Pundmann ON/OFF Button - For Use With Water Heater Controller

Original Accessory — Built for the WHS77838 Water Heater Controller

This is a genuine original accessory, designed and manufactured specifically for the WH77838 water heater system. Whether you need a replacement part or want to expand your setup, this button gives you complete, reliable control over your water heater — even in your campervan.

Trouble-Free Performance

Once connected, it runs continuously without issue. Thousands of users rely on its simple push-button operation day in, day out — no smartphone required, no complications, just dependable control at your fingertips.

Quick & Easy Installation

A connection cable is included, and the button can be installed in minutes. No specialist tools, no stress — just a straightforward setup so you can get back to what matters.