Have you just sanded your yard ? Sometimes sand will get in and mess with it , take it out and clean it . when you install it back rotate it manually with your hand back and forth to help it clean out .
Nestor's Sprinklers & Lighting
Alpharetta,Ga.
770-410-9356
www.GeorgiaLighting.net
Vincent Nestor
Nestor's Sprinklers & Lighting
Alpharetta,Ga.30022
vpn1@bellsouth.net
www.NestorsLandScape.com
www.GeorgiaLighting.net