Have new breckwell pellet stove, have tried different thermostats with it, none of them will work with stove.is there a special thermostat I should be using.

Does the pellet stove have a fan center or other type of control for the blower fan to get a signal from?

Most house hold thermostats use a 24 volt signal from the furnace to work and are actually a fancy temp sensitive switch. The breckwell stove requires a thermostat that uses a milivolt signal to control the stove. I can't remember the exact value but any dealer or parts supplier can tell you what it is. They are available a lot of places online for $50 to $100 for a wall type or about $250 for a remote type. Once you have the specs any local heating supply house or installer should be able to get you one. Hope this helps I ran into the same problem when I installed my multi fuel p6000 stove 3 years ago.Also I have found that the fire brick panel and the stir rod are good for about two years. The cost of replacement is about $120.Also about once a year you will have to partially dissemble the stove and clean all the ash out of the passages inside the stove.