Fish finder questions...

[dwag70]

I am a newbie to the fish finder ranks I normal have always been a flasher guy I find them easier to use. I have a humminbird fish finder that keeps giving false return.. Even sitting still it would show 256 feet of water when I knew we were in 12-15 ft at times it would bounce beteeewn the what I thought was right and number way off... So know for the questions I lake was dirty lots of alge.. and I left all of the setting at factory defaults.. Could this be a sensativity issues. I beleive I had the transducer straight up and down.. Any one have any ideas.. Like I said I am a beginer with the graphs so any info would be helpful even the basic stuff. I really dont know where were I went wrong and I think the unit is a good one humminbird 535pt this is not a cheap unit.. I tryed to run it in a pool about 2 ft deep and it still showed 200+ feet of water. Should the unit have displayed 2 ft. This was the unit first time out also ???

Help please ?

[dwag70]

Bumped for help !!!

[Dave1]

I don't know hummingbirds but it might a have a "reset default settings" item somewhere in the menu that should fix a bad setting if that is the problem.

Otherwise, sounds like a bad connection or cable, or transducer.

Hummingbird should have a web site with customer service line.

You could also contact the dealer you bought it from, or any dealer.