Viessmann boiler error Z3

The error code Z3 indicates a problem with the z3 sensor.

The Z3 sensor monitors the water temperature in the boiler. If this sensor malfunctions, it will result in an error code Z3.

Z1 is the most common sensor to malfunction. Error codes in this category usually result from an obstruction or a dirty water filter.

It is a good thing to know about the error code for your boiler. This way, you are prepared if something goes wrong, and you can fix the issue more quickly.

The error code Z3 on the viessmann boiler indicates a problem with the pump circulation loop.

The error code Z3 signals that you need to replace the water sensor in your boiler.

To determine if you have this error and need to replace the sensor, first identify what type of boiler you have and what type of water sensor it has. Then identify if your red light on the control panel is blinking or not. If your red light is blinking and there’s a beeping sound, then it’s likely that you have this error code Z3 showing up on your boiler because the water sensor needs to be replaced.

Determine which type of water sensors are compatible with my boiler:

-AquaNova jetshot10L high-pressure system

-Viessmann Vitodens 100-WVH high pressure system

-Viessmann Vitodens 200-WVH high pressure system

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