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Author Topic:   Humminbird display fogging
1985supersport15 posted 08-07-2008 12:57 PM ET (US)   Profile for 1985supersport15   Send Email to 1985supersport15  
Anyone had trouble with the display on HUMMINBIRD SONAR fogging? HUMMINBIRD says a little fogging is normal due to natural humidity and the air inside the unit screen. Sounds like a design flaw to me. Anyone experience this with other manufacturers?

Any way to fix the problem?

oldfoxy posted 08-07-2008 01:10 PM ET (US)     Profile for oldfoxy    
A friend and myself both have 765's with the same fogging problem. I got the same answer as you did from Hummingbird. It does go away quickly though..
Chuck Tribolet posted 08-08-2008 07:48 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
I had a HUMMINBIRD (still do, though it's not on the boat
anymore) that got a fog on the inside of the screen. Well
after the warantee ran out, I opened it, wiped it off (it was
sort of fine white powder) and put it back together.


jimh posted 08-09-2008 08:46 AM ET (US)     Profile for jimh  Send Email to jimh     
I do not recall any problems with the display of my SONAR or my chart plotter having condensation or fog.
brillwills posted 08-09-2008 09:14 AM ET (US)     Profile for brillwills  Send Email to brillwills     
Have had this problem on 3 occasions with
Navman GPS, Navman Fish Finder, Navman Combination

Fog up in rain or high humidity ? to a point where its impossible to view, stopped it briefly on latest combi by putting "vaseline" around seal

All the units were 2nd owner so no warranty

But does seem to be a problem with several makes

Paul (Wales, UK)

Hoosier posted 08-11-2008 09:30 AM ET (US)     Profile for Hoosier  Send Email to Hoosier     
I had this problem with my Humminbird 3D Vision. I returned it to Humminbird, out of warranty, and paid to have it fixed. About a year late the same problem recurred. I took the display unit, loosed the screws to crack the "seal", put the whole thing in a zip bag with a pack of silica gel and left it for a couple of months. After it cleared up I opened the case and put a small pack of silica gel in a void, resealed it and haven't had a problem since.
Slippery Eel posted 08-14-2008 01:36 PM ET (US)     Profile for Slippery Eel  Send Email to Slippery Eel     
I am not a big fan of Humminbird products. Had the same issue on the depth finder I had on my montauk. Fixed 2x's by humminbird. No more "birds" for me. Never had a problem with Garmin..
kwik_wurk posted 08-14-2008 02:38 PM ET (US)     Profile for kwik_wurk  Send Email to kwik_wurk     
As others have stated, fog seems to happen and it is not abnormal (but still unacceptable).

The good news is the moisture should not affect the electronics. Most electrical boards are "sealed" with a non-conductive spray (coating) that seals all the individual circuits in place.

In fact some circuit boards can be rinsed off if they get salt water on them. (I am not saying ALL boards and screens can be rinsed, but most can after unplugging power and other ribbon cables.)

My solution has been to open the unit up to "air out" on a hot sunny day. Or I will remove the unit and use the oven to dry it out. Turn the oven to warm, and then subsquently turn it off and put what ever you have on a cookie sheet with the oven slightly ajar. (And of course the unit needs to be cracked open, and batteries should be removed if there are any.)

The cleaning with rubbing alcohol and the oven techinique has revived several dunked cell phones and a handheld GPS.

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