The RV water pump is designed to provide water flow to the sink, shower and toilet. The water pump is activated by momentarily pressing the water pump switch, generally located in the kitchen, bathroom, and the water service center bay compartment. Operation of the water pump will require 12-Volt DC power supplied by the house batteries. Turn the water pump off when leaving the RV for long periods of time. Prior to engaging the water pump, confirm that there is water in the fresh water holding tank. Attempting to operate the water pump with inadequate fresh water supplies can cause damage to the water pump and associated electrical systems. During winter operations, confirm that water supplies to the RV are not frozen.

If the water pump system ceases to operate, take the time to think through some possible reasons for system malfunction before undertaking to troubleshoot and repair the problem. Start by reviewing when the water pump was last working. Did the water pump system shut down in the morning, around lunchtime, or late in the day? Were you away for a period of time only to return and find that the water pump no longer worked?

Once you pinpoint when the water pump system was last in operation, review any changes that may have occurred since that time. Were any switches or hook ups adjusted? Perhaps you were performing maintenance on another part of the RV and inadvertently moved something out of place. Maybe while working on a separate area of the RV you hit a switch, blew a fuse or loosened a wiring connection that is directly related to the water pump.

Don't be quick to spend money to replace the whole water pump when it could just be a loose connection or a blown fuse.

You may find it necessary to contact Technical Support for specific troubleshooting directions that pertain to your individual make and model RV. In most instances, a DC test light will be necessary for testing of the water pump system. If you feel that troubleshooting and repair of the water pump system is too big an undertaking for your present camping location, or current state of health, have the system inspected and repaired by a qualified RV technician.

If the water pump is not receiving power, inspect the RV electrical system. Confirm that the battery cut-off switch is on, and that there is power to the interior of the RV. If you are dry camping, determine that the house batteries are adequately charged to supply electrical power to the water pump in addition to other items currently operating within the RV.

Located in the water bay are a 10-Amp Latching Controller, 30-Amp 87 relay, and two watertight fuse holders. One watertight fuse holder requires a 5-Amp fuse and the other watertight fuse holder requires a 15-Amp fuse. Both watertight fuse holders will require snapping open the top cover to access the fuse. When the watertight fuse holder is open, and the fuse is exposed, use the DC test light to determine if there is incoming 12-Volt DC power. Place the ground clip to a good chassis ground or use the ground on the latching controller. Place the other probe on the small silver metal stick located on the fuse. Check both sides of the fuse to confirm if power is going through the fuse. If one side of the fuse has power, but the other does not, water pump failure is likely due to a blown fuse. Perform on this procedure on both the 5-Amp and the 15 Amp fuse.

A ten-gauge green wire located at the front run box runs to the water bay compartment, ending at a twisted red electrical wire nut. One of the wires inside of the wire nut may have come loose, or fallen out to prevent power from reaching the watertight fuse holders. Check the red electrical wire nut, located in the water bay near the watertight fuse holders, for proper connection.

When the water pump motor is in operation, but water is not discharging at the faucets or RV toilet, confirm that the fresh water tank is adequately filled and that the contents are not frozen. Inspect the pump inlet strainer for debris.

The City Water/Fresh Tank Fill valve must be in the closed position when operating the RV water pump. As the pump operates, it will build pressure and shut off. If the water pump continues to run, and does not build pressure, the City Water/Fresh Tank Fill valve may not be completely closed off. Failure to securely tighten the valve, or debris stuck in the valve, will cause water from the pump to bypass through the valve and return to the fresh water tank.