Calibrate An Aqueon Pro

nikm128

Hello all, so I've had an aqueon pro 200w for a few months now, but I have to set the temperature knob 2-4 degrees higher than I want in order to get the right temp. If I want the tank at 80 I have to put it at 84, if I want it at 78 it's set to 80
Anyone know how to correct the knob?
 

WTFish?

Same here, it’s just the way it goes I guess.
 

Cichlidude

Well I went to the Aqueon web page and read the manual for your heater. There is no mention of the calibration you want. Best to just make the math work. Or get a small bottle of orange florescent paint and just dab it on the temperature you want.

I do know the Eheim heaters do allow you to perform this calibration. I bought one and found out about it after the fact. It works.
 

nikm128

Alright, that does mean 80 is the warmest that heater will ever go though since the cap is 84. Not that I need it that warm, just interesting it's off by so much
 

Cichlidude

Alright, that does mean 80 is the warmest that heater will ever go though since the cap is 84. Not that I need it that warm, just interesting it's off by so much
Well not sure. If you turn it up to the highest what is the water temperature? That would be your max at your ambient room temperature.
 

coralbandit

Is this one of the new ones or the before ?
 

nikm128

Highest temperature I've seen was ~81 in the 20 gallon it used to be in.
If the room was too cold and I had it set to 84, wouldn't it just stay on? It actually shuts off between 80-81

Is this one of the new ones or the before ?
It's the first pro model, blue knob, led indicator on the front. The new one has the red knob with the led built into that
 

Cichlidude

Highest temperature I've seen was ~81 in the 20 gallon it used to be in.
If the room was too cold and I had it set to 84, wouldn't it just stay on? It actually shuts off between 80-81


It's the first pro model, blue knob, led indicator on the front. The new one has the red knob with the led built into that
If the heater stays on that means the ambient temperature is lower than the heater output to maintain a set temperature so there is more heat loss due to ambient temperature. If it cycles on and off, it can maintain that set temperature.

So in your case above if the heater is turned all the way up and it cycles on and off between 80-81 degrees according to your thermometer, that is the max it can go for your ambient room temperature (which you have not stated).
 

nikm128

Last I checked, it was 67-68. According to their chart, a 200w should be able to heat a 55 gallon ~15 degrees warmer than room temp. So at 67-68, the max temp should be 82-83 IF this were a 55 I was talking about
 

Cichlidude

Well here is the chart that I have been posting for a while. Matches pretty much what you say for a 55. In a 20 gallon, more than enough but it may have an issue from the sounds of it.


Heater Guide.jpg
 

nikm128

Interestingly enough, I tested it on a 40 gallon and it still reached 80 (while set to 84) and then shut off
 

coralbandit

It clearly sounds like the knob is not positioned correctly or the heater defective .
Give aqueon a call or email. LIMITED LIFETIME WARRANTY means something .
They will probably just send you another which doesn't solve your issue but would be cool to snag a freebie.
 

nikm128

I will probably be doing that then. I don't need the extra heat for this tank, but a free extra is nice
 

Islandvic

Mark where the knob is at now and make a note of current temp.

Pull off the knob being careful to pull straight up.

Push the knob back on where it points to current temp.

I have a first gen Aqueon Pro 250 in my 75, and a regular Aqueon 100 in a 10g, amd both have never accurate.

I just bump up or down the knob to get to the temp I want.
 

mkarps

Sorry to bring back an old thread from the dead but I think I found a way to possibly calibrate the knob. I noticed on mine when attempting to turn the knob that the top black rubber bumper will rotate just slightly. I turn my knob all the way to high or low and it will line up with he knob now and seems to be heating in line with he dial.

I just want to make sure this rubber bumper is supposed to move and it won't cause the heater to malfunction. It moved very easily as I was attempting to adjust the knob. Has anyone else tried this?

Thanks!
 

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