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HVAC, Air Conditioners, Aqua Hot, Primus, Webasto, Chassis Heaters, Furnaces and Water Heaters Questions and information about the wide variety of Heating and Air Conditioning as well as Water Heater systems available are discussed here.

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  #1  
Old 4 Weeks Ago
irmagoo's Avatar
irmagoo irmagoo is offline
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Default aqua-hot antifreeze corrosion protection

hi all
i have been working on my aquahot at randy's i replaces the domestic water loop (thanks randy) i also replaced the electric heating element i looked inside the boiler and the bottom was filled level to bottom of zone return line with nasty gunk caused by lack of maintenance... just like our engine system the antifreeze needs to have corrosion protection checked and added every year if necessary or you will have problems with system. i power washed scale and what knots out of boiler and did replace coolant i changed when i bought coach about 3 years ago i tried to clean boiler back then but didn't get much then as i just blow water in through radiator cap and out the drain valve-but with heating element out and blowing hot water in through the 1''hole i got a ton of stuff out!! so guess i'm trying to save you folks some work as seasonal maintenance of coolant mixture will eliminate the issue,,,i use a calgon test kit for corrosion level but the test strips from auto store will tell ya if your coolant needs help..
have a great winter, some where warm if possible!!
mike
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  #2  
Old 4 Weeks Ago
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Thanks for the info Mike, good to know.
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  #3  
Old 3 Weeks Ago
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Never gave much thought to that issue but now it's on my maintenance schedule. Thanks Mike.
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  #4  
Old 3 Weeks Ago
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no problem paul
good to hear from you
say hi to your bride
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  #5  
Old 3 Weeks Ago
photoadjuster photoadjuster is offline
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Mike, was it filled with the old green anti-freeze or the pink boiler fluid?
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  #6  
Old 3 Weeks Ago
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Quote:
Originally Posted by photoadjuster View Post
Mike, was it filled with the old green anti-freeze or the pink boiler fluid?
mine had propylene glycol-pink i went to ethylene glycol easy to get at walmart etc. it may have had that coolant since 2003 i have no way of knowing
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Old 3 Weeks Ago
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If you changed from propylene glycol-pink to ethylene glycol, you should have noticed a 30% increase in heat and comfort.
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  #8  
Old 3 Weeks Ago
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Quote:
Originally Posted by photoadjuster View Post
If you changed from propylene glycol-pink to ethylene glycol, you should have noticed a 30% increase in heat and comfort.
Really?
I never knew that.
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  #9  
Old 3 Weeks Ago
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green always is better for heat transfer..but just good for 5 yr
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  #10  
Old 3 Weeks Ago
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This is my Aquahot Coolant tank. The Aquahot will be two years old next month. The coolant was already changed once last July at the factory when replacing a thermostat. I can’t believe it has so much sludge in it.
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