I am troubleshooting a hydro Otis elevator 4 landings. When the elevator first went down, I found that the 3C coil was fried. I replaced that and now I can't get my 3C to latch. All my other relays latch (1U, 1D, 1C etc) except 3C. Even my 3D and 3U latch, but when any call is latched it stays latched and the elevator goes to the floor and the door stays open. The only way to get the doors to close is to manually open the latched relay. Does anyone have any suggestions? My 2nd floor car button works fine, I checked that. We've checked other coils, cleaned contacts and checked wiring, I just don't know what we're missing. Any idea's would greatly be appreciated.