The switch within the kit may overheat due to an internal fault; this could result in melting or charring. It could lead to a fire or electric shock.
What to do...
Stop using the product and contact the supplier for a replacement.
The recalled switches were manufactured in Australia but were sold exclusively in New Zealand between June 2017 and January 2018 as part of a HWS770/2WE hot water connection kit (HWS770/2WE).