What size is the fuse on a watermaster/orbit sprinkler timer box? Blinking red
OK I tried some out from home depot and &quot;5mm by 20mm 1A fast burn&quot; was the closest they stock and seemed to work OK for me.
Appears the canonical replacement is &quot;orbit 57003&quot; but they're sometimes tricky to find/more expensive.  Might be able to find some equivalents online as well.