Question about Intermatic 200W Power Pack & 12v Transformer ML200RTW

1 Answer

My ML200RTW isn't generating 12VDC anymore. It receives the 120VAC signal and the timer works (it hums and keeps the time). I can manually activate the timer switch, but no matter what position I put it in, the output stays at 0VDC. The unit worked fine for 3 years and it's never been moved. I recently discovered an ant's nest inside when I opened it to check why it wasn't working. Any ideas?

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1 Answer

Bad news.
There are no repair parts for broken power pack.
Terminals A and B should test for 12 volts, as you have determined.
Terminals C is for photo eye operation only.
If transformer hums, that is signal that it is working.
It might be possible to open case and somehow find the copper wire from the transformer that will produce 12 volts again, but nobody has reported being able to fix power pack.
Please add a comment and say if you are able to do this successfully.
ML series power packs have 5 year limited warranty, and you usually need the receipt.

Open following link for troubleshoot steps plus warranty links, money-saving tips for next power pack.
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 26, 2011

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