This past winter my Bryant heat pump was working fine, then one night the blower motor would not shut off. Had to trip the breakers to get the blower to stop. The outside fan would come on for heat, but not for cool now that it is warm and I need cooling, the unit will not blow cold air. The thermostat has been set to cool, the plenum blower will run continuously, but the outside fan does not come on. What are the possible causes and remedies for this situation.