Question about Malibu Intermatic Inc. ML300RTW 300-Watt Power Pack with Timer and Ground S

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I just replaced a light (not bulb) in my Malibu low voltage lighting system with a new one and the new one didn't work. Now the rest of the lights past this point do not work, but the ones before this point (back to the transformer) still work. Obviously this is a cable issue, but if the cable were cut or shorted, wouldn't all of the lights go out?

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Working with the bulbs can cause other bulbs to go out.
Malibu suggests turn power pack off when replacing bulbs.
Also connections get loose and need to be re-attached.

Open following link for Intermatic/Malibu power pack resources.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

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.

Posted on May 29, 2011

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Related Questions:

1 Answer

Spotlight wiring


Copy following link for troubleshoot resources and tips to get power pack to last longer.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
The lights don't have bulbs?/ This is not clear.
Buy new bulbs.
Be sure to unplug power pack when working on lights, or power pack can fail.

Jun 30, 2013 | Malibu Hardware & Accessories

1 Answer

Malibu transformer


Unplug transformer, change bulbs with low voltage bulbs from local hardware or home center. There are two screws on back of each bulb.
Copy following link for tips to get power pack to last longer, replacement trippers, warranty, troubleshoot. etc
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
Reason for unplugging transformer: because product manual lists that as best way to change bulbs. The low voltage transformer output is 12Volts and does not carry enough power to cause you harm if you touch bare wire.
Add a comment and attach photo as needed.

May 25, 2013 | Malibu ML600TW - Low Voltage Power Pack -...

1 Answer

Malibu transformer on but lights dont work


Voltage drop because transformer is not putting out enough power as when it was new.
Or Short along the wire somewhere.
Connect new wire and 1 bulb, but do not connect to existing wire.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Apr 14, 2013 | Hardware & Accessories

1 Answer

Malibu 8100-0300-01


Promoters should include useful information. Not just air-head fluff.
Copy following link for actual useful do-it-yourself information such as warranty, troubleshoot, operation tips, manuals.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Aug 21, 2012 | Hardware & Accessories

1 Answer

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...

1 Answer

I just replace a light (not bulb) in my Malibu low voltage lighting system. That new light did not work and now all of the rest of the lights past this point no longer work. But the lights between this...


Working with the bulbs can cause other bulbs to go out.
Malibu suggests turn power pack off when replacing bulbs.
Also connections get loose and need to be re-attached.

Open following link for Intermatic/Malibu power pack resources.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

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 29, 2011 | Malibu Intermatic Inc. ML121RT Low...

1 Answer

My 600 watt 12 volt transformer timer for out door lighting does not keep time properly. HOw do I get and install a new timer?


1) Amazon sells 600Watt power pack:
http://www.amazon.com/Malibu-8100-9600-01-Voltage-Power-Transformer/sim/B002ZRPM4A/2

2) I bought new 300Watt Malibu power pack at Home Depot about 2 months ago.
Near the lighting section.
My new power pack has electronic time clock, so no more 'slow clock.'
I think Home Depot had 600Watt.
Lowes carries different brand.

3) Manuals for power packs at Malibu lights.com
http://www.malibulights.com/customer_service/owners_manuals.aspx

4) Tips for buying and taking care of power pack:
-Match up wattage of bulbs with wattage of power pack
-15 each X 20 watt bulbs = 300 watts, so install 300Watt power pack
-Installing a 500W power pack on 300W of bulbs will burn out bulbs and power pack.
-Replace bulbs as soon as they burn out or other bulbs will burn out and power pack will burn out.
-When working on bulbs, unplug power pack or it may burn out.
http://www.malibulights.com/guides_support/low_voltage_planning_guide/select_your_power_pack

5) How to install power pack.
Before unplugging old power pack, check which bulbs are not working.
Replace bulbs using phillips screwdriver.
Unplug power pack.
Notice how wires are connected to power pack, write down terminal connections.
Some power packs have three terminals ... extra terminal is for additional photoelectric eye.
Use pliers or screwdriver to disconnect wires.
New power pack has has same terminals.
Plug in power pack.
Read instruction manual before connecting wires.
Save instruction manual because a few years that manual won't be around as products change.

Dec 03, 2010 | Malibu Intermatic Inc. ML121RT Low...

1 Answer

Is there a fuse (or similar) INSIDE a Malibu 600 TW (6.0 Amp)?


There is no fuse
There are no replacement parts for Malibu power packs

Malibulights.com has no troubleshooting steps

Here's what I learned:

Power packs are made to last many years 'in ordinary conditions' >> but they do give out.
Malibu power packs stop working and have to be replaced, they can't be fixed.
Power packs frequently stop working when people disconnect all the lights to work on the system, but they leave the power pack plugged in.
Power packs make a humming sound when ON.
Check electricity to unit to see if power pack has electricity.
Check your GFCIs in bathroom and kitchen.
Plug hair dryer into same receptacle to see if there is power.
Lights have to be replaced as soon as they burn out.
With burned out lights, the power pack will overpower and burn out other lights.
Evidently the power pack with no lights can also burn itself out.
When buying a new power pack, match bulb wattage with power pack wattage.
10 - 20 watt bulbs = 200Watt power pack.
15 - 20 watt bulbs = 300Watt power pack.

Oct 22, 2010 | Malibu ML600TW - Low Voltage Power Pack -...

1 Answer

Intermatic Inc. ML121RT Low Voltage 121-Watt Power Pack with Timer: I've had malibu lights for around 4 years,I have ...


If other lights are working the power pack is OK. Usually, as in your case, if changing the bulb doesn't work, check the connection where the light ties into the main run.

May 17, 2010 | Malibu Intermatic Inc. ML121RT Low...

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