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Topic: Puzzling aquahot control issue, second chapter, the double nut. (Read 232 times) previous topic - next topic

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Puzzling aquahot control issue, second chapter, the double nut.
About a week ago I posted "Aquahot control issue, Rudy rescued me..."

with the conclusion that the the culprit was the diesel switch in the kitchen.
I obtained a switch, replaced it and the aquahot furnace came on.

I failed to test the switch I...

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  • Pyolet
  • [*][*][*][*]
Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #1
Awesome find and share, Klaus!!  Keep 'em coming!!!

Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #2
I noticed in your picture that you have 2 15 amp fuses.
I was working on my aqua hot today and noticed the same thing yet my manual shows all my fuses being 10 A.
I switched my 2 15A to 10A.
Don't know if I did the right thing.
I will check those...

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  • dsd
  • [*][*][*][*][*]
Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #3
to my surprise there was a second nut underneath.  This one was loose, and had a connection to the control unit. I torqued the second nut, reattached the two cables and torqued the first nut...


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Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #4
I noticed in your picture that you have 2 15 amp fuses.
In the photo there is a wiring diagram in the upper left.  It shows five 10 amp fuses and fuse "F" (Diesel-Burner) is 15 amp. 

Richard

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Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #5
Good observation,

I sure missed that.

To be safe, I will change the one 15A fuse back to 10A as in the wiring diagram.

At some time this winter I am contemplating to post an essay on the forum titled something like :" Lessons learned from buying a...

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  • dsd
  • [*][*][*][*][*]
Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #6


At some time this winter I am contemplating to post an essay on the forum titled something like :" Lessons learned from buying a technically advanced coach like Foretravel


My essay would be...

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Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #7
Richard you are correct the last fuse is 15 A.
I don't know why my manual shows a 10 amp.

I went to the Aquahart website and looked at the manual there for my unit and it also shows the last one on the right to be a 15 amp fuse

The first two...

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Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #8
That double nut is used fairly commonly by other manufacturers. I had similar issues with my Newells.
Checking for voltage and finding 12+vdc can mislead you to pass over a problem like this. Voltage will pass until you start pulling amps then the...

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Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #9
More than one of us have had the nut on the ground post get loose and just fall off and then ground cables come off and then what.

It always reminds me to start with the most basic level and work out from there.


Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #10
Two of the pictures show a loose wire with a spade connector. One picture the wire is white and and the other picture it is red. I have that same loose wire. What is that wire for?

  • Rudy
  • [*]
  • Commercial Member
Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #11
Alan, If the loose red wire disappears into the harness going to the burner, it is the diode wire.  The diode wire should be connected to the load side pump (bottom) connection of the middle relay.

Re: Puzzling aquahot control issue, second chapter, the double nut.
Reply #12
 The process for finally figuring out what the actual cause was is an example of the principle of Occam's razor:

"From all possible explanations for an occurrence the simplest one is the one with the highest probability"

Regards

Klaus

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