Shy et al. 2019 mentioned that ABO typing is usually performed at room temperature.
(Reference: Shy, B. R., Tholpady, A., & Nedelcu, E. G. (2019). Interferences in blood bank testing. In Accurate Results in the Clinical Laboratory (pp. 425-437). Elsevier. DOI: 10.1016/B978-0-12-813776-5.00028-5)