Cali Coils are rigorously tested and assembled at our facility in northern California. We use the best possible components which are desinged here in the good ol U.S.A.. As the saying goes... "$%@# HAPPENS!!" so all Cali Coil units are covered by a manufacturers warranty as well a Cali Coil 1 year warranty on anything inside the unit. Unfortunately heating coils cannot be covered under said warranty. But if you did purchase your unit from us we will be happy so extend a bigger discount on your replacement coil.