My daughters cars a/c gets cold and then flux between warm and cold. Believe it may be the blend door actuator. If it only has one climate control does that mean I only have one actuator to locate? And would it be in the lower center or pass side of dash? Also if it does sound like the actuator, would it trip the engine light to stay on till fixed? Daughter think its code had something to do with air circulation. Still I have to check code at parts store. Just curious till then. Any help is appreciated.