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Old 01-16-2015, 08:50 PM   #1
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Aqua-Hot coolant

We have a new-to-us 2006 Intrigue. How much coolant is normally used? We have it at an RV park plugged in (no storage units available in the area), running the furnace only when it is predicted to freeze--which has only been a few nights. We have spent a few nights in the coach, but not many using the hot water, etc. Jerry has had to add coolant 3 times in the past month or 6 weeks. We don't see any leaks anywhere. Is this more than normal? Neither of us have ever had to add coolant that frequently in previous coaches.

Thanks!!
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Old 01-17-2015, 08:13 AM   #2
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We have a Hurricane Heater and we never have to add coolant.
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Old 01-17-2015, 09:05 AM   #3
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I don't know about more than normal but certainly more than I use. I have had the coach with an AquaHot 400D for over a year have have added a small amout once.
Probably need to be checked out.
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Old 01-17-2015, 09:19 AM   #4
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Quote:
Originally Posted by Jurhee View Post

We have a new-to-us 2006 Intrigue. How much coolant is normally used? We have it at an RV park plugged in (no storage units available in the area), running the furnace only when it is predicted to freeze--which has only been a few nights. We have spent a few nights in the coach, but not many using the hot water, etc. Jerry has had to add coolant 3 times in the past month or 6 weeks. We don't see any leaks anywhere. Is this more than normal? Neither of us have ever had to add coolant that frequently in previous coaches.

Thanks!!
If you are adding any Boiler Coolant more than a few ounces in a few years then you have a leak. Seek professional Aqua-Hot service to get it fixed. It's possible that your leak is at one of the floor radiators and not at the Aqua-Hot unit itself.

Replacing a Aqua-Hot is an expensive proposition. It's best to get this problem resolved quickly.

Dr4Film ----- Richard
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Old 01-17-2015, 03:22 PM   #5
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Thanks for the responses---they were exactly what I was expecting. We had scheduled service for some other items but had to cancel because Jerry will be having back surgery next week. Will reschedule ASAP and include this on the list!

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Old 01-17-2015, 03:25 PM   #6
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Jurhee,

It is possible that the AH was not full when you acquired the coach. If that is true your heat/cool/heat regimen over the last few weeks could result in taking fluid from the overflow reservoir into the tank. Then you would fill the overflow and it happens again.

I suggest that the next time the AH is cold, open the radiator cap and fill to the overflow tube in the neck of the tank. Also fill the overflow reservoir to the cold mark. Close it up and see if that solves the problem. You will be starting from a known, full condition making diagnosis more reliable.

Good luck.
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Old 01-17-2015, 04:01 PM   #7
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Jurhee,

It is possible that the AH was not full when you acquired the coach. If that is true your heat/cool/heat regimen over the last few weeks could result in taking fluid from the overflow reservoir into the tank. Then you would fill the overflow and it happens again.

Good luck.
Physically impossible.

If the Aqua-Hot main tank is not completely full to the cap then is it impossible for the fluid to travel from the overflow tank through the tube to the main tank. If the main tank was down just a little then once the main tank heats up and expands and flows into the overflow tank it will then use the fluid in the overflow tank to fill the main tank when it cools.

If that happens then once the main tank and the overflow tanks are equalized you should not need anymore boiler coolant fluid for a very long time.

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Old 01-19-2015, 07:41 PM   #8
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If any of the exchangers were leaking that much coolant on a regular basis, I would think you would see some evidence of that inside the coach, or smell the coolant. I had a leak on a fitting going to the exchanger in the wet bay and the evidence was coolant on the ground under the wet bay. It seemed like a small leak but I lost about 1/2 gallon of coolant in a week while waiting to get it fixed.

Good luck with the back surgery. My DW is having some of that next week.
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Old 01-19-2015, 10:51 PM   #9
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an excellent web page on all models Aqua hot and Hydro Hot heaters, forum and professional question/answer session.
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Old 01-20-2015, 10:56 AM   #10
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Quote:
Originally Posted by gsander1 View Post
Jurhee,

It is possible that the AH was not full when you acquired the coach. If that is true your heat/cool/heat regimen over the last few weeks could result in taking fluid from the overflow reservoir into the tank. Then you would fill the overflow and it happens again.

Good luck.
This is what I think happened. I don't know how long the coach sat unused before we purchased it. Jerry talked to a tech somewhere. He suggested that he let the system get hot, fill to the hot mark, then see what happens. We will see in a few days if it goes down again.

Thanks again for all the comments.
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