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Aqua hot overflow

My coach is stored for the winter here in Canada.
My aquahot flow was below the cold mark on the indicator bottle and when I started the aqua hot and totally warmed it up recently the antifreeze still was low. I add antifreeze until just below the hot indicator and left it running for awhile.
After shutting it down and leaving it for a couple of weeks in extreme winter conditions -13 f etc I looked again and the fluid was almost non existent n the indicator. Do I have to be worried about this at  this moment or should I just check it in the spring.? I did remove the aqua hot panels and there was no fluid on the bay floors...none.
Peter    Alberta Canada
'98 U320 40'  Build 5359 M11 450 HP, Aqua hot, Blu Ox

Re: Aqua hot overflow

Reply #1 –
While it's still cool open the radiator cap on the aquahot and make sure the coolant is completely full. Then run a cycle and check the level in the overflow tank, top it off it's low.  The hose from the tank to the overflow needs to be leakfree so you may want to replace it.
Forest & Cindy Olivier
1987 log cabin
2011 Roadtrek C210P
no longer 1999 36' U320 build #5522
2013 Rzr 570 & 2018 Ranger XP1000
2006 Lexus GX470
2011 Tahoe LT 4x4
Previous 1998 45' 2 slide Newell, 1993 39' Newell

Re: Aqua hot overflow

Reply #2 –
I would say wait to spring and then check it.    We will wait to see what Rudy says.
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: Aqua hot overflow

Reply #3 –
Quote from: folivier –
The hose from the tank to the overflow needs to be leakfree so you may want to replace it.

The overflow hose is notorious for developing cracks as it ages (and goes through thermal cycles).  Check the ends, especially where it attaches to the radiator cap on the Aquahot.

Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Aqua hot overflow

Reply #4 –
Well Peter,  I would not worry about the coolant level till you bring the coach out of storage.  Open the radiator cap and fill the tank full of 50/50 engine antifreeze and distilled water.  Check the radiator cap is in good condition and the overflow hose on the radiator cap barb is supple and has a clamp.  When the burner brings the coolant up to temp and cycles off, fill the overflow bottle to the hot line.

I trust you have loaded the Aqua Hot fresh water loop with pink fresh water antifreeze.  If not, please call me in the spring when you bring it out of storage to get a new reman heater.  Fresh water in the loop will split the copper pipe loop which is very difficult to repair other than a reman heater.  This is a $$$$$ issue in your area.  Bless you if you did winterize it.
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Aqua hot overflow

Reply #5 –
I had it professionally done because I was just learning about the unit. I have called him and he confirmed the unit was filled with pink.....I guess I will see in the spring....and he would be liable. What is the first thing to look for IF it was not done correctly?
Peter    Alberta Canada
'98 U320 40'  Build 5359 M11 450 HP, Aqua hot, Blu Ox

Re: Aqua hot overflow

Reply #6 –
If fresh water loop is split, lots of fresh water will be leaking from the tank area when you pressurize the fresh water system.  It probably is just fine.
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Aqua hot overflow

Reply #7 –
here is crossing my fingers....Rudy...remember this post in about 1 month and a half when I discover victory or defeat....
Peter
Peter    Alberta Canada
'98 U320 40'  Build 5359 M11 450 HP, Aqua hot, Blu Ox

Re: Aqua hot overflow

Reply #8 –
also...if it is leaking will I be able to see it with the stainless cover on or will I have to take it off to view?
Peter    Alberta Canada
'98 U320 40'  Build 5359 M11 450 HP, Aqua hot, Blu Ox

Re: Aqua hot overflow

Reply #9 –
Peter, I was advised to remove the stainless steel cover and leave it off the aquahot.  I was told it keeps too much heat in the area around the electronics. 

I keep mine stored at home and will put it back when I sell my coach.  Don't throw it away because it is expensive to replace.

Rudy can give  a professional opinion on this.

With the cover on, you will see water under the coach below the aquahot if you have a leak.
1998 U320 40'
2005 GMC Yukon
MC# 17609