Discovering that your Dometic RV water heater is failing to operate on electric can be frustrating, especially when you’re counting on a hot shower after a long day of travel. The convenience of electric heating is a key feature for many RVers, allowing them to conserve propane and enjoy the comforts of home while on the road. Understanding the potential causes behind a dometic rv water heater not working on electric is the first step towards diagnosing and resolving the issue. This guide delves into common problems and practical troubleshooting steps to help you get your hot water flowing again, ensuring a comfortable and enjoyable RV experience. There are several reasons why the dometic rv water heater not working on electric, and we’ll explore the most common ones.

Common Causes and Solutions

1. Tripped Circuit Breaker or Blown Fuse

This is often the simplest and most overlooked cause. A tripped circuit breaker or a blown fuse can cut power to the water heater’s electric element.

• Solution: Locate the circuit breaker panel in your RV and check the breaker for the water heater. If it’s tripped, reset it. Also, check the fuse associated with the water heater and replace it if blown. Remember to use a fuse with the correct amperage rating.

2. Faulty Heating Element

The heating element is responsible for warming the water. Over time, it can burn out or become corroded, preventing it from functioning properly.

• Solution: Use a multimeter to test the heating element for continuity. If there’s no continuity, the element is likely faulty and needs to be replaced. Disconnect the power before testing!

3. High-Temperature Limit Switch

The high-temperature limit switch is a safety device that cuts off power to the heating element if the water temperature gets too high. It can sometimes trip even without an actual overheating issue.

• Solution: Locate the high-temperature limit switch, usually found near the heating element. Press the reset button, if present. If the switch continues to trip, there might be a more serious problem.

4. Thermostat Issues

The thermostat regulates the temperature of the water and controls the heating element. A faulty thermostat can prevent the element from turning on.

• Solution: Use a multimeter to test the thermostat for continuity. If there is no continuity when the thermostat should be calling for heat, the thermostat may need to be replaced. Consider consulting with an RV technician if you’re unsure about this process.

5. Low Voltage

RV parks can sometimes experience low voltage, especially during peak usage times. Low voltage can prevent the water heater from operating correctly.

• Solution: Use a voltmeter to check the voltage at the RV park’s electrical outlet. If the voltage is significantly below 120 volts, consider using a voltage booster or waiting until the voltage stabilizes before using the electric water heater.

Troubleshooting Steps

1. Safety First: Disconnect the RV from shore power before performing any troubleshooting.
2. Visual Inspection: Check for any obvious signs of damage, such as burnt wires or corroded connections.
3. Test the Heating Element: Use a multimeter to test the heating element for continuity.
4. Check the Thermostat: Use a multimeter to test the thermostat for proper function.
5. Inspect the High-Temperature Limit Switch: Look for a reset button and try pressing it.