GHL stand alone doser

[Allmost]

Hello,
so my 3 pump doser is making a chipmonch noise when on. so I thought they are just noisy.

last night I connected the 3rd channel, run it, and it makes almost no noise, maybe some little clicking which can be hardly heard !

are the pumps on ch. 1 and 2 bad ? I got the unit less than 3 months ago lol

just wanna know before I try to take it to the dealer I got it from. thanks

 

[loup]

have you try cleaning the channel

http://reefcentral.com/forums/showthread.php?t=1582789&highlight=doser+clean

 

[Allmost]

appreciate that ! gonna try it tonight

hmmm, so I guess the GHL dealer gave me a second hand unit ... lol