How to Operate the Water Heater on an RV

The hot water heater on an RV is small, typically holding only 6 to 10 gallons. Much like a domestic water heater, water in the holding tank is heated first before traveling to the hot water tap. Most water heaters use propane to heat the water, but there also are units with an electric element that operates on 120 Volt AC. RV hot water heaters are fairly straightforward to operate.

Instructions

1. Check to make sure there is ample fresh water available in your RV's holding tank. Never turn on a hot water heater with insufficient water, it could damage the appliance.

2. Open the hot water heater bypass valve, if present, to allow fresh water to fill the hot water tank. When running a water heater for the first time, open the hot water tap in the sink and allow the unheated water from the hot water line to flow until it no longer spits. This removes any air bubbles from the line.

3. Start the hot water heater by switching it to the on position if it is equipped with an automatic direct spark ignition system. This uses an electric spark to light the hot water heater. If no DSI system is present, you will need to light the pilot light by hand by following the instructions for your hot water heater.

4. Allow the water to heat up. Plan ahead when showering or using hot water by turning on the hot water heater 10 to 15 minutes before you need it. Many RVers turn off their hot water heater when they don't need it to save on propane. It also is safe to leave this contained system on. In this situation the heater will automatically turn on to keep the water heated to a set temperature so it is always ready for use.

5. Turn the hot water heater switch off for DSI systems or turn off the pilot light for manual systems before travel. Water can stay in the hot water heater in transit and only needs to be drained for winterizing or long-term storage of the RV.

Tips & Warnings

• If you are not getting any hot water, start by checking the level in your fresh water tank and your propane tank.

References

• RV Basics: RV Water Heater Basics