Question about Malibu Intermatic Inc. ML121RT Low Voltage 121-Watt Power Pack with Timer

1 Answer

Sir: I inherited an Intermatic Malibu ML44P transformer and outside lights when I purchased my present home. They have worked fine until now. The lights used to go on and off -- apparently via an electric eye in the transformer. I see no way of opening the black box to inspect timers or clean the lens on the electric eye. I have never been able to set a timer on this transformer because there is no casual way of opening the transformer to access/inspect what goes on inside. Thanks for any suggestions.

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  • Malibu Master
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Posted on Jan 02, 2017

jeltey
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SOURCE: Malibu landscape transformer

If it is keeping time try moving the stops. If it is not keeping time the motor is probably burned out. These transformers don't have a lot of serviceable parts to them.

Posted on Dec 04, 2008

protek480
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SOURCE: How do you set the timer on Malibu 300 watt

Make sure there is power to the plug. Then set the clock and install the on and off pins to control the lights. The on/off switch is for manually turning on the lights. The clock should run as soon as it's plugged in.

Posted on Jul 02, 2009

gotgeek2
  • 565 Answers

SOURCE: Malibu 600 watt transformer timer not working.

The timer motor is probably bad. Unfortunately, Malibu transformers have very few user servicable parts :-( , and the timer motor isn't one of them. One cannot even access the internal connections. If you recently purchased the transformer, return it to the store. If the transformer is less than 5 years old, it's still under warranty. In that case visit the Malibu website for instuctions.

Posted on Nov 02, 2009

Testimonial: "Thanks, very helpful info."

  • 760 Answers

SOURCE: Lost black pin for ML600TW Malibu low voltage transformer

You can go to the Intermatic web site;
http://www.intermatic.com/
Click on customer service and then the tripper order form
or try this direct link to the form:
http://www.intermatic.com/~/media/Files/Intermatic/Other/866%20tripperorderform_6%2014%202010.ashx They're only about 10cents each so buy pleanty.

Posted on Jul 12, 2010

SOURCE: My Malibu 200 Watt Power

There is no fuse and no repair parts

I've been all over the Malibulights.com website looking for anything that might help the large number of people with Malibu questions. The website has very little information and no parts and the site offers no help except the following:

1) Malibu gets the customer money, and other people troubleshoot for their customers
2) When buying a power pack, the total bulb wattage on the line has to match the power pack wattage
10 - 20 watt bulbs = 200 Watt power pack
15 -20 watt bulbs = 300 Watt power pack
http://www.malibulights.com/guides_support/low_voltage_planning_guide/select_your_power_pack.aspx
If your power pack is oversized, it will burn out the bulbs and burn out the power pack

3) A power pack makes a humming noise when it has power >>> check your power source if power pack won't work >>> no other troubleshooting is offered
4) Replace burned out bulbs ASAP or the power pack burns out the other bulbs
5) Unplug power pack when working on bulbs [otherwise, the power pack burns out which is why people write fixya asking why their power pack won't work after replacing all their bulbs]
6) Nowhere on the Malibu site does it offer-or-explain burned out power packs or power packs that don't work, but they show plenty of new products for you to buy.

Posted on Oct 19, 2010

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1 Answer

Malibu transformer ml44p doesn't turn off


Check if trippers are worn.
Check if dial rotates and keeps good time.
Plug transformer into cheap wall timer.

Copy following link for trippers, 5-year warranty info, tips to make power pack last longer, and other troubleshoot resources:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

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Copy following link for Intermatic / Malibu low voltage transformers manuals:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
Copy following link for Low voltage Intermatic pool transformers:
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#pool-lights

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I have a Malibu 300 watt ML300rtw transformer for outside lighting. The timer stopped moving and when I took it apart the small plastic gear was worn down and it was not turning the timer. Is there...


I don't know any site selling power pack gears.
Maybe ebay has gears or sells used power pack.

Easiest thing might be buy cheap plug-in timer, set power pack to override, and plug power pack into cheap timer.

Intermatic does not sell the timer module separately, or the gears.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Aug 13, 2011 | Intermatic Malibu 300W Power Pack...

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I bought a Malibu 300W low voltage landscape transformer to replace a 200W unit that stopped working. It worked for 1 week, then stopped .. the reset **** doen't work. The LED works, I do see a...


I don't know if it burned out, but something is not right.
Malibu products come with 1-5 year warranty.
New product that stopped working should be exchanged for full replacement at place of purchase, except possibly the auction sites.
New Malibu product should work for many years.
Be sure to match bulb voltage with transformer voltage to avoid possible problems.
Mismatched bulb and transformer wattage should not affect a timer in short period such as 1 week.
Another thing to check is outlet polarity. Use circuit analyzer from home center to check outlet.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Jul 20, 2011 | Intermatic Malibu 300W Power Pack...

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I have a ML300RTW Malibu transformer (S/N ML300RTW) that I bought 7/31/08. I'm pulling 170 watts from that transformer. I purchased new trippers from Northern Lights Electrical Supply. I have replaced...


You can buy cheap plug-in timer, set power pack to override and then plug power pack into cheap timer.
Otherwise there are no repair parts for power packs other than on-off trippers.
Power packs come with 5 year limited warranty, so you are within warranty period. Good job saving the date of purchase, you outshine with that detail.

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 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.

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Lost black pin for ML600TW Malibu low voltage transformer


You can go to the Intermatic web site;
http://www.intermatic.com/
Click on customer service and then the tripper order form
or try this direct link to the form:
http://www.intermatic.com/~/media/Files/Intermatic/Other/866%20tripperorderform_6%2014%202010.ashx They're only about 10cents each so buy pleanty.

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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.

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