Replaced Thermostat - Blows A/C Fuse

[mdhuds]

Black Coleman-Mach, I replaced with white Honeywell RTH221B, and is blowing a/c fuse, when turned to Heat position. Works great in A/C position. I have included pictures of wiring on old one, and new one. Anyone know why the fuse would be blowing??? Thanks!

 

[jimtoo]

Hopefully someone will jump in soon with some info for you. You will need to make a couple more post before the system will allow you to post pictures.

Jim M