your laptop supply puts out dc? do they all?

plus i still have the issue of the pump having 3 input wires...

As far as im aware you still need to use the controller supplied or a similar device. The replacement power supply will only supply voltage to the pump. The 3rd wire will tell the pump how fast to run.

A spare power supply will though tell you if the controller is really at fault or if its an issue of the power supply, which is fairly common.

Yup, it puts out 19V DC. You would plug it into the controller to see if the pump works and that would tell you if it's the power supply or the controller as roblarss suggests. Usually any power supply will have a label that tells you the output so if you can find one at home that puts out 15 to 24V DC you could try it to see if the pump runs.

Whatever power supply you do find, also make sure it has sufficient wattage rating to run the pump. It's not just about volts.... so for a 2640 model like yours, you need at least 85 watts, 100 would be better. My ancient Compaq notebook power supply produces 18.5 volt & 120 watts.

If you check out the link I provided earlier on wire colour coding, green/yellow is most likely a safety ground. Seems like a pretty universally accepted convention. That would make the red & blue positive & negative DC supply wires & the pump should run with the appropriate voltage applied there, sans controller.

It's unlikely that a pump in this price range is going to have much sophistication housed within the pump itself, like control circuit feedback wiring. It simply reacts to varying voltage provided by the controller. Will run at a constant speed if presented with a constant voltage. I believe it's also a submersible pump, so a safety ground wire (green/yellow) is probably a very good idea.

And yes, any spare power supply will help determine which component is not working as advertised, even if you don't hook it directly to the pump.

pump side 3 pin connector with the dimple up is 24vdc right, gnd (-), left, 0-5v signal on bottom.

you should be able to test pump with low voltage between 0 and 5v on the bottom pin. 24v + is on right pin. common ground on the left pin for both.

This pump is same as the wp pump and has same pin standard...at least mine do.

I vote for smashing. HULK SMASH!!


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Personally, I think the pumps are fairly good. It's the power supplies that are crap and either die or fry the controller or pump. I managed to get a good deal on a new pump sans power supply and just bought the laptop power supply to run it. I'm hoping that proves more reliable.