The performance and efficiency of your air conditioner is at it’s best when the refrigerant is at it’s manufacturer’s specification.  If your air conditioner is low on refrigerant it will affect how well your house is cooled.  It can either just be low on refrigerant or possibly have a leak.  A technician can fix any leak, test the line and charge the system with the correct amount of refrigerant. Call a trained air conditioning repair Denver technician who can diagnose the problem and do any repairs needed.