I havea Gardena C14e Water Timer and I took it apart to try and repair a small crack close to where the water enters from the tap. However after putting it back together the water now runs through it? Do I need to put some air pressure back into the device so the valve works? thanks ian

check to see if valve opening all the way also check for calcium build up

Check if you get water from the tap without water timer.
Look for obstruction in filter washer (rubber washer with screen mesh to keep debris out of timer)
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
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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

1) Copy following link to identify timer and download manual, to see if there is a reset protocol:
http://waterheatertimer.org/How-to-program-Gardena-C1060.html

2) If functionality cannot be restored, buy another timer:
http://waterheatertimer.org/Woods-timers-and-manuals.html#sprinkler

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

You can find a T14e manual at this address if you still need one after all these years.. It appears to be almost identical to a C14e manual. Garden Water Timer Electronic Operating Instructions ManualsOnline com

Reset timer to clear programs, and try programing again.
Copy following link for Gardena timer manuals
http://waterheatertimer.org/How-to-program-Gardena-C1060.html

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

Problem is not clear and timer not identified.

Open following link for Gardena resources including contact information for Gardena.
http://waterheatertimer.org/How-to-program-Gardena-C1060.html

If timer is cracked, then electric parts can get wet and stop working.
If timer valve is not closing, maybe the timer is broken or something is stuck in the valve.

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Also 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.

Open following link for some Gardena resources, including manual and link to gardena site.
http://waterheatertimer.org/How-to-program-Gardena-C1060.html

Gardena certainly has a glossy site, but I have been unsuccessful trying to contact the company.
Their products come with warranty and they show parts, but no hint where you can buy parts.

I do not know how to fix your plastic timer valve, or if parts would actually repair the thing.
Maybe glue except I don't know a plastic glue that holds on outside of device under water pressure.
Plus I cannot see where it is leaking, and there is no description that tells me if valve was left outside and cracked with freezing water, or if the valve is 10 years old, or if exposed to hard water deposits or minerals in the water, or particulate has scratched moving parts, or high water pressure, or if wd-40 spray lubricant dissolved the o-ring, or if the valve cracked from an impact, or if exposure to sun/heat has made the plastic brittle.

From fixya standpoint, gardena is the most problematic watering device.

There are no replacement parts for water timers.
Clock motors are small with plastic gears, and they wear down and get slow, and then overheat and quit. If timer is electronic, the circuit board and components have finite lifespan and don't last long exposed to elements and daily temperature fluctuation
Be sure to bring water timers inside each winter to avoid cracks caused by ice expansion.
Open following link for some Gardena instruction manuals:
http://waterheatertimer.org/How-to-program-Gardena-C1060.html

Add a comment with your experience so others with same-similar problem can benefit.

Also 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.

If you leave water inside plastic timer or plastic hose parts, and water freezes during winter, then the plastic will split as frozen water expands.
Buy new water control.

Open link below for some Gardena manuals including T1030
http://waterheatertimer.org/How-to-program-Gardena-C1060.html

By the way, if they made the same parts out of brass or copper, the brass and copper would expand instead of crack during a freeze, but the internal valves would be ruined anyway.
So plastic is a good material, just bring these things indoors or drain the water for winter storage.

Add a comment with your experience so others with same-similar problem can benefit.

Also 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.

Generally speaking, fixya sees more complaints about Gardena water timers than other brands. Maybe more Gardena timers are sold, or maybe the timers have problems.
There are no sources for water timer parts for any brand, and nobody reports being able to fix a water timer once it goes bad.
Any plastic outdoor device that works with a battery-operated clock motor cannot last more than a year or so, and will crack if exposed to freezing water.
I suggest the cheapest timer.

Open following link for Gardena resources:
http://www.gardena.com/ca/en/sitemap/
http://waterheatertimer.org/How-to-program-Gardena-C1060.html#manuals