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Old 09-17-2014, 10:23 PM   #1
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How to properly maintain an Aqua Hot System

I just purchased a 2001 Monaco Dynasty regent MH, It has a total of 39,000
miles on it. I am in the process of changing filters, tires, batteries , belts
ect. It comes equipped with an aqua hot system which i am brand new to.
What type of maintenance is required if any to keep it in good working order.
Also have often does it recquire fluid changes or filter changes ect? Any thoughts or advice would be greatly appreciated>
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Old 09-17-2014, 10:32 PM   #2
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There is some annual maintenance but relatively easy. Best source for all things AquaHot is:
Aqua-Hot Questions

Roger knows all.
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Old 09-17-2014, 11:00 PM   #3
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How to properly maintain an Aqua Hot System

Servicing the AquaHot is a pretty simple job that you can do in about an hour for less than $50 in parts. It involves pulling out the burner unit, changing the burner nozzle, gap electrodes, clean combustion chamber and change the fuel filter. For cleaning the combustion chamber I took a small wire brush (toothbrush size) and attached it to a 12" long piece of wood to make an extra long handle. It makes the job a lot easier and a lot cleaner on your hand.

Just go to the AH website and download the service manual, it has all the info you need. If you don't know the age of the system fluid you'll want to change that at some point too.

You can buy the nozzle and fuel filter from Roger at the link provided by Dennis.
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Old 09-18-2014, 11:49 AM   #4
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In a 2001, you might want to think about flushing and replacing the boiler fluid. Be sure to use the approved fluid!!! Regular anti-freeze is the WRONG FLUID!!!

I was told after mine was flushed to run it for a while once per month to circulate the fluid. It is possible for this fluid to crystalize and plug the heat exchangers. Mine had done this before we purchased our coach. It was difficult to clean out the plugs, flush the system then put new fluid in. I would not have wanted to do this as a DIY project. It would have been VERY MESSY. I had one RV Tech refuse to do it at our site because of the mess. We ended up taking it to a dealer here in Florida to have the maintenance done. Fortunately the dealer who sold us the coach, and could not resolve the problem agreed to reimburse us the $1600 it cost to do this job!
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Old 09-18-2014, 12:14 PM   #5
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On a 2001 Aqua Hot I would be examining the combustion chamber VERY CLOSELY for cracks!
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Old 09-20-2014, 08:27 AM   #6
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Quote:
Originally Posted by Medico View Post
In a 2001, you might want to think about flushing and replacing the boiler fluid. Be sure to use the approved fluid!!! Regular anti-freeze is the WRONG FLUID!!!

I was told after mine was flushed to run it for a while once per month to circulate the fluid. It is possible for this fluid to crystalize and plug the heat exchangers. Mine had done this before we purchased our coach. It was difficult to clean out the plugs, flush the system then put new fluid in. I would not have wanted to do this as a DIY project. It would have been VERY MESSY. I had one RV Tech refuse to do it at our site because of the mess. We ended up taking it to a dealer here in Florida to have the maintenance done. Fortunately the dealer who sold us the coach, and could not resolve the problem agreed to reimburse us the $1600 it cost to do this job!
I think you are mistaken 01s and 02s would use regular anti freeze not boiler fluid, not recommended from what I have read to use boiler fluid if it is not required, and it is more expensive as well

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Old 09-20-2014, 09:08 AM   #7
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Depends on the model of AH. If it has a 431/12 as is in my MH it takes regular green antifreeze.
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