Dover composite 2 car group. car a is down hall calls car b is up hall calls. On car A hall call stays lit when it goes to the floor. Car B will not drop u1
or u2. If I bump uc in manually it opens door and does what it should. Went through all relays both controllers. Any ideas why my up car won't drop u1 and u2? Thanks...

Fixed! Problem was bad uc relay base on car A.

Great, the coil pins of the socket usually get bent up, if the relays are not pulled out correctly. always pull the relays straight out, i have fixed quite a few of these for people who are relay swapping, and pry the relays out, it pushes the pins up in the socket. just a little advice for the young guys out there,