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

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Have a 200 watt low voltage system. currently using 140 watts. tied in one more 10 watt lamp, and transformer shut down, flashed E indicating a problem. Pulled new lamp off system and lights came back on. Have I reached the limit of the transformer?

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  • Malibu Master
  • 5,245 Answers

Yes possibly:
Did you unplug transformer before adding light.
Does wire size match distance and gauge requirements?

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Posted on Oct 23, 2013


6 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: I just bought a new Malibu Landscape Lighting 200

working with those outdoors transformer I have ran into couple would short the unit out by installing it wrong or exposing to lots of waters/moister. Again, it could also be a factory fault unit, some products will only last only few days before it blow out. It happen and most of those unit have 5 years warranty on them. I would take it back and get another and if it happens again than you may not installing it correctly or installing too close exposing to lots of moister and may short the unit out. I don't recommend trying to fix it still having warranty on them, get a replacement and start over. good luck and i hope that help some

Posted on Jul 10, 2009

  • 565 Answers

SOURCE: Replacement of on/off trippers for intermatic low voltage timers

These should work:

Posted on Jan 02, 2010

  • 1 Answer

SOURCE: Malibu 300-Watt Low Voltage Transformer ML300RTW Not Functioning

My power went off at my house. After it came by on how do I reset the transformer to come on automatically?

Posted on Jul 05, 2010

SOURCE: My Malibu 200 Watt Power

There is no fuse and no repair parts

I've been all over the 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
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

SOURCE: Why is my malibu 200

Tripper might be worn down and not pushing switch.
Switch might be broken or worn down.
Improvise by setting timer to override and plug power into cheap plug-in timer.

For information on Intermatic/Malibu power packs showing troubleshoot steps, replacement trippers, useful links, warranties and tips:

Posted on Mar 21, 2011

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This is more than likely what has happened . I am going to guess that your original low voltage trasformer was a 120 volt .6KW. Or 600watt transformer that has one lead from it to the lights . The newer less expensive transformer is also 600 watts , but the new one may have 2 sets of wire terminals on the back( 4 screws ). If this is the case , you have a transformer that is 600 watts output but it has 2 seperate 300 watt outputs that won't run 600 watts from 1 set of output screws . You will have to seperate the lighting load and may have to run an additional low voltage wire to half of your lights . In other words . Put 300 watts of light on 1 set of 12volt output screws and 300 watts on the other se of output screws .that will solve your issue . Good luck and enjoy your lights again . John

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