Question about Intermatic Malibu 121W Power Pack Transformer ML121RT

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Timer just stopped working on my ML121RT. When I

Timer just stopped working on my ML121RT. When I turn the timer manually so the pins click it on and off, the lights come on and off. Almost like the gears in the timer don't work. Have had installed less than 6 months.

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This could be a fix or just a way to find out if its bad or not. check to see if the wheel is in the neutral position, some of them u pull out to disengage from the motor and gears so u can turn it manually. if this is the case then just put it back in gear.

if thats not the problem then i would think that the motor is burned up that is turning it. if the motor works and the wheel doesn't turn then the gears r probly stripped.

Posted on Aug 10, 2009

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Posted on Jan 02, 2017

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1 Answer

How do I set the timer with the two pins


The pin are probably trippers?
http://waterheatertimer.org/images/ML-Power-Pack-trippers-500.jpg
The trippers are red and black: black for ON and red for OFF.

Open following link for illustration of tripper install, and troubleshoot that walks through steps needed to operate and set timer, and keep timer working for many years.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Aug 10, 2011 | Intermatic Inc. ML121RT Malibu Low Voltage...

1 Answer

I moved the location my power pack timer ML121RT. It was working before now the clock is not turning. Lights will work manually so I have power through the power pack.


Open following link for troubleshooting steps and warranty information.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

As a general rule, malfunctioning power pack clock is bad news because there are no repair parts or steps to take apart and fix. There are trippers, but if timer is not rotating, then trippers are not the problem.
However, you can buy cheap plug-in timer, set power pack to override, and plug power pack into cheap timer.
Power packs come with 5-year limited warranty.

Upvote the help.
And 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.

May 10, 2011 | Malibu Intermatic Inc. ML121RT Low...

1 Answer

Where is the manual on/off switch on the malibu ML121Rt?


Intermatic site is closed this weekend.
Open following link to download ML121RT instructions.
Word search instruction sheet for 'manual'
http://www.intermatic.com/products/professional lighting/light expressions/power packs.aspx

For information on Intermatic/Malibu power packs showing links to manuals, troubleshoot steps, replacement trippers, useful links, warranties and tips:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.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 02, 2011 | Malibu Intermatic Inc. ML121RT Low...

1 Answer

Need to reset my ml121rt timer. How do i do it. don't hav the instruction manual


1) Manuals appear on following two links:
http://malibulights.com/customer_service/owners_manuals.aspx

http://www.intermatic.com/products/professional%20lighting/light%20expressions/power%20packs.aspx

http://www.intermatic.com/~/media/files/intermatic/products/instructions/professional%20lighting/ml121rt%20trilingual.ashx

2) For more information on Intermatic/Malibu power packs showing troubleshoot steps, replacement trippers, useful links, warranties and tips:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Add a comment for more free help.
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.

Mar 05, 2011 | Malibu Intermatic Inc. ML121RT Low...

1 Answer

I have a malibu ML121RT timer that just stopped working. Outlet works, new lightbulbs, didn't nick power cords to outdoor lights. What could be the problem?


The PB912M10 timer clock motor is not sold separately. Aug 2010.
If power pack transformer still works: buy cheap plug-in timer, set power pack to override, and plug power pack into cheap timer.
If transformer no longer works, then it is not repairable.
With receipt, power pack might still be under warranty.
Open following link for power pack tips and resources:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Jun 16, 2009 | Intermatic Malibu 121W Power Pack...

1 Answer

What timer motor fits in Intermatic ML121RT Power Pack ?


The PB912M10 timer clock motor is not sold separately. Aug 2010.
If power pack transformer still works: buy cheap plug-in timer, set power pack to override, and plug power pack into cheap timer.
With receipt, power pack might still be under warranty.
Open following link for power pack tips and resources:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Apr 11, 2009 | Intermatic Malibu 121W Power Pack...

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