Carrier furnace model #58MVB...
Keeps blowing the 3 amp fuse (code 24). Second time in 3 days. The first time I moved the AC 1 button to the right setting on the circuit board. Fuse stopped blowing. Then the thermostat had a hard time turning on.. seemed like a loose connection, but I finally got it to connect and worked.

3 days late I woke up and realized the fuse popped again. Code 24 again. Unplugged the thermostat connection in the circuit board and the humidifier. Fuse still pops.

Any idea what I can try next?

Thank You,
Anthony