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Old 03-03-2021, 02:34 PM   #1
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Aqua Hot not running cool down cycle

My Aqua Hot is not running the cool down cycle.
Anyone know where to start looking why?

Tim
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Old 03-04-2021, 06:13 AM   #2
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Have you tried Roger Berke's website?
RV Hydronic Heater Forum
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Old 03-04-2021, 09:25 AM   #3
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Update:
It runs the cool down cycle if I leave it alone. If I shut it off while it's running it shuts down in a couple seconds after I flip the switch to off.

Tim
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Old 03-04-2021, 01:41 PM   #4
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So, it was still burning when you flipped the switch off, and it shut down immediately?
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Old 03-04-2021, 03:09 PM   #5
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Could you have flipped switch off when it was already in cool down stage.
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Old 03-04-2021, 03:12 PM   #6
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Quote:
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Could you have flipped switch off when it was already in cool down stage.
That was my thought. Maybe it was just about to shut down.
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Old 03-04-2021, 08:46 PM   #7
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Quote:
Originally Posted by 96 Wideglide View Post
That was my thought. Maybe it was just about to shut down.
"Could you have flipped switch off when it was already in cool down stage."

Not positive, I will have to go out and check the exhaust for a test. Thank You,
It's happened a few times, so that's why I was asking. I will test it tomorrow.

Tim
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Old 03-04-2021, 09:37 PM   #8
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Yeah, flip the switch off shortly after you hear the fuel hit the igniter. See if it will repeat.
I know in mine, unless it's dead silent, no tv or radio, it's pretty hard to tell when your inside, whether it's burning, or just the exhaust fan running.
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Old 03-05-2021, 07:07 PM   #9
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Quote:
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Update:
It runs the cool down cycle if I leave it alone. If I shut it off while it's running it shuts down in a couple seconds after I flip the switch to off.

Tim
I did confirm this today...Coming up blank searching the web so far.

Tim
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Old 03-06-2021, 09:23 AM   #10
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Hmm.

Looks like you may be shopping for a new controller in the near future.
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Old 03-06-2021, 10:59 PM   #11
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I do have a spare controller I’m thinking I will be trying it tomorrow.
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Old 03-07-2021, 12:12 PM   #12
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Can you or anybody confirm turning off AH switch, does actually run a cool down cycle or does it stop everything. I have never checked. I 'll test mine this week to see.
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Old 03-07-2021, 12:18 PM   #13
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Can you or anybody confirm turning off AH switch, does actually run a cool down cycle or does it stop everything. I have never checked. I 'll test mine this week to see.
The manual states it runs a 2-3 min cool down (fan running) cycle after shut down. Going to change my control today and try it again.

Tim
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Old 03-07-2021, 02:03 PM   #14
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UPDATE:

I'm so glad I kept my original controller for the aqua hot. The rebuilt one I bought last May was the problem. The cool down cycle runs as it should now. All of the questions and trouble shooting I did last year pointed to the controller so I bought one from RV Hydronic Heater Repair. (most likely my error)

As you can see it only has a 6 month warranty. I will look into getting it repaired so I have a backup.

Tim
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