Question 1

How to check the anode condition on a CHAFFOTEAUX AQUANEXT PLUS 3079058 water heater?

Accepted Answer

To check the anode condition of your CHAFFOTEAUX AQUANEXT PLUS 3079058 water heater, follow the steps below:

1. Turn off the power supply

Before any intervention, make sure to unplug the water heater or turn off the circuit breaker to ensure your safety.

2. Close the water supply

Locate the water supply valve and close it to prevent any leaks during handling.

3. Drain the water heater

Open a hot water tap to allow air to enter.
Open the drain valve located at the bottom of the water heater to empty the tank.

4. Access the anode

The anode is usually located on the top or side of the water heater and looks like a metal rod.
Remove the cap or cover that protects it.

5. Remove and inspect the anode

Use a suitable wrench to unscrew the anode. It may be difficult to remove if it is corroded.
Examine its condition: if more than 50% of the anode is corroded or if it is very worn, it is advisable to replace it.
A good condition anode has a smooth and shiny surface.

6. Reinstall or replace the anode

If the anode is in good condition, reinstall it and tighten it properly.
Otherwise, install a new anode suitable for your model.

7. Close the water heater

Replace the cap or cover of the anode.
Open the water supply to fill the tank.
Once filled, restore the power supply.

Important: If you are not comfortable with this procedure, it is recommended to call a qualified professional to avoid any risk or damage.

Question 2

How to maintain the CHAFFOTEAUX AQUANEXT PLUS 3079058 water heater?

Accepted Answer

The thermodynamic water heater CHAFFOTEAUX AQUANEXT PLUS 3079058 is equipped with a double anti-corrosion protection system (titanium anode with impressed current + magnesium anode) and a double-level steatite resistance that allows it to operate efficiently in energy class A+ with a coefficient of performance up to 3.35. Regular maintenance is essential to maintain these optimal performances.

Cleaning the evaporator filter
The filter must be cleaned at least once a year to avoid any reduction in performance. To access it, locate the special clip located on the back of the device that allows the filter to be removed. Simply clean it with water and neutral soap, then reinstall it. Also check that the external terminal of the air exhaust duct and the pipes are not blocked or damaged, and that the condensate drain pipe remains free of any obstruction.

Testing and maintaining the safety valve
Test the overpressure device (safety valve) at least once a month to ensure it is not blocked or clogged. Regularly remove any limescale deposits that could obstruct it. This valve is essential to maintain the working pressure at a maximum of 7 bars and ensure the safety of the device.

Descaling the tank
Depending on the hardness of your water, descale the tank and the resistance when it shows signs of clogging (decreased hot water flow, increased heating times). When descaling, use an appropriate descaling product following its technical data sheet, ensure good ventilation in the environment, and use the necessary personal protective equipment. After each descaling intervention, fill the tank and perform a complete drain to eliminate any residual impurities.

Battery management (if bi-hourly power supply)
If your installation benefits from a bi-hourly power supply, the impressed current anode is protected by rechargeable batteries during hours without power. These batteries must be inserted (respecting the polarities) into the special housing of the front cover. They will recharge automatically and ensure protection against corrosion even in case of network malfunction.

Draining the device
A complete drain is essential if the device is to remain unused for a long time or in a location subject to freezing. Proceed as follows: disconnect the device from the electrical network, close the shut-off valve of the safety group, open a hot water tap (sink, bathtub) to depressurize the system, then open the drain tap located on the T-connection of the water inlet and let the water flow out completely.

Important recommendation
Set the water temperature to a maximum of 55°C (the maximum limit in heat pump mode is 62°C). This limit temperature reduces the risk of burns (water above 50°C can cause severe instant burns) and slows down the accumulation of limescale. Any complex maintenance operation, repair, or intervention on the refrigerant circuit must be entrusted to qualified personnel.

Question 3

What should I do if I notice water under my CHAFFOTEAUX AQUANEXT PLUS 3079058 water heater?

Accepted Answer

If you observe water under your CHAFFOTEAUX AQUANEXT PLUS 3079058 water heater, do not worry immediately: a slight leak is quite normal during the heating phase. This water comes from the safety group (pressure relief device) or from condensation drainage. However, it is important to check that the drainage system is functioning properly.

The first step is to check that the drain pipe is not blocked. The safety group must be connected to a drainage pipe installed with a continuous downward slope, placed in a location protected from freezing. A bent, clogged, or poorly positioned pipe prevents water from draining properly and causes water to accumulate under the appliance. Clean the drain pipe and ensure that no sediment or debris is blocking it.

If the water flow occurs only during heating and the drain pipe is clean, this is normal operation of your water heater. Installing an expansion tank on the cold water inlet may reduce this flow if it bothers you.

However, if water flows continuously even after heating has stopped, several causes are possible. Start by turning off the power supply to the appliance for your safety. Then locate the safety group (located at the cold water inlet) and visually check its condition. If leaks come from the pipe connections, you can try to slightly tighten the connection nuts. If the tank itself is leaking, this indicates internal corrosion and requires a prompt call to a professional.

You should also check the water pressure from the network. Excessively high pressure (above 3 bars) causes continuous flow from the safety group. If this is the case, ask a plumber to install a pressure reducer or check the setting of your safety group with a qualified technician.

Important: never block the drainage opening of the safety group. This could damage the appliance and create a hazard. If water is flowing abundantly and regularly, or if you suspect a leak from the tank itself, immediately stop the appliance and contact an authorized CHAFFOTEAUX technician. They will be able to accurately diagnose the problem and carry out the necessary repairs.

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