The Vision Pectron controller (part No. 900467) has now been replaced by the Pactrol Controller (part No. 2015-KIT) (https://www.reznor.co.uk/product/pactrol-controller/).
Is there a replacement for the Vision Pekron 900467 controller?
Looking to upgrade your old heater? Look here for information on which product is the best like-for-like replacement.