Was working on a semi truck trailer today Driver told me heard air coming from Driver side. I slide underneath I find that one of the brake chambers are just bleeding through on the passenger rear axle so not thinking anything of it because we needed to move the trailer to get into the shop. I put a caging bolt in the chamber and went to go move it none of the breaks are released. Had more than enough air pressure in the truck was sitting for probably a week so I’m like OK. The shoes are frozen