How Do You Reset an RV Hot Water Heater? Keeping Your Showers Warm on the Road
Want your RV hot water back? This guide shows how to safely and effectively reset your RV hot water heater, restoring your access to warm showers and comfortable washing facilities while on the road.
Understanding Your RV Hot Water Heater
RV hot water heaters are essential for comfortable travel, providing the convenience of hot water on demand. They come in two primary types: propane (LP gas), electric, or a combination of both. Knowing the type of system you have is crucial because the reset procedure can vary.
Why Would You Need to Reset Your RV Hot Water Heater?
A reset is often necessary when the hot water heater’s high-temperature limit switch trips. This switch is a safety device designed to shut down the heater if it overheats, preventing damage and potential fire hazards. Overheating can occur due to several reasons, including:
- Low water levels in the tank.
- A faulty thermostat.
- Clogged burner (in propane models).
- A malfunctioning control board.
The Reset Process: Step-by-Step
Here’s a general step-by-step guide on how do you reset an RV hot water heater:
- Safety First: Turn off the hot water heater. If it’s electric, disconnect the power at the breaker. If it uses propane, turn off the propane supply valve.
- Locate the High-Temperature Limit Switch: This is usually found behind an access panel on the exterior of the RV, often near the top of the hot water heater. It’s typically a small, rectangular box with two buttons, a reset button and a test button. Some models have a single button that serves both functions.
- Inspect for Issues: Before resetting, try to determine the cause of the trip. Check the water level in the tank (if possible) and ensure there are no obvious leaks or damage.
- Reset the Switch: Press the reset button firmly. You might hear a faint click.
- Restore Power/Propane: Carefully turn the electricity back on at the breaker or reopen the propane supply valve.
- Test the System: Turn on a hot water faucet and allow the water to run for a few minutes. Monitor the heater for proper operation.
- Monitor: Keep an eye on the heater for any signs of malfunction or repeated trips of the high-temperature limit switch. If the problem persists, it’s best to consult a qualified RV technician.
Important Safety Precautions
- Never attempt to reset the hot water heater if there is a gas leak.
- Ensure the tank is completely full of water before turning on the heater, especially after draining it for winterization.
- If you are uncomfortable working with electricity or propane, seek professional assistance.
Common Mistakes to Avoid
- Resetting without investigating the cause: Repeatedly resetting a heater that keeps tripping the limit switch can mask a more serious problem and potentially lead to damage or fire.
- Ignoring leaks: Leaks can lead to water damage and indicate a problem with the tank or plumbing.
- Running the heater dry: This can cause the heating element (in electric models) to burn out or damage the tank in both propane and electric models.
Troubleshooting: When the Reset Doesn’t Work
If resetting the hot water heater doesn’t restore hot water, consider these possibilities:
- Faulty Limit Switch: The limit switch itself may be defective and need replacement.
- Faulty Thermostat: The thermostat controls the water temperature and may be failing to regulate it correctly.
- Heating Element Failure: In electric models, the heating element can burn out.
- Control Board Issues: The control board manages the heater’s functions and can sometimes malfunction.
- Propane Issues (Propane Models): Check the propane supply, burner, and gas valve.
When to Call a Professional
If you’ve tried resetting the hot water heater and troubleshooting common issues, but the problem persists, it’s time to call a qualified RV technician. They have the expertise and tools to diagnose and repair more complex issues safely.
How Do You Reset an RV Hot Water Heater? Understanding the Different Types of Heaters
The reset procedure and location of the reset button can vary slightly depending on the manufacturer and model of your RV hot water heater. Refer to your owner’s manual for specific instructions. Common brands include Suburban and Atwood (now Dometic).
| Feature | Suburban | Atwood (Dometic) |
|---|---|---|
| Tank Material | Porcelain-lined steel | Aluminum |
| Reset Location | Typically behind an exterior access panel | Typically behind an exterior access panel |
| Reset Button Type | Separate test and reset buttons | Single button for both test and reset |
Here are 12 FAQs that address your most common questions about resetting your RV’s hot water heater:
What does it mean when my RV hot water heater keeps tripping?
Repeated tripping of the high-temperature limit switch usually indicates an underlying problem, such as low water levels, a faulty thermostat, or a clogged burner. It’s crucial to investigate and address the root cause rather than just repeatedly resetting the heater.
How do I know if my RV hot water heater is electric or propane?
Check your owner’s manual. Often, you’ll find a switch labeled “Electric Water Heater” inside the RV. If you also have a propane tank and lines running to the water heater, it’s likely a dual fuel model. You can also typically determine this by inspecting the exterior of the hot water heater unit.
Can I run my RV hot water heater on both electric and propane at the same time?
Yes, some RV hot water heaters are designed to run on both electric and propane simultaneously. This can provide faster heating, but it will also consume more energy. Consult your owner’s manual for specific recommendations.
How often should I drain and flush my RV hot water heater?
It’s recommended to drain and flush your RV hot water heater at least once a year, especially after winterization or if you notice sediment buildup. This helps maintain efficiency and prolongs the life of the tank.
What happens if I forget to fill the hot water heater before turning it on?
Running an empty RV hot water heater can cause severe damage. The heating element (in electric models) can burn out almost immediately, and the tank can overheat and warp, even in propane models. Always ensure the tank is full before use.
Where is the bypass valve located on my RV hot water heater?
The bypass valve is typically located near the back of the hot water heater, inside the RV. It allows you to bypass the tank during winterization to prevent freezing.
What is the difference between a Suburban and an Atwood RV hot water heater?
Suburban tanks are generally made of porcelain-lined steel, while Atwood (now Dometic) uses aluminum. This difference in material can affect the unit’s weight, heating speed, and corrosion resistance. See the comparison table earlier in this guide.
How do I winterize my RV hot water heater?
To winterize your RV hot water heater: turn off the heater, drain the tank, bypass the tank, and open the drain plug to allow any remaining water to escape. You may also need to add RV antifreeze to the water lines.
Why does my RV hot water smell like rotten eggs?
A rotten egg smell in your hot water often indicates the presence of sulfur bacteria. This is usually harmless but unpleasant. Flushing the tank with a mixture of water and hydrogen peroxide can help eliminate the bacteria.
How do I clean the burner on my RV propane hot water heater?
To clean the burner, first, turn off the propane supply. Then, remove the burner assembly and carefully clean it with a brush and compressed air. Make sure the burner is free of debris before reassembling.
My hot water heater makes a popping or rumbling noise. What’s wrong?
This noise is usually caused by sediment buildup in the tank. As the water heats, the sediment can bubble and create popping or rumbling sounds. Draining and flushing the tank can usually resolve this issue.
Can I use an anode rod in my RV hot water heater?
Anode rods are primarily used in steel-tank water heaters to prevent corrosion. They are not typically required in aluminum tanks. Check your owner’s manual to determine if your hot water heater requires an anode rod and, if so, replace it regularly (usually annually).