Trap running nonstop top to bottom all car calls latched no doors. Should have tried to troubleshoot more before resetting and checking Ibm relays. Now cannot duplicate. Any one seen this before thanks

Were u getting do and dc at floors that's where I d start.had a solid state doing that and found bad R1 in doors and that fixed the see-saw

Check nA1/nA2 and nR relays sometimes a back contact is bad and doesn't cancel calls.

Replace LR relay