On 19 Jul 2006 17:12:28 -0700, "Peachy"
wrote:

I recently replace the Honeywell thermostat for my Coleman heat pump,
with a Hunter digital and after I got it installed I notice that the
package said in very small type that it was not suitable for heat
pumps. It seems to work, so I'm wondering what the difference is. Do i
need to get a different one?

yes. That thermostat probably doesn't have the needed back heat stage.