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Old 01-22-2019, 08:28 PM   #1
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Oasis Summer Loop went bad, will the other two very soon

The Summer Loop Oasis pump went bad on my 2015 Dutch Star in little over one year. Now wondering how soon one or both of the other two will be going out making keeping the coach warm a little hard.
Anyone had to replace either of the two Winter Loop pumps very early in ownership?
Thinking about carrying an extra pump for emergencies but they are fairly expensive if not needed.
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Old 01-22-2019, 09:13 PM   #2
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Quote:
Originally Posted by wagonmaster2 View Post
The Summer Loop Oasis pump went bad on my 2015 Dutch Star in little over one year. Now wondering how soon one or both of the other two will be going out making keeping the coach warm a little hard.
Anyone had to replace either of the two Winter Loop pumps very early in ownership?
Thinking about carrying an extra pump for emergencies but they are fairly expensive if not needed.
If you know the Spec on the Pump - similar pumps to these have been used in Aqua Hots so you might just check one out to see if it might work for you.

https://www.amazon.com/s/ref=nb_sb_n...ing+Water+Pump

Think the key is liters per minute - some are around 5 some are around 10 - thinking they both work but a 10 might be a little better.

Just a Thought,

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Old 01-23-2019, 04:36 AM   #3
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My summer loop pump went at around six months. The heat loop pumps are still working at 2 1/2 years. I bought a spare pump from ITR so there won't be a delay in fixing it again if we are traveling.

My observations of our system is that the summer loop pump runs a lot more than the other two pumps. The heat loop pumps will come on only when heat is called for by the thermostat. The summer loop pump cycles all the time if you leave the AC1/AC2 or the oil burner on.

Also, if you turn the oil burner and electric off, there is a point where the summer loop pump comes on but the coolant in the Oasis is not hot enough to satisfy the temperature sensor. What happens is the summer loop pump runs continuously for what seems like hours until the fluid in the Oasis is cool enough to shut the system down.

Lately I either leave the AC1/AC2 on all the time or I turn off the oil burner and the electric before I take a shower. This causes the fluid in the Oasis to get cool enough that the summer loop pump does not run continuously as the system cools down.
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Old 01-23-2019, 06:06 AM   #4
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Oasis Pumps

Also 2015 DS - replaced Summer loop pump at 2 year point and just now replaced Loop 1 pump coming up on 4 years. Newer model pumps are said to be better.
Good luck
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Old 01-23-2019, 06:42 AM   #5
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We had to have the summer loop replaced at the 13 month mark. We are full timers. Newmar covered everything even though it was past the 1 year warranty.

I certainly hope we do not have to replace a pump every year or two, that could get expensive.
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Old 01-23-2019, 06:53 AM   #6
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What’s a summer loop? We do not have this in our Aquahot.
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Old 01-23-2019, 07:25 AM   #7
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400 series use the loop through the 1/2 bath since they only have 2 pumps which heats it up even if you have AC on

This is why you always want both the electric and diesel switches off if you aren't planning on using hot water

You can add a manual loop if inclined
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Old 01-23-2019, 10:20 AM   #8
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Hi MrUSA - The summer loop pump is somewhat similar to the stir pump in the Aquahot. But there are differences too. In the Oasis the summer pump circulates boiler fluid between the boiler and the tank in the distribution box so that hot water is available even when the cabin heat is not called for. If the summer pump dies then the circulator pumps for the cabin heat must be turned on to produce domestic hot water. The summer loop switch does that.

With the Aquahot the stir pump causes the boiler fluid in the boiler to "stir" so that the temperature of the fluid doesn't stratify and the copper coil is able to extract heat from the boiler fluid. When the stir pump dies you tend to get some really short showers.

That's a quick and dirty explanation but hope it helps.


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