Suunto Cobra3 odd behavior then failure

[jsnyder]

I’ve had my Cobra3 for just over 3 years and it has about 235 open water Dives + a bunch more pool sessions on it. About a year ago I pulled it out of a daily storage locker in Bonaire one morning lonely to find that around midnight it had decided I was diving and it logged a nice, 0’, 8 hour dive! I cleaned it really well and all seemed to go back to mostly normal except the temperature gauge never seemed to work right after that. ~50 Dives in the time since and all has been well....

Today I was with students on a pool refresher in 12’ and I saw that Cobra hadn’t automatically gone into dive mode so I put it there manually. I looked down a little later and saw what looked like reasonable tank pressure reading but unit said 1’ in bottom when I was at 12’. Also, temperature reading showed ———. Took it back to shop and put it into test chamber and it would not go into dive mode.

Has anyone seen anything like this before? Is there a master reset of some kind? Unit says battery is fine.

Thoughts? Suggestions?

 

[a878bob]

It’s been my experience that the depth sensor has failed, and there is no fix for it. Be prepared to scrap it. Suunto will not likely fix it, the old cobras lasted quite a bit longer, but the new version seems to have a different sensor that doesn’t hold up.

 

[etav]

try to email divesettlement@suunto.com with your complain. Even claims are past due for USA, Canada is starting a class action late 2019. The less waves, the better. I face myself problems on one Cobra 2, and 2 Cobra 3. The bug is inside the software: My last Cobra 3 cannot give any air pressure once in dive mode. Everything else works. Tank pressure is correct while on the boat. Not any more when in the water.

 

[Bigbella]

I too had similar problems with a Cobra 2 -- either logging phantom dives; or else, refusing to enter a dive mode and / or registering ridiculous depth readings.

My situation turned out to be fouled wet terminals and not the more grievous failed depth sensors that others had experienced, even though they appeared clean to the naked eye.

Some quality time with a sonic toothbrush and vinegar did the trick . . .