[clayton]

I have a carrier heat pump. Yesterday morning it ran fine in the cooling mode. Last night I noticed it was getting warm in the house so I went to see what was going on. The t-stat screen was blank. I made sure I had voltage and I pulled the fuse and it was blown. I put a new one in and the unit came on for a minute and blew again. I disconnected the tstat and connected red and green and I my fan came on so I connected the yellow for the contactor and It blew again. I changed the contactor and the problem is still happening. I looked at the wiring diagram and I believe it goes to a humidifier relay I have no idea how to test it. Any suggestion would be greatly appreciated.

Clayton