According to the company website’s FAQs, under ‘features,’ on their website, https://www.luxebidet.com/faq/, it is supposed to do this. I copied and pasted the question and answer directly from there:
“Can the Neo 250 or 320 work with cold water only?”
“Yes. To use our hot water bidets with cold water only, use the provided hot water inlet cap and washer. The cap can be screwed onto the hot water inlet”
I hope this helps. Good luck!!!