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Hello, if there is a fuse in the 24v circuit it is an automotive type, with a 3 or a 5 on it, in the printed circuit board... that changes sometimes between model years... it could be a few inches from the 24v transformer in one of the 24v wires attached to the transformer.
If you can send me a photo of the printed circuit board and the transformer area I can spot it for you. I may need you to send me a photo of the wiring diagram later as well (that one needs to be close up, taken straight on, well focused and in very good light.)
Use the paper clip icon to attach photo's, we can go from there without a time limit as long as you approve of my approach and rate positively.