Truma Aquago error code 26

[Olive2Roam]

Went to turn on the hot water this evening and the Truma AquaGo is throwing off an error code 26: "Circulation pump current consumption error -  The current detector at the circulation pump has measured a current outside the permitted limits." I have seen a couple of posts about this particular error code but no definitive root cause. We are about to hit the road for a 2 week jaunt through the Carolina's so I am hoping we can resolve this one pronto but everything I have read makes it look like I need a Truma dealer. Anyone have any experience with this one?

Thanks!

Bob

[Patriot]

Bob, 

Here is an older thread that may help. Have you tried shutting the unit down completely? Sometimes this will allow the unit to reset itself. If that does not work I would contact Truma. You may need a new circuit board from what I have read in the thread below.

 

 

Edited yesterday at 01:44 AM by Patriot

[Olive2Roam]

1 hour ago, Patriot said:

Bob, 

Here is an older thread that may help. Have you tried shutting the unit down completely? Sometimes this will allow the unit to reset itself. If that does not work I would contact Truma. You may need a new circuit board from what I have read in the thread below.

 

Yessir, I did read through that. I do need to better understand what it means to shut the unit down completely. I will give that a try before calling Truma. Can you provide any guidance around achieving a "complete" shutdown?

Thanks,

Bob

 

[Snackchaser]

Hey Bob,

If you’re pressed for time and it doesn’t re-set, then you might be better off trying to fix it yourself because Truma service could be inconvienient, untimely and expensive.  I’d check for a degraded pump, or a debris jam thats causing excessive current draw as the error code indicates.  The year warranty is probably expired so it could be worth a try.

If the WH operates at all before the error code shuts it down, then listen for unusual pump noise and/or measure the current draw.  It normally runs just long enough to fill the reserve tank with hot water, and a DC clamp-on amp probe can be used to measure the current from the front panel.   

AC/DC amp probes are readily available and you can use the wiring schematic in the Truma Manuel to identify the pump’s wires where they enter the control board in front.  Just separate one of the pump wires from the bundle, and clamp the probe over it.  The pump is rated to draw less than 2.5 amps when pumping.

If the error code is preventing it from running, then you'll have to remove the WH and take the pump out for testing.  It takes a little time but it’s not difficult.  Drain it through the front flip down drain before disconnecting the plumbing.  Disconnect the propane line and unplug the control wire from inside the unit, cut the DC power at the splice in the back by the water connections.  Carefully use a heat gun, spray solvent such as Goo Be Gone, and plastic putty knife to break the outside seal, and have some butyl tape and outdoor caulking on hand to reinstall it.  

Once out, connect a standard 1/2" NPT residential faucet hose to the pump's intake, prime it, and put the other end in a bucket of water.  Connect it to a 12V battery with jumper cables and use stiff wire or paper clips to connect to the pumps plug.  It should pump with good pressure and <2.5 amps.  If the pump is okay, then unfortunately you're back to control board issues and probably going to the Truma dealer for diagnostics.  But you will only be out of your own time for trying.

The pumps are pricey at around $250 when I last checked.  Only buy one from a reputable dealer because I saw a fake site advertising them for $55.  

I hope this helps!  Good luck!  Geoff

[Olive2Roam]

Hey Geoff. Great advice. The WH does not appear to run in any way, shape, or form so testing the pump would be my next step. I am about 1 year and a couple weeks since our purchase, but I made a call to Oliver and they actually have a pump in stock. Since I am about 1.5 hours away I am going to make that drive and let them tackle it. I did speak to several other Truma authorized service centers, none of whom have parts and frankly, none of them inspired confidence in their ability to diagnose/fix the issue. I am hoping the Oliver folks will let me watch over their shoulder because I want to be a little more versed in the Aquago. By the way, it looks like the Aquago warranty is 2 years according to this. https://support.olivertraveltrailers.com/portal/en/kb/articles/truma-aquago-water-heater

But eventually I will be doing this work on my own so I am book marking your post and hoping I never have to use it. 🙂 

Thanks again!

Bob

[Patriot]

4 hours ago, Olive2Roam said:

Hey Geoff. Great advice. The WH does not appear to run in any way, shape, or form so testing the pump would be my next step. I am about 1 year and a couple weeks since our purchase, but I made a call to Oliver and they actually have a pump in stock. Since I am about 1.5 hours away I am going to make that drive and let them tackle it. I did speak to several other Truma authorized service centers, none of whom have parts and frankly, none of them inspired confidence in their ability to diagnose/fix the issue. I am hoping the Oliver folks will let me watch over their shoulder because I want to be a little more versed in the Aquago. By the way, it looks like the Aquago warranty is 2 years according to this. https://support.olivertraveltrailers.com/portal/en/kb/articles/truma-aquago-water-heater

But eventually I will be doing this work on my own so I am book marking your post and hoping I never have to use it. 🙂 

Thanks again!

Bob

Bob,

I think you’re wise to give Oliver an opportunity to tackle it. I hope they get you fixed up.
Please post up what you learn as could really help another member should this issue arise again. 
Thanks!

 

[Zodd]

21 hours ago, Olive2Roam said:

Can you provide any guidance around achieving a "complete" shutdown?

In regard to this. Here is what I have done when I need to "clear" a Truma code. I have not had your code but in case it helps.     

1) Open the panel to the heater outside. Turn switch to the middle or off position. Wait at least 30 seconds. Then turn it back on by flipping the switch up or down. 

The other option is reset and there are steps here for that. 
What is the reset function on the CP plus used for?