How can you straighten a clock with warped wooden frame?

Don't know if this would work, but try putting the clock in the bathroom, and turning on the hot water really hot. Let it run to steam up the room and keep the door closed the whole time so the steam will build up in the room. Leave the clock in the room with a lot of weight on top of it (books, etc) to weight it down. Hopefully the steam will relax the wood and the weight of the books will help it flatten out again.

Perfect solution from Michele. That's what I would suggest. Love the steam idea. Should work if the wood is not warped beyond repair.

Just to add a little bit to what Michele said, when you do this keep the door closed until the room is back to normal temperature. Then open the door to let out the humid air. You're also goin to leave the clock there until it is completely dry. Or put a piece of board underneath, then start the process. You could then move it to a drier place, but please make sure the weight is still on the top until everything is completely dry. BTW, this may or may not work I've done it in the past and sometimes I've had success, but sometimes, not so much. Wiahing you the best.

Not sure what happened to Michele solution, I don’t see it here now? But if that solution don’t work? You can try a couple other solutions maybe if I’n Not mentioning hers?

you can try just dampening the back side of your clock arms, don’t take much dampness at all usually. You can sit them in the sun with the damp side up assuming that the warp would be where it would rock like a hobby horse? Which you want that side on the ground and other side damp! Let sit in the sun to dry and will usually straighten a board. Being a woodworker it’s one of the tricks we do from time to time! If there’s no sun or cold and rainy, you can use a iron on a damp rag and again set your clock arm where it would rock like a hobby horse on your ironing board and lay the damp rag over the arm and sit a hot iron on it to let it steam a second or two! Don’t leave the iron on it long. You can always do it again adding more time. Put a little heat to it then inspect it to see if the bow is any better Or straight now? If not straight try heat a little longer! Note: this may raise the grain a bit on the back side of your clock arms and you may need to lightly sand afterward if it presents any problem being a little rough?