What sort of fuse should I install in my Irrigation Controller? Matt W 13 March 2020 04:58 Follow HOLMAN Irrigation Controllers use a 5mm × 20mm 1 amp glass fuse These are available at most of our retailers Related articles Why does the fuse keep blowing in my Irrigation Controller? Why won't my Irrigation Controller start automatically? Why is my Irrigation Controller watering more than one station or zone at the same time? When are my watering days? How do I connect my Garden Light Controller to Holman Home? Comments 0 comments Please sign in to leave a comment.