My vigoro water timer i bought at home depot will not stay on manual off/om or on its program. I have installed the new 9 volt battery correctly since i can program ok but it shuts off in a short time thereafter.same with the manual ?? any ideas ??

Clean battery terminals.
Reset timer, and see if functionality is restored.
Some timers go bad when battery is replaced. For example that is frequent complaint with Intermatic ST01C, etc.

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mine did the same thing. turns out one of the plastic gears had broken teeth. might be the same problem

Sun Smart is new GE timer.
http://waterheatertimer.org/GE-timers-and-manuals.html#15312

There is no repair for defective timer, except buy another at Home Depot and return defect in new package.
When I bought 15312 timer for testing, I found many packages at Home Depot were taped together as if people returned the timer. The large aluminum fin shows that timer is expected to get warm.
When testing the timer, the door stuck, and the timer seemed cheaply made. Intermatic brand timers are more robust at this time.
The instruction manual is not clearly written as could be, and timer requires a lot of button pushes for each setting.

Because the instruction manual is complex, requiring multiple button pushes for each setting, I suggest writing out the steps to make sure nothing is skipped over.

If lights turn on-off with override, then timer should be wired correctly.
Be sure to reset timer before programming.
Press setup button twice to begin programming.
Check programming for conflicts and overlaps that will cause timer not to function as expected.
For example selecting days of week. If program1 ON says turn on at 7:00 pm all days of week, and program1 OFF says off at 9:00 pm Tuesday.
Another point of confusion is Dawn-Dusk-Time. If you want timer to turn ON at 7:00, then select Time.

The vigoro duo delux might be same as Melnor 3100
Open following links:
http://www.melnor.com/instructions.php
http://www.melnor.com/instructions/3100_InstructionSheet.pdf

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Tork DTS200a/DZS200a is 2-channel digital timer with 365 day programming and astronomic capability.
2-channel means that timer can control two different circuits with different program schedule applied to each circuit.
http://waterheatertimer.org/pdf/1TORK.DTS200A.DZS200A.INSTALL_OP.pdf
http://waterheatertimer.org/Tork-Digital-timers-and-manuals.html#DTS

1) Timer has 'snap-in non-rechargeable 9-volt lithium battery'
Replace with ordinary 9 volt battery
Battery location is not apparent from image of product, and I don't own this particular timer line.
Add a comment and say where battery is located.

2) Programming is stored indefinitely in memory chip even if battery goes dead.
Current time might have to be reset shown in manual page 3.
Memory can be cleared using procedure outlined in manual starting page 13.

3) If timer function is not restored, then timer might have gone bad.
Contact NSI:
http://www.nsiindustries.com/contact-us.aspx
Many timers and other electronics are not protected from power surge.
Lightning strikes, electrical storms, and simple power outage can knock out electronic timers, and water heaters, water softener, treadmill, etc.
1-event Surge protectors can be installed in main panel to help protect circuits and electronics.

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The timer is no good.
1) Clean battery terminals and make sure battery polarity is correct.

2) If you bought timer at Home Depot, call:
Internet Customer Service Center at 1-800-435-4654

3) If you live near Home Depot, then buy new timer and return defect timer in new package.

4) Here's what Home Depot customers say about this timer: the product will fail after 4 months, only worked one season, failed right out of box, new batteries did not restore functionality, etc. Only two good reviews.

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At the
Bottom right there is a button to turn the program on and off. Make sure you have it on. I think a black little
Bar shows if it is on.

Most plug-in timers have rechargeable battery that is not replaceable.
Instructions say: Plug in timer for hour and then unplug it to set programs.
Intermatic makes a couple plug-in outdoor timers with replaceable batteries that load from back of timer, but otherwise batteries are rechargeable.
If battery will not charge, then display doesn't show, and that signals the timer is no good.
Take timer back if you can, and exchange for another.

I was looking at timers in Walmart and Target yesterday (since my specialty, and interest is timers).
New plug-in timers are inexpensive.
Lowes and Home Depot also carry inexpensive plug-in timers.

Be sure to save timer instructions because generally, store-bought timer brands don't show manuals on-line. Except GE brand timers from Home Depot.
Add a comment if you need more help.
http://waterheatertimer.org/Woods-timers-and-manuals.html

Buy new timer.
Battery operated clock motors stop working and there are no replacement parts.
Open following link for Gardena resources:
http://www.gardena.com/ca/en/sitemap/
http://waterheatertimer.org/How-to-program-Gardena-C1060.html#manuals

I also had this problem and found that the water pressure was too high. I turned the water spicket down one a a half turns (yours may vary) and now it's working fine.