Question about Malibu Intermatic 121W Power Pack Transformer ML121RT

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Warning Malibu ML121RT Caught on fire and caused $10.000 worth of damage to my garage.

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Anything electrical can catch fire.
It seems odd that 120VoltAC-to-12VoltDC coil transformer sealed inside heat-resistant plastic case without source of air can independently burst into flame.
It would seem more likely that power packs have non-replaceable internal heat fuse that burns out, which explains why power packs stop working. Or that overheating and shorted coil would trip the circuit breaker before melting out of plastic case and igniting a fire.
But electricity does strange things.

Power packs come with 5-year limited warranty.
Certainly Malibu and Intermatic would be interested in your story and will want the insurance and fire reports, and would want to examine the power pack to check if quality control matches product being shipped:
Open following link for contact information and warranty information for Malibu and Intermatic.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Posted on Mar 25, 2011

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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...

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Caught fire


This really is not worth repairing. You may fix one problem but then another will crop up. Any fire,even a small one, will have damaged the wiring. It,s better and safer to buy another one. Hope this helps. Good luck.

May 19, 2009 | Maytag Neptune MCE8000AY Electric Dryer

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...

2 Answers

Malibu transformer shuts down early


Well, you're overloading the transformer by 30 watts. It's doing what it's supposed to do when overloaded...shut down. It's the _other_ (works fine) transformer that you should worry about possibly starting a fire, since it's not shutting down when overloaded.

Mar 09, 2009 | Intermatic Malibu 121W Power Pack...

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