Question about Malibu ML200RTW - Low Voltage Power Pack -200 Watt - With Timer and Ground

2 Answers

Timer worked for years. Just replaced lights. There were (8) but now there are (10). I didn't do the work and didn't know the wattage (and am not positive, but this looks like the unit). The lights work, but the timer doesn't. Its time is off, even after I reset the dial. Would too much wattage overpower that mechanism somehow? Or has the unit just gotten old, coincidentally right when this change was made? Thanks.

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The ballast inside is only rated for a predetermined quantity of lams using a set amount of wattage. To overload the system by adding lamps or increasing the wattage of the bulbs will cause a failure eventually. Also with these systems it is wise to replace bad bulbs quickly. Your problem is likely just a bad timer since the two components are isolated within the box.

Posted on Oct 09, 2010

Testimonial: "Thanks! Coincidences always make troubleshooting fun... but that seems to be the case. (Timer is currently working again, BTW... or seems to be....)"

Download manual for Malibu 200 Watt power pack

According to Malibu website information, your power pack is correct size if lights come on.
The way to figure is this
10 bulbs x 18 watts each = 180 Watts
so 200 watt power pack is good

Does the manual override work?
Rotate the on-off button counterclockwise
If override does not turn lights on-and-off, then timer has a short

Does the center dial turn when power is on?
If the dial is not turning, then power pack is kaput, or time of day is not set

Did you reset the time of day?


Timer worked for years. Just replaced lights. - 2205f7b.jpg

How to set time of day:
Put your trippers in place
Red = ON
Black = OFF
Plug in power pack
Rotate arrow (colored blue in diagram) as follows
Turn dial clockwise to present time of day (diagram shows 9 o'clock)
Turn dial one or more full revolutions, then return to present time of day

If center dial is still not rotating after setting time of day, it's time for new $50-80 power pack, unless you put a $15 timer on that plug. A cheap timer might work ... keep it going for couple more years.

Posted on Oct 08, 2010

  • 1 more comment 
  • joe6805 Oct 08, 2010

    Thanks. Now that the sun is up, I've taken a better look. I had bought (8) new 20w lights to replace old ones. They mashed one, so I bought a few extras in case they mashed more (and expected to return a couple), but they used them all, plus it turns out installed one more spotlight intended for elsewhere, so I have (11) x 20w. Obviously that's over the 200w for the unit. (And unfortunately, now I can't return a couple, if I pull a few to get the wattage back down, but I could pull a few.) However... the lights do come on, and your note seems to indicate Malibu says that means it's an adequate pack. So we have that math in play. Now, on the timer mechanism, yes, I can reset the 'clock' in the middle of the dial. I saw they hadn't come on last night, so went out with a flashlight and rotated it to be correct, and they came on. Figured someone had reset it during the day somehow, since it had been right the day before. But a few hours later, I saw they hadn't gone off, so it wasn't rotating properly still. The thing is, that seems all mechanical, and/or driven by the wall power, doesn't seem like it'd be impacted by the lights themselves, "down the line" in the chain of things. But it also seems like too big a coincidence, if this started failing shortly after they overloaded the chain. I guess I can put more good money after bad and go get a 300w unit ($119 tax) and hope that does it. Or I could pull some unreturnable lights and see what happens. Rattlesnake-and-scorpion terrain is not as easy to deal with as a lawn, so I'd just as soon leave 'em. But... if the shaft of the timer just needs some WD40 or something, a new transformer seems like a waste. So the core question might still be whether too much wattage on the chain could impact the timer (or clock) wheel... or whether it's just gone bad and timing is a coincidence. (There's definitely more than 200w on the chain, but the lights DO come on when manually overridden... but only then and only repeatedly.) Thanks for any further knowledge and logic...!

  • Anonymous Oct 09, 2010

    I think the failure is a coincidence.

    The Malibu cannot be dissembled and cleaned out or repaired.

    Important Note about the new power pack:
    Malibu instructions say to replace burned-out bulbs ASAP. It says that when a bulb is burned out, that it causes other bulbs to burn out.
    I think they are saying you should keep exactly 10 20Watt bulbs on the 200W power pack.
    So if you buy 300Watt power pack, you need 15 20Watt bulbs on the line -or- it will burn out the bulbs you have.
    That tip from the manual may save you a dollar.

    Post again when you have another problem.

  • joe6805 Oct 09, 2010

    Thanks ...!

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1 Answer

I have lights that are on an intermatic timer and they are on all the time and I can't figure out how to turn them off.


You posted under Intermatic power pack.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Question does not give enough information.

1) If timer worked correctly before and then stopped working, then open link above for full troubleshoot help, including 5-year warranty information

2) If you cannot figure out how to program new timer, then read manual, and re-post question about any part of manual that is confusing. Expert might be able to help after receiving clear description of timer or model number and what you have done so far to fix problem.

3) If you need a manual, add model number for possible link to manual.

4) If you cannot find override switch, it is located above and to left of timer dial. Rotate switch to operate override.

5) If bulbs are burned out, then unplug power pack so it won't burn out, and then replace bulbs.
Match total wattage of bulbs to power pack wattage. Replace burned out bulbs as soon as they burn out so power pack will last many years.

6) Add a photo to your question by including link to Flickr

Absolutely feel obligated to upvote the help.
Or 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 04, 2011 | Intermatic & Malibu& 300 Watt Power/Pack...

1 Answer

The spring that turns off the power in my Intermatic WH21 timer is broken. Where can I buy a new spring?


Parts are not available for WH21 240V water heater timer.
Timer has 1 year limited warranty.
http://www.intermatic.com/customer%20service/frequently%20asked%20questions.aspx
WH21 is rated for 25Amps and works on water heaters up to 4500Watts.
Look at label on side of tank to see wattage.
WH21 is SPST and turns off one hot wire to water heater.

I ran a business for many years.
Cost of stocking, organizing, and shipping parts is near same cost as new timer.

Following page shows selection of replacement timers:
http://waterheatertimer.org/Boxtype.html

For example, I have tested WH40 and T104 and other timers that show on page.
Trippers and motors are available for Intermatic box timers WH40 and T104, so you can maintain these specific models for many years.
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi
WH40 and T104 timers are SPDT and turn off both hot wires to water heater.
Both timers will work on any wattage residential water heater

http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
http://waterheatertimer.org/How-to-wire-EH40-hot-water-heater-timer.html

Feb 18, 2011 | Electric Intermatic Wh 21 Water Heater...

1 Answer

I have a ML300RTW and I do not hear any noise from the unit or ticking from the timer. When I advanced the timer to check if it would send power to the lights, they come on and when advanced to turn off...


Power packs do not have repair parts anywhere on the internet that I know.
Occasionally folks take power pack apart, but nobody reports being able to repair transformer or timer.

Once power pack goes bad, then it needs to be replaced.

Good news for your specific problem however:
'Harry' wrote to fixya with some information.
His timer stopped working so he bought cheap plug-in timer, set power pack to override, and then plugged power pack into cheap timer. Cheap timer turns lights on-off.
Harry also said his power pack has 5 year warranty and he was negotiating with Malibulights.com. No word how that came out.

Best I found are tips for next power pack that might save money:
The reason I add tips now, before your power pack needs replacement is some fella wrote fixya.
He bought 500 Watt power pack to replace 300 Watt > thinking bigger was better.
Power pack burned out. Here's why:
a) Match wattage of bulbs with wattage of power pack
Lets say you have fifteen 20 watt bulbs = 300 watts, so install 300Watt power pack
b) Installing a 500W power pack on 300W of bulbs will burn out bulbs and power pack.
c) Replace bulbs as soon as they burn out or other bulbs will burn out and power pack will burn out.
d) When working on bulbs, unplug power pack or power pack may burn out.
http://www.malibulights.com/guides_support/low_voltage_planning_guide/select_your_power_pack

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 11, 2011 | Intermatic Malibu 300W Power Pack...

1 Answer

I have the 300 watt xformer. Lights worked fine for quite a while...now the lights come on and go instantly off, agai and again almost 'flickering" I am positive I have less than 300 watts on the...


Use manual override and see if lights work correctly.
Check that bulbs are each working. If one bulb is burned out, then others will burn out, and the load change can cause power pack to stop functioning.
Always unplug power pack when working on lights.

Power packs do not have repair parts anywhere on the internet that I know.
I checked Intermatic, Malibulights, ebay, amazon, and listened to fixya customers.
Occasionally folks take power pack apart, but nobody reports being able to repair the transformer or timer.

Once power pack goes bad, then it needs to be replaced. Bad news because they're expensive.

'Harry' wrote to fixya with some information.
His timer stopped working so he bought cheap plug-in timer, set power pack to override, and then plugged power pack into cheap timer.
Harry also said his power pack has 5 year warranty and he was negotiating with Malibulights.com for replacement. No word how that came out.

Best I found are tips for next power pack that might save money:
The reason I add tips now, before your power pack needs replacement is some fella wrote fixya.
He bought 500 Watt power pack to replace 300 Watt > thinking bigger was better.
Power pack burned out. Here's why:
a) Match wattage of bulbs with wattage of power pack
Lets say you have fifteen 20 watt bulbs = 300 watts, so install 300Watt power pack
b) Installing a 500W power pack on 300W of bulbs will burn out bulbs and power pack.
c) Replace bulbs as soon as they burn out or other bulbs will burn out and power pack will burn out.
d) 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

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 04, 2011 | Malibu Intermatic Inc. ML121RT Low...

1 Answer

I have model ml600twsn 600 watt intermatic timer for my outdoor lights.Recently I have been unable to set them to turn off an on automatically. I can manually. what should I do?


You have malibu-type low-voltage transformer.

There are no repair parts for this type of timer, and nobody reports being able to fix timer once it goes bad.

1) "Harry" wrote to fixya with a work-around: He bought cheap plug-in timer, set malibu timer on override, and plugged malibu into wall timer.

2) Harry also said that his timer has 5 year warranty, and he was negotiating for replacement.
Contact Intermatic:
http://www.intermatic.com/customer%20service.aspx

3) Buy another timer:
http://www.amazon.com/Malibu-Intermatic-600watt-Professional-Transformer/dp/B000PGPO50

4) I found tips for next power pack that might save money:
The reason I add tips now, before power pack needs replacement is some fella wrote fixya.
He bought 500 Watt power pack to replace 300 Watt > thinking bigger was better.
Power pack burned out. Here's why:
a) Match wattage of bulbs with wattage of power pack
-15 each X 20 watt bulbs = 300 watts, so install 300Watt power pack
b) Installing a 500W power pack on 300W of bulbs will burn out bulbs and power pack.
c) Replace bulbs as soon as they burn out or other bulbs will burn out and power pack will burn out.
d) 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

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 27, 2011 | Garden

1 Answer

Power pack doesnt work and is under warranty how do I get a new power pack?


'Harry' wrote me Nov 2010 and said his power pack has 5 year warranty and quit after 4 years.
He said he was 'in negotiations' with Malibulights.com
http://malibulights.com/home.aspx
http://malibulights.com/customer_service.aspx

I asked him to let me know what happens, but no report yet.
Same for you please: Add a comment and let me know what Malibu says so information is available for all Malibu owners and fixya supporters.

'Harry' also gave me a tip.
He said Malibu timer stopped working on his power pack, so he bought ordinary plug-in timer, and set Malibu override to ON, and plugged power pack into timer.

While researching Malibu problems, I assembled some power pack tips.
The reason I add these tips now, before your power pack needs replacement is some fella wrote-in.
He bought 500 Watt power pack to replace 300 Watt > thinking bigger was better.
Power pack burned out. Here's why:
1) Match wattage of bulbs with wattage of power pack
-15 each X 20 watt bulbs = 300 watts, so install 300Watt power pack
2) Installing a 500W power pack on 300W of bulbs will burn out bulbs and power pack.
3) Replace bulbs as soon as they burn out or other bulbs will burn out and power pack will burn out.
4) 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

Dec 13, 2010 | Intermatic Malibu 121W Power Pack...

1 Answer

How to troulbe shoot my 300-Watt Power Pack/Timer. it doesnt turn on but it does turn off on time. had this product for 4 years and just now started having problems with the timer.


'Harry' wrote to me yesterday with handy malibu information.
1) Power packs come with 5 year limited warranty.
He is contacting Malibulights.com for a refund of some type.
Hope he writes back and says how that comes out.
2) He was having problem and plugged power pack into wall timer, then set timer.
Heh heh, pretty clever: Malibu transformer works, but timer doesn't, so plug power pack into a wall timer!!

That being said, I had same problem with my power pack.
I used blower to remove dirt and sprayed wd-40 and tried to take it apart.
My power pack was getting electricity.
Connections were good where lights tie into wire.
My lights never turned off.

Power pack doesn't come apart.
I turned it upside down thinking water got into timer.
I took it inside and let it warm up.
It still wouldn't work so bought another one.
Then I searched Intermatic and Malibulights.com for answer, but they have no troubleshooting or repair other than check electricity and check bulbs.
Conclusion: when power pack doesn't work, it is broken.
Unless you buy a separate timer and plug power pack into that timer as Harry suggests.

After researching power packs at Intermatic, Malubulights.com, ebay etc, the best I found were tips for next power pack that might save money:
The reason I add these tips now, before your power pack needs replacement is some fella wrote-in.
He bought 500 Watt power pack to replace 300 Watt > thinking bigger was better.
Power pack burned out. Here's why:
1) Match wattage of bulbs with wattage of power pack
-15 each X 20 watt bulbs = 300 watts, so install 300Watt power pack
2) Installing a 500W power pack on 300W of bulbs will burn out bulbs and power pack.
3) Replace bulbs as soon as they burn out or other bulbs will burn out and power pack will burn out.
4) 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

Dec 03, 2010 | Malibu ML300RTW - Low Voltage Power Pack...

1 Answer

My ge smart digital timer has been installed for over a year now and it just stopped working. the screen is blank. any ideas about what is going on with it


ae8e448.jpg
The GE digital timers are powered by the electric circuit.
A wire could have come loose inside the box.
The circuit breaker tripped.
A loose wire in the box proceeding the switch box (each box is linked to the next box as the wires trace back to the circuit breaker)

Try replacing timer with ordinary switch or test for power inside timer box.

These timers come with 1 year limited warranty.
If your load (lights fan motor) is close to wattage capacity of timer, the timer gets warm and doesn't last as long.

Oct 17, 2010 | Intermatic Inc. ST01C Digital In-Wall...

1 Answer

Timer on my 200W transformer is working but lights will not turn on manually or by timer. when i turn on with manual switch they flash on for a second then turn off. i am just under 200W for total...


You posted under Intermatic-malibu power packs.
Wattage of bulbs must match wattage of power pack or bulbs and power pack will burn out.

Your power pack might be damaged beyond repair.

For 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

Aug 23, 2010 | Malibu ML200RT - Low Voltage Power Pack...

1 Answer

Have a low volt intermatic transformer where only one side works.


If you have 2 sets of A and B terminals, then power pack is usually rated for 600 watts, with 300Watts on each A and B.
I don't know how to tell what wattage power pack is, except add up total watt amount of bulbs that originally came with unit. That should give approximate value of power pack wattage.

Open following link for Power Pack troubleshoot checklist and warranty information and other tips to keep power pack working longer:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
http://waterheatertimer.org/Intermatic-trippers-and-parts.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.

Sep 15, 2009 | Malibu ML600TW - Low Voltage Power Pack -...

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