Ecotec VU Flow Switch 0020039708
Vaillant 0020039708 Flow Switch
Suitable for the following Vaillant boilers:
Vaillant Ecotec VU GB 656/4-5 2007-2015
Vaillant Ecotec VU GB 656/4-5 A 2015-2018
- The flow switch acts as a safety device.
- It is a switch with an in-built sensor that sits in the pipework for both the heating and domestic hot water systems.
- When the pump is activated, the flow switches senses this movement and feeds the information back to the electronic control, allowing the ignition sequence to progress.
- The purpose of the flow switch is to make sure that the burner cannot switch on if the system is low on water or dry.
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