Alde pump staying on after shutoff

madtrout

My Alde 3020 started making a loud rhythmic sound like a fan or pump noise. Even after I turned off the Alde and even turned the battery disconnect it continued for about another 45 minutes. I reset the control panel and even disconnect the 12v to the Alde. This morning I turned it back on and it seems to be working. Any ideas on what is going on? No fault warning showed on the panel. Thx, Mark

madtrout

Just an added bit of info. When the pump is working it it usually quite quiet. This was a much louder rising and falling sound. Opening the access panel I found that the sound was coming from the back of the Tab past where the heating tubes run into the center area of the back.

pthomas745

The Alde circulation pump is about the size of a half dollar.  Not very big. 

You seem to have been connected to shore power.  Are you sure you aren't hearing the converter fan?

madtrout

I was on battery power 

BridgerSunset

The inverter is located about where you describe on my 2021 400..  Is it possible that's the fan noise?

pthomas745

I think someone mentioned something like this on the FB page a few days ago.  You can check to see if your pump is set to "Continuous" or "Therm" in the Alde settings menu.  The "normal mode" is "Therm".

The only way the pump stopped for that owner was by Resetting the Alde on the "Service and Reset" page of the Alde panel.

madtrout

It might just be fan noise, but it got quite warm under the bed. It’s working perfectly fine today after being off all night.

madtrout

And the pump was set to therm

madtrout

Inverter makes sense. That’s why it wouldn’t turn off when I turned the battery cut off.