Change diaphragm in gardena C 14e - GARDENA Hardware & Accessories

Battery operated water timers are made to last few years, and cannot be exposed to freezing temperatures or hot sunlight
http://waterheatertimer.org/Gardena-timers-and-manuals.html

Gene
h

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Open following link for T1030 manual and Gardena links, including link to contact Gardena and link for parts.
http://waterheatertimer.org/How-to-program-Gardena-C1060.html
http://waterheatertimer.org/images/Gardena-T1030D.jpg

I cannot find T1030D manual to help you solve the problem, other than suggest opening the cover using thumb-latch and change battery and clean the connections.

If you can scan your manual into pdf format and post it on your website, many folks would be happy to have a copy so fixya can help more folks solve Gardena problems.

Also add a comment and say what the manual says about the specific problem you are trying to solve.

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.

Some Gardena resources appear on following page, including Gardena link for parts.
http://waterheatertimer.org/How-to-program-Gardena-C1060.html

Add a comment and say where you were able to buy parts, since others are also asking for parts.
And also say how you were able to repair the water timer.

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.

Possible Gardena manuals are found on following link:
C14 manual does not show, but the T14e has very similar buttons and that manual does show
http://waterheatertimer.org/How-to-program-Gardena-C1060.html#manuals

To access the Gardena T120 diaphragm remove the oval cover at back with small flat screwdrivers to reveal the round retaining cover. The retaining cover unscrews to reveal the diaphram mechanism which can be removed and cleaned. Hopefully this solves the problem.
Dirt or sludge in here cause the timer to stay on or leak.
Stage 2 if the above fails.
Remove the front timer cover with very large flat screwdriver. Simply lever off the front timer cover. This is a brute strength operation. There is no tab or button to help remove the front. Insects and dirt can get in and stop the operation of the needle mechanism.
Stage 3
I do not know how to get to the mechanical timer itself. Any suggestions?

oct 2110
I cannot find parts or manuals on Gardena products.

Gardena.com has a product page and a contact page
They have technical drawings for some products so parts must exist somewhere.
Gardena product page
Contact Gardena

If you are looking for operation manual at Gardena, they only have sales brochures and technical drawings.

No joke, that is the longest I have ever heard of a Gardena timer working. I suspect you are correct about the diaphragm, but there is not much hope of finding new parts for that model. I suggest celebrating your amazing feat with a new (not as well made, sadly) Gardena timer and keep an eye out for a part at a garage sale to fix the old one when you can. I suspect you take very good care of your tools. So few people do anymore. Regards,
Farmerbear

Gardena timer is not identified.
Most water timers use 9Volt battery, but Gardena timers have up to three different model numbers for each timer.
Possible Gardena manuals are found on following link:
http://waterheatertimer.org/How-to-program-Gardena-C1060.html#manuals

Possible Gardena manuals are found on following link:
http://waterheatertimer.org/How-to-program-Gardena-C1060.html#manuals

From memory, I think you enter maintence mode my power on when holding down menu key then arrow to drum reset. If not post back and I'll look at user manual