Is there anything else that could be causing the same error? The motor controller is expensive so I don’t want to buy the wrong thing and waste a lot of money.
In this thread http://www.ukwhitegoods.co.uk/modules.p … pic&t=6501
alexa says that the cold valve is proportional and indicates that the hot valve isn’t. On the packaging for 420148 it states it is a proportional valve.