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Old 11-01-2015, 07:39 AM   #1
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aqua hot not heating the air out of vents

Hi all-- we just bought a 2014 entegra anthem-

turn the heater to on position on the thermostat ( zone 1 ,2 and 3 ) leave it on the gas setting. the blowers kick on fine and blows air but it does not get warm.
aqua hot fires up fine- the water portion of the aqua hot heats up great. just the heating part from the vents.
anybody know what I could possibly check before takeing it somewhere to be looked at - the coach was sitting for awhile-
thanks
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Old 11-01-2015, 07:50 AM   #2
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When you say that it "fires up", I assume that you're referring to the diesel burner. If that's the case, then check your circuit board for green lights. If the zone lights are green, would seem that the check valves are probably stuck from not being used. No circulation, no heat. A sharp rap with a light hammer will likely free them up.
For all things AquaHot, check the forum at

Aqua-Hot Questions

Roger knows all!

Good luck,
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Old 11-01-2015, 07:57 AM   #3
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do you mind telling me where these check valves would be that I need to tap with a hammer? makes sense- thank you
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Old 11-01-2015, 08:20 AM   #4
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You don't say what model you have but in mine you pull the cover on the Ah and you will be able to feel the pipes and see if they are hot If not you will see the wires to the valve and just tap on valve body and see if it opens. Do not hit the plastic or wires Just the brass
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Old 11-01-2015, 08:40 AM   #5
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I have the aqua hot 450 -- I had a 03 dynasty which I believe the aqua hot unit was the early design- my guess totally different than these new ones, that being said any suggestions as to where these check valves might be?
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Old 11-01-2015, 08:50 AM   #6
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They are at the outlet of the pump. Brass fitting with the PEX lines connected. Give Roger your model number at the AquaHot forum and he'll give you the facts.
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Old 11-01-2015, 08:52 AM   #7
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You did not answer the burner question asked by Dennis4809. If it is cold and you are using electric only, you need to turn the burner on.
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Old 11-01-2015, 09:00 AM   #8
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I have the 450-DE1, there is a low temperature cut-off switch in the domestic water supply (on demand) inlet; if this switch measures a lower temperature (i.e. cold water flowing to the inlet) it shuts off the circulation pumps for the heating zones. The on demand system has priority over the coach heating,

My sensor went bad and I had to replace it to get heat into the coach again. It always measured low.

Aqua hot provides all the manuals online - here is the manual for my 450-DE1, it also applies to 450-DM1. Great pictures showing locations of everything, including check valves!

Hope this helps,
Brian
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Old 11-01-2015, 06:40 PM   #9
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Quote:
Originally Posted by BrianGlenn View Post
I have the 450-DE1, there is a low temperature cut-off switch in the domestic water supply (on demand) inlet; if this switch measures a lower temperature (i.e. cold water flowing to the inlet) it shuts off the circulation pumps for the heating zones. The on demand system has priority over the coach heating,

My sensor went bad and I had to replace it to get heat into the coach again. It always measured low.

Aqua hot provides all the manuals online - here is the manual for my 450-DE1, it also applies to 450-DM1. Great pictures showing locations of everything, including check valves!

Hope this helps,
Brian
Yes, on the AH 450 series, the call for hot water will shut off the heating availability until the demand for hot water stops. On the AH 600, you can have hot water and heat at the same time...not with the 450 series.
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