
Installing an Atwood thermostat electric hot water heater in an RV involves several key steps. First, ensure the RV is parked on a level surface and disconnected from any power sources for safety. Locate the hot water heater compartment, typically found in an exterior storage area or under a cabinet. Remove any protective covering or insulation to access the heater. Next, identify the electrical connections and water inlet/outlet pipes. It's crucial to match the new thermostat's wiring to the existing setup, so take note of the color coding and configuration. Remove the old thermostat, if present, and securely mount the new Atwood thermostat in place, ensuring proper alignment and fit. Reconnect the electrical wires and water pipes, making sure all connections are tight and leak-free. Finally, replace any protective coverings, turn on the power, and test the new thermostat to ensure it's functioning correctly and heating the water as expected.
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What You'll Learn
- Preparation: Gather tools, ensure power off, locate water heater and thermostat
- Removal of Old Thermostat: Disconnect wires, unscrew old thermostat, remove from wall
- Installation of New Thermostat: Align new thermostat, secure with screws, connect wires as per diagram
- Configuring the Thermostat: Set temperature, program schedules, adjust settings for optimal performance
- Testing and Maintenance: Verify heating, check for leaks, schedule regular maintenance checks

Preparation: Gather tools, ensure power off, locate water heater and thermostat
Before beginning the installation of an Atwood thermostat on an electric hot water heater in an RV, it is crucial to gather all necessary tools and ensure safety. Start by assembling a toolkit that includes a screwdriver, wire cutters, electrical tape, and a voltage tester. These tools will be essential for the various steps involved in the installation process. Next, verify that the power to the water heater is turned off to prevent any electrical hazards during the installation. This can typically be done by switching off the circuit breaker or unplugging the unit, depending on the RV's electrical setup.
Locate the water heater and thermostat within the RV. The water heater is usually found in a dedicated compartment or closet, while the thermostat may be mounted on a wall or integrated into a control panel. Familiarize yourself with the layout and connections of both components to ensure a smooth installation process. Take note of any specific wiring configurations or mounting requirements that may be unique to your RV model.
Once you have gathered your tools and located the necessary components, it is important to double-check all safety precautions. Ensure that the power is indeed off and that there are no leaks or other hazards present. If you are unsure about any aspect of the installation process, consult the manufacturer's instructions or seek assistance from a professional.
In addition to the technical aspects of the installation, consider the practical implications of the thermostat's placement. Choose a location that is easily accessible and convenient for adjusting temperature settings. Ensure that the thermostat is mounted securely and that all wiring is properly insulated and protected from potential damage.
By taking the time to thoroughly prepare and familiarize yourself with the installation process, you can help ensure a successful and safe outcome. Remember to always prioritize safety and follow the manufacturer's guidelines to avoid any complications or risks during the installation of your Atwood thermostat on an electric hot water heater in your RV.
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Removal of Old Thermostat: Disconnect wires, unscrew old thermostat, remove from wall
Before beginning the removal process, ensure that the power to the water heater is turned off at the circuit breaker to prevent any electrical hazards. Locate the old thermostat on the wall near the water heater and carefully examine the wiring connections. Take note of the wire colors and their corresponding terminals, as this information will be crucial when installing the new thermostat.
Using a screwdriver, gently loosen and remove the screws that secure the old thermostat to the wall. Be cautious not to damage the wall or the wiring during this process. Once the screws are removed, carefully pull the thermostat away from the wall, ensuring that the wires are not strained or pulled excessively.
Next, disconnect the wires from the old thermostat by unscrewing the terminal screws and releasing the wires. It is essential to handle the wires with care to avoid any damage or fraying. After the wires are disconnected, completely remove the old thermostat from the wall and set it aside.
Inspect the wall for any damage or irregularities where the new thermostat will be installed. If necessary, make any repairs or adjustments to ensure a secure and proper fit for the new device. Clean the area around the mounting location to remove any debris or dust that could interfere with the installation process.
In summary, the removal of the old thermostat involves turning off the power, examining the wiring, unscrewing the thermostat from the wall, disconnecting the wires, and setting the old device aside. It is crucial to handle the wiring with care and inspect the wall for any necessary repairs before proceeding with the installation of the new thermostat.
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$29.04

Installation of New Thermostat: Align new thermostat, secure with screws, connect wires as per diagram
Begin the installation process by ensuring the power to the water heater is turned off at the circuit breaker to prevent any electrical hazards. Remove the old thermostat by unscrewing it from the mounting plate. Be cautious not to damage the wiring.
Next, align the new thermostat with the mounting plate, ensuring that it fits properly and is level. Secure the thermostat in place using the provided screws, tightening them firmly but not over-tightening, which could damage the unit.
Refer to the wiring diagram provided with the new thermostat to connect the wires correctly. Typically, the wiring will include connections for the power supply, the heating element, and the temperature sensor. Ensure each wire is securely fastened to its corresponding terminal, and double-check the connections against the diagram to avoid any errors.
Once the wiring is complete, turn the power back on at the circuit breaker. Test the new thermostat by adjusting the temperature setting and verifying that the heating element activates as expected. Monitor the thermostat's performance over the next few days to ensure it is functioning correctly and maintaining the desired water temperature.
Remember to dispose of the old thermostat properly, following local regulations for electronic waste. If you encounter any issues during the installation process or if the new thermostat does not function as expected, consult the manufacturer's instructions or contact a professional for assistance.
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Configuring the Thermostat: Set temperature, program schedules, adjust settings for optimal performance
To configure the thermostat for optimal performance, begin by setting the desired temperature. This can typically be done by using the up and down arrows on the thermostat's display. Ensure that the temperature is set to a comfortable level for your specific needs. Next, program the thermostat's schedule to match your daily routine. This can be done by selecting the appropriate time slots and adjusting the temperature settings for each. For example, you may want to set the temperature to a lower level during the night when you are sleeping, and then increase it in the morning when you wake up.
Once the temperature and schedule have been set, adjust the thermostat's settings for optimal performance. This may include setting the thermostat to "auto" mode, which will allow it to automatically adjust the temperature based on the programmed schedule. Additionally, you may want to adjust the thermostat's sensitivity settings to ensure that it accurately detects changes in temperature.
It is also important to regularly check and clean the thermostat to ensure that it is functioning properly. This can be done by removing the thermostat's cover and gently wiping the interior with a soft cloth. Be sure to avoid using any harsh chemicals or abrasive materials that could damage the thermostat's components.
In conclusion, configuring the thermostat for optimal performance involves setting the desired temperature, programming the schedule, adjusting the settings, and regularly maintaining the device. By following these steps, you can ensure that your thermostat is working efficiently and effectively to provide you with a comfortable living environment.
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Testing and Maintenance: Verify heating, check for leaks, schedule regular maintenance checks
After installing the Atwood thermostat electric hot water heater in your RV, it's crucial to perform a series of tests and maintenance checks to ensure its proper functioning and longevity. Begin by verifying that the heating element is working correctly. This can be done by setting the thermostat to a high temperature and allowing the heater to run for a few minutes. If the water does not heat up, you may need to check the electrical connections or the heating element itself for any signs of damage or malfunction.
Next, inspect the water heater for any leaks. Even a small leak can lead to significant water damage in an RV, so it's essential to catch this issue early. Check all the connections, including the inlet and outlet pipes, the pressure relief valve, and the drain valve. If you find any leaks, tighten the connections or replace the damaged parts as necessary.
Regular maintenance is key to keeping your water heater in good condition. Schedule routine checks every few months to ensure that the thermostat is accurate, the heating element is functioning efficiently, and there are no signs of corrosion or wear. During these checks, it's also a good idea to flush the water heater to remove any sediment buildup that could affect its performance.
In addition to these specific maintenance tasks, it's important to be aware of the general safety precautions when working with electric water heaters. Always turn off the power to the heater before performing any maintenance or repairs, and never attempt to work on the heater if you're not confident in your abilities. By following these guidelines and staying vigilant about the condition of your water heater, you can help ensure a safe and comfortable RV experience.
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