Re: New Thread on A54 fridge pumps (ATTN: OLIVER Vela Nautica)

Porter McRoberts

My controller also only puts out 24v. So I use 24v pumps only. And the controllers are no longer available says costal climate. But... pretty easy to build a 3 solenoid relay and a step down converter 24v-12v. That’s all that controller is. It would cost pennies.
Anyone done something similar?

On a separate note, what’s broken in the controller? Is there a manual override to force 12v? Could it be rewired? Fixed? Anyone taken one apart?

Lastly, just step down the 24v to 12v?

12v to a 24v pump would surely improve longevity

Some thoughts on this vexing problem.

A54-152 IBIS

Excuse the errors.
Sent from my IPhone

On Jul 2, 2020, at 10:04 PM, Dean Gillies <> wrote:

Your 12V pump is looking for about 4A supply at 12V according to its specs. The system is designed to operate with a pump supply current of 1- 1.2A at 12V. I suspect you have damaged your 51385 module.

Did you ever connect a different 12V pump from the specified pump by Frigidaire ? Maybe your 51385 is also fried.

I agree with your description.

I suggest to buy the correct pump, and with a 'working' 51385 (operating at 12V) everything should be fine.

Using the correct 24V pump, the pump is safe under fault conditions, so you won't damage the pump if the voltage regulation on the 51385 fails. The 24V pump operates on a lighter duty than a 12V pump operating at full tilt. This extends its life and makes it quieter.

Just need to be careful with specs about the pumps. Veco rebadge the Flojet 24V pump as a '12V pump' for continuous duty at half the flow rate.
This can be very confusing when discussing the pump, or trying to replace it with a different one.

Fun and games indeed!


Sent from my iPhone X

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