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 > A new mysterious random clicking that

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bob b

Grants Pass, Or

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Posted: 02/15/22 10:43am Link  |  Quote  |  Print  |  Notify Moderator

is driving us crazy. It is like the sound of a solenoid but it will click once or twice or ten times randomly. At times we won't hear it for hours then it clicks for half a day. It seems to be from the board that controls the Hydro-Hot but touching all the parts to feel the exact location is inconclusive. The one clue is that the top green light on the right side is on while clicking but when it's off the clicking stops. Any ideas?

[image]


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enblethen

Moses Lake, WA

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Posted: 02/15/22 12:55pm Link  |  Quote  |  Print  |  Notify Moderator

Sounds like a relay is turning on and off element for some reason.


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rgatijnet1

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Posted: 02/15/22 01:52pm Link  |  Quote  |  Print  |  Notify Moderator

From the picture it looks like you have a relay at the top and bottom(black boxes). When it is clicking a finger on the relay should tell you which one is clicking. Once you determine that you should be able to narrow down the cause.

larry cad

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Posted: 02/16/22 05:14am Link  |  Quote  |  Print  |  Notify Moderator

[image]

[image]

Keep in mind that Hydro Hots have been known to catch on fire. It would be a good idea to get it checked.


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bob b

Grants Pass, Or

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Posted: 02/18/22 11:30am Link  |  Quote  |  Print  |  Notify Moderator

I can't be sure which relay is clicking and I am having trouble finding a service-man that will come out to our park in Mesa, Az. I have shut it off for now, the photo of the fire convinced me. Any other ideas?

enblethen

Moses Lake, WA

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Posted: 02/18/22 12:26pm Link  |  Quote  |  Print  |  Notify Moderator

Maybe this will help.
Not sure which model you have.
Read on circuit board which LED comes on.
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dougrainer

Carrolton, Texas

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Posted: 02/18/22 01:40pm Link  |  Quote  |  Print  |  Notify Moderator

Larry Cad, I have been working on Hydro/Aqua Hots for almost 27 years and have NEVER seen a Circuit board do that. NEVER have a burnt mark on a Circuit board. That said, that white pipe in first pic, how close was it to the circuit board? Or was it on the outside of the black circuit board cover? There is no real small fuse protection on the Circuit board and the ribbon cable components. So, a DIRECT short from any of the Aqua Hot 12 volt components could cause that ribbon connector to burn and melt. Doug

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Posted: 02/18/22 10:40pm Link  |  Quote  |  Print  |  Notify Moderator

bob b wrote:

is driving us crazy. It is like the sound of a solenoid but it will click once or twice or ten times randomly. At times we won't hear it for hours then it clicks for half a day. It seems to be from the board that controls the Hydro-Hot but touching all the parts to feel the exact location is inconclusive. The one clue is that the top green light on the right side is on while clicking but when it's off the clicking stops. Any ideas?

[image]


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larry cad

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Posted: 02/19/22 06:14am Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

Larry Cad, I have been working on Hydro/Aqua Hots for almost 27 years and have NEVER seen a Circuit board do that. NEVER have a burnt mark on a Circuit board. That said, that white pipe in first pic, how close was it to the circuit board? Or was it on the outside of the black circuit board cover? There is no real small fuse protection on the Circuit board and the ribbon cable components. So, a DIRECT short from any of the Aqua Hot 12 volt components could cause that ribbon connector to burn and melt. Doug


Doug, you may recall the problems Hydro Hot had with their pump motors a while back. This came about due to a defective motor. I believe they finally got it fixed with the third set of motors and have replaced all the motors in this RV.

You are correct, no small fuse protection in the devices. Gotta wonder.

dougrainer

Carrolton, Texas

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Posted: 02/19/22 09:14am Link  |  Quote  |  Print  |  Notify Moderator

larry cad wrote:

dougrainer wrote:

Larry Cad, I have been working on Hydro/Aqua Hots for almost 27 years and have NEVER seen a Circuit board do that. NEVER have a burnt mark on a Circuit board. That said, that white pipe in first pic, how close was it to the circuit board? Or was it on the outside of the black circuit board cover? There is no real small fuse protection on the Circuit board and the ribbon cable components. So, a DIRECT short from any of the Aqua Hot 12 volt components could cause that ribbon connector to burn and melt. Doug


Doug, you may recall the problems Hydro Hot had with their pump motors a while back. This came about due to a defective motor. I believe they finally got it fixed with the third set of motors and have replaced all the motors in this RV.

You are correct, no small fuse protection in the devices. Gotta wonder.


I have replaced countless circ motors that failed/locked with the newer updated motors, but never had any of the failed components cause a burn. My belief is, that pic of the burned board indicate that someone who did not understand the wiring, crossed some wires or attempted to use a 12 volt power source on a circ motor and that caused the overload. Doug

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