Please view the fault finding guide on page 52-53 within the Vision VS Radiant installation manual (https://www.reznor.co.uk/wp-content/uploads/2025/06/Reznor-VS-Radiant-Installation-Manual-EN-Aug-24-D301031-Issue-K.pdf) for more information.
Why isn't my radiant tube firing or running?
Information on Reznor's range of radiant heating systems