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Old 01-03-2015, 09:48 PM   #1
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Water Pump...im stumped

My AI 2014.5 is possessed this week.

Filled fresh water tank

When I turn pump on
It keeps pumping but no water comes out.

Usually it turns on then goes quiet until I turn a faucet o flush toilet.

Any ideas?

Thank you.
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Old 01-03-2015, 10:01 PM   #2
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Possible causes.

Quote:
Originally Posted by Glamper1 View Post
My AI 2014.5 is possessed this week.

Filled fresh water tank

When I turn pump on
It keeps pumping but no water comes out.

Usually it turns on then goes quiet until I turn a faucet o flush toilet.

Any ideas?

Thank you.
Hi, inlet lines or filter leaking air; See if your lines into the pump are tight and see if your filter fell apart.
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Old 01-03-2015, 10:03 PM   #3
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Perhaps the pump is bad, or there is a clog in the line. Pull the pump out and bench test it.
If it is good then check the line for blockages.
Good luck
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Old 01-03-2015, 10:07 PM   #4
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Thank you
For now
Im connected to water supply so ill have it checked this week
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Old 01-03-2015, 10:29 PM   #5
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See the thread topic "Filling Water Heater" December 29th, post number 6.


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Old 01-03-2015, 10:29 PM   #6
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Let's see… The pump runs and runs but no water is coming out. First thing to do is, shut off the pump. It is cooled by the water it pumps, and can overheat if you let it run dry for very long. Take out the bottom drawer in the galley so you can reach the pump, and feel it to see if it's getting hot. Leave it off until it's cool to the touch.

Next, check the inlet connection. It's possible that pump vibration, or bumps and potholes along the road, caused the inlet line to work itself slightly loose. If that happened, the pump will suck air and not self-prime as it's supposed to.

Then check all of the outlets downstream of the pump; including the water heater drain and low point drains. If they're not tight, you could be pumping water onto the ground instead of to your faucets.

I'm assuming that the inlet line is not clogged. In theory, as long as you keep the fill port closed except when you're adding water, and keep the drain plug closed except when you're emptying the tank, and only fill with clean water, there shouldn't be anything in the tank that you didn't put there. But just in case, open the fill port. Remove the inlet line from the pump. Blow compressed air backwards through the inlet line and into the tank. If you hear the tank bubbling, you know the line is clear. Just like blowing bubbles in your drink through a straw when you were a kid. Then reconnect the inlet line, making sure the connection to the pump is airtight so that the pump can self-prime.

Finally, in order for water to be pumped out of the tank, air has to get into the tank. I've never had a problem with the tank vent on my Interstate, so I'm not sure where it runs, exactly; I've never had to trace it. But if the tank vent is clogged, that could also prevent the pump from pumping, by providing a suction that's working in opposition to the pump. Open the fill port to let air into the tank and see if the pump will self-prime then. If it does, then you know the vent is clogged.
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Old 01-03-2015, 11:11 PM   #7
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Protagonist
Thank you for taking the time to respond.
You are awesone.
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Old 01-03-2015, 11:47 PM   #8
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You don't have to worry about the pump overheating. It is a diaphragm pump. It is not water cooled.
If the pump runs and you have water in the tank.
Try disconnecting the discharge line from the pump. Run the pump and see if water comes out. If so. Reconnect the line open a faucet. Turn on the pump.
Sometimes air will get in the pump and it won't prime.
Hope this works for you.


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Old 01-04-2015, 12:26 AM   #9
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One time I had to blow low pressure (~40 psi) air into the fill port to get the pump to prime. I wrapped a rag around the air line to allow it to pressurize the fresh water tank and the pump primed and all was well.
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Old 01-04-2015, 07:28 AM   #10
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NO water whatsoever comes out, or a tiny bit of water trickles out and then nothing??

We had the latter happen because there was a little screen filter in the assembly which had clogged with the type of general slime that can build up without there being a chlorine residual in the water (this happened right after we bought our 2007 so it was an issue inherited from previous ownership). My husband located the screen and de-slimed it; I didn't see where in the system it was. Then to my amazement the pump worked perfectly.
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Old 01-04-2015, 10:37 AM   #11
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Quote:
Originally Posted by 73shark View Post
One time I had to blow low pressure (~40 psi) air into the fill port to get the pump to prime. I wrapped a rag around the air line to allow it to pressurize the fresh water tank and the pump primed and all was well.

If this is the first time you have filled your water tank it likely is a priming problem as 73shark mentions above. Try getting it to prime before you start taking anything apart.


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Old 01-04-2015, 11:28 AM   #12
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If you don't have an air line handy, you may be able to achieve the same effect by placing a hosepipe in the water filler and sealing around it with rags/towels and turning on the water. Open a faucet inside and turn on the pump. The idea is to try to replace air in the lines with water using gentle pressure on the filler side.


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Old 01-04-2015, 03:36 PM   #13
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Great idea UKDUDE! That's sounds even easier than dragging out an air hose that not everyone has.


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Old 01-04-2015, 10:02 PM   #14
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Thanks im looking forward to trying that tomorrow UKDUDE
Otherwise ill just have Airstream fix it.
Im dangerous with my hands
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