Smart hose timer internal flooding

post by Fymaxwell on Jun 26, 2024

I’ve got water flooding into the battery chamber of my Rachio smart hose timer. I’ve been through this in the past with two units that Rachio replaced, and I am starting to wonder if it’s me or Rachio that’s to blame.

I am currently running four timers. Three of the timers are trouble-free. The one that is malfunctioning was bought at the same time as the two others that previously failed, so perhaps there were manufacturing issues with that batch? I’d appreciate any insight that the community might be able to offer, as this is starting to drive me mad.

post by Thomas_Lerman on Jun 26, 2024

I have one timer with no issues.

post by franz on Jun 26, 2024

@Fymaxwell I’m having our support team reach out to you. They will take care of you!

post by WaterMunkee on Oct 9, 2024

Same here. Twice. First time I thought maybe I could’ve incorrectly installed the battery door. Lots of corrosion inside after 45 days, device quit working. After cleaning thoroughly, I installed fresh batteries and battery door and ensured everything was snug. New batteries completely rusted/corroded within 45 days again, and again device quit working. Obviously this unit’s battery compartment is not waterproof. Frustrating!

post by bgorbet on Oct 24, 2024

Same problem. I’ve only had this device a few months and its already all corroded inside. Doesn’t seem like the waterproofing works well enough.

post by PamL on Nov 18, 2024

I have only 1 timer and I have the same problem with it flooding and the batteries corroding.

post by Jkuri on Dec 15, 2024

Hello,

I seem to have a similar problem with the battery compartment. When I went to swap out the batteries the compartment had water inside.

I am quite sure that it was installed properly and I am not subject to freezing temperatures.

Been less than 6 months so did not expect batteries to be expended already… installed in June.

post by rhawley on Mar 20, 2025

I’m having the same issue with internal flooding while my other timer is perfect.

post by Davico on Apr 22, 2025

I have the same issue in one of my devices, but both of them are not working as expected anymore. Water leaks from inside the device.

post by ecobuilding on Apr 28, 2025

Hi- I too am having the flooding issue. The two valves I’m running were showing as disconnected and I found the flooding when I thought it was a battery issue. I turned out the two screws holding the battery compartment to the valve body. The design is such that the flooding was confined to the battery compartment, and the circuit board and solenoid are sealed. Tried to capture in the photos.

post by dcampbell386 on Jun 24, 2025

I have (2) timers and both are having internal flooding and the batteries are completely eroded. What do I do?

post by uncgal10 on Jun 30, 2025

Oh wow, I am not alone! My Rachio keeps internal flooding, I was able to clean up the rust to get it to work again but it has not only rusted again now corroding the battery contacts. will be reaching out to support on this based on this thread.

post by jeffbankston on Jul 4, 2025

I’ve had the same problem, it almost killed a couple of my potted plants when it stopped working. Rachio sent me a new unit (kudos on that) but when I open it, it looks like the same design. There’s no way that little rubber foam pad can seal this battery compartment properly. The non-smart Orbit and other valves I’ve used have a much more robust battery sealing setup and I’ve used those for years with no leaking.

post by justinappleby on Aug 20, 2025

Same problem here. The battery compartment flooded and corroded the batteries and the internal terminals. I tried thoroughly cleaning the terminals and the interior of the battery compartment with 99% Isopropyl alcohol, just a blue flashing light with new batteries. This ‘smart’ timer valve has a dimwitted design.

post by JLpatinop78 on Dec 28, 2025

Merry Christmas @franz I love this product but I am experiencing same exact challenge, even with The battery door is properly closed and secured. Despite this, moisture is consistently found inside the battery compartment.

It appears that the battery door seal weakens over time, allowing water intrusion during normal outdoor exposure (rain or irrigation). This has resulted in repeated battery failures and renders the device unreliable for its intended use.

This issue appears to be related to a sealing or housing defect.