Why does RV water pump keeps running?

1. An RV water pump that cycle while you are not using any faucet means you have a leak somewhere in the plumbing system.

The most common causes of leaks are a loose connection, cracks, defective valves or failed pressure switch. Leaks will cause the pump to keep on sucking in air, therefore, keeps on cycling. To fix this problem you need to examine all your connections and pipes for leaks.

2. My RV Water Pump Sound Like It’s Running But I Have No Water?  There’s a little bit of troubleshooting that goes into addressing a problem like this.

1) First, let’s make sure that there is actually water in your freshwater tank. I know this seems really obvious, but it’s an easy thing to forget.  Check the tank gauge. If your tank is empty, or even just low, your RV water pump will not work. (It needs something to pump!)

2) If your freshwater tank is reasonably full, you should then check the water lines for loose connections, leaks, or splits. If you’ve recently replaced or repaired something near the water line, it might have gotten kinked.
3) Now you need to decide if there is water flowing to the pump. Start by carefully loosening the water line to the pump. If you disconnect it and discover water in the line you know water is traveling toward the pump, which is good news. Reconnect the line. If the water line seems dry, then the issue is the actual water line coming to the pump from the tank.
Check to see if there is any type of blockage or tube damage. Now re-establish suction by refilling the water line with water. Connect it again with the pump and turn the pump back on to see if the water begins to move toward the faucets. This could take a couple minutes to be sure the faucets are fully open and have someone watch for the outpour.
4) If there is water in the line, then chances are pretty good that the problem is the water pump itself. If you’re handy, you can sometimes repair a compromised component.
A more serious problem will likely require you to completely replace the RV’s water pump.

3. If your RV water pump won’t stop running, you have to change the low battery or fix the broken check valve. You would also need to clean the clogged strainer and the pump head diaphragm. If the pump still won’t shut off, then most probably, the pump pressure switch is the problem. You can’t changed out this component, so you either buy a new pump or a new pump head.

1) The first thing you have to check when your RV water pump won’t stop running is its battery. Check the volt connections at the fuse panel and be sure to upgrade to two new 6 volt batteries. Also, you have to install a digital voltage meter in the trailer while doing this.

2) If you’ve changed the battery and the pump continues to run, you probably have leakage from a broken check valve. As a result, instead of stopping the water pump, it will tell the pump to keep pumping causing the fresh water tank to rise.

3) Clean the Clogged Strainer. Most new RV’s are not equipped with a strainer, but this is a component that you need to have. A strainer blocks trash from entering the fresh water tank, the plumbing lines and the pump head. Your RV water pump won’t stop running once the strainer is clogged.

4) A pump head diaphragm is equipped with two valves: one for suction and one for delivery. One of the elements of this pump is the O-rings, which creates a watertight seal between the valve and the pump head. The RV water pump won’t shut off if the pump head starts to get clogged up. So, be sure to clean the Pump Head Diaphragm regularly.

5) If the pump still won’t shut off after cleaning the pump head, then the pump pressure switch is the problem. This component is responsible for activating and turning off the water pump. Pump pressure switch is not manually operated by the owner, but controlled with the water pressure. That means you can’t changed this out, so you either buy a new pump or a new pump head.