatic/products/instructions/timers/dt27c%20-%20self%20adjusting%20-%20english.ashx
DT121

Dec 17, 2010 | Intermatic Inc. ST01C Digital In-Wall...

2 Answers

I want to replace the cr2 battery.Where is the battery compartment for the Intermatic model ST01 self adjusting wall switch timer?


The battery compartment is located behind the pull-down door
Pry open the door with small screwdriver of fingernail file

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

If the battery goes dead on the Intermatic ST01C or EJ500, the screen will not display.
When replacing battery, wipe clean all the terminal points for battery and battery carriage

If the new battery does not restore the screen, then the timers needs replacement.
http://www.aplussupply.com/intermatic/timer.htm

Nov 03, 2010 | Electrical Supplies

1 Answer

I have digital programmable timers (Model DT121 and Model DT11) that will accept programs, but won't turn the attached lamps on and off at the programed times. The batterys are new and I've had them...


DT121 Manual
http://www.intermatic.com/~/media/files/intermatic/products/instructions/timers/dt121c%20-%20english.ashx

All Intermatic manuals
http://www.intermatic.com/customer%20service/instruction%20manuals.aspx

Intermatic does not show DT11
Intermatic shows the DT121 is no longer available

If the display shows and you can set programs, then the battery is good.
Does the manual override work? This indicates whether the timer on-off switch operates.
If manual override does not work, then I discovered that timers are no longer any good

Programming:
Set present time
Then set ON time for program 1
Set OFF time for program 1
Then set ON time for program 2
Set OFF time for program 2
Most timers will not function if there is a conflict in programming > for example Program 1 says ON at 6 and OFF at 7 and Program 2 says opposite or has overlapping times
When events are set, press SET once > this will put timer in RUN mode

If manual override works, and you set programming correctly, but timer does not carry out instructions, I guess the timer is no good.

Intermatic has 24 hour timers with 2 on-off per day
http://www.intermatic.com/products/timers/consumer%20indoor%20timers/lamp%20%20appliance%20timers.aspx
Intermatic has 7-day digital timers (all digital timers today are 7 day where you select the day that each program works)
http://www.intermatic.com/products/timers/consumer%20indoor%20timers/digital%20timers.aspx

Oct 12, 2010 | Intermatic Hardware & Accessories

1 Answer

Intermatic Model DT 121 "LO" after programming


That is the visual indication for a "LO" battery. You need to replace the battery very soon or the timer will cease working properly.

Typically with this model of Intermatic timer, you only have about 30-40 seconds to change out the battery before the programming is erased and you'll have to re-enter your desired on/off cycles and such.

The battery is located under the manual push faceplate, just flip it down and you can either use a small flat bladed screwdriver or your fingernail to open up the battery compartment to change out the battery.

Hope you find this Very Helpful and best regards!

Aug 25, 2009 | Hardware & Accessories

1 Answer

We have 3 Intermatic TB121C timers. 2 of them stopped working yesterday; the switch will no longer turn the lights on or off. We were not using the timer function at this time,just the switch. The display...


Yes, replacing the batery is each unit should get them working correctly again. The way these Intermatic timer switches work is that the battery actually operates the switching function to turn it OFF/ON. So once the battery goes dead, the switch won't operate properly.

You may have to reprogram your timer too, since some models lose their memory, once the battery goes dead. There are some new versions of Intermatic timers that use a semiconductor to hold the programming even in the event of a power loss or removal and replacement of the battery. (just an FYI for future reference).

Hope you find this Very Helpful and best regards!

Aug 12, 2009 | Intermatic Hardware & Accessories

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