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Old 09-29-2015, 02:02 PM   #1
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Fresh Water Pump Cycling

We have a new White Hawk 28RBKS, and just had our first weekend in it where we didn't have a city water hook-up at the site. Using water from the fresh water tank, the water pump sort of 'cycles' when running water through the bathroom or the kitchen faucet (and it does so on either hot or cold).

The pump runs continuously (as I would expect, normally) when flushing/filling the toilet. It only has the 'cycling' type operation when using the faucets.

Do I have air in the system somewhere, or...??? Any ideas?

We're under warranty, but I'd rather tackle it myself if it's an easy fix and I'm doing something wrong, in deference to dragging it to the dealer...

Thanks!
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Old 09-29-2015, 02:14 PM   #2
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That's how mine works too. It'll run full blast constant when I'm using anything except the bathroom faucet. When I'm using that faucet, it will cycle off and on.

I always just assumed that the flow was somewhat less from that fixture, so the pump would cycle because of the pressure demand. Pump would get the line up to specified pressure, then cut out, then faucet would relieve pressure so pump would kick back on. Keeps doing that until the faucet is closed, then pump gets line up to pressure again and goes silent until another fixture is opened.

Bathroom faucet is the only fixture it does this on.
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Old 09-29-2015, 02:43 PM   #3
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but now...

Now that you've heard it you'll may want to consider doing a few things to quiet it. Is your pump located somewhere that it can be reached?
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Old 09-29-2015, 02:45 PM   #4
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Thank you for the reply, Bob; to clarify, the pump cycles at a rate of about 1 sec bursts, and the pump stops immediately after the faucet is closed. It sure seems like it's hard on the pump to me. Our 2012 Keystone RV ran the pump continuously whenever any water supply was opened, so this pump seems to be operating inappropriately. Following your reply, I might call the dealer and find out if this is normal...
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Old 09-29-2015, 02:47 PM   #5
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The pump is really easy to access; it's located in the kitchen island and we've already had the cover off of it to check for a leak.
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Old 09-29-2015, 05:07 PM   #6
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Sounds like you need to install an accumulator. It's like a pressure tank in a house, if you're not sure what I'm getting at. Even a small one like the ShurFlo will reduce rapid cycling of the pump by means of a rubber bladder and compressed air on one side. This mod stopped rapid pump cycling, provided pressure spike relief, and quieted down the pump a little bit. I can get about 2 or 3 cups of water out of the faucet before the pump comes on, and it runs for about 5 seconds at a time (minimum) to recharge.
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Old 09-29-2015, 05:39 PM   #7
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What Skybound said! Camping World or Amazon has small accumulators for under $40. They make a nice difference.
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Old 09-29-2015, 06:26 PM   #8
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It's normal and an accumulator will help for sure but there is no harm to the pump due to the on/off cycles. It just means your pump is capable of pumping more water than the particular faucet is requesting.
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Old 09-29-2015, 06:45 PM   #9
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You guys are the best!

Thank you for putting my mind at ease about this pump. I will definitely be installing the accumulator, and thank you all!
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Old 09-29-2015, 07:22 PM   #10
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We have a 2015 Jayco Whitehawk 23MBH and ours does the same thing if we only open faucet halfway or less, if we open it full it stays on, I tried adjusting pressure switch, seems to help a little but it is a touchy adjustment
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