Came out today due to the indoor unit producing a burning smell. Upon inspection of the outdoor system found it is a R 22 that is from 2006. Upon inspection of the indoor system found heat pump that is from 2005. Upon testing the outdoor unit found that the refrigerant charger is good. The contactor is burnt and pitted, but the 24 V coil is OK. The capacitor for the outdoor system is within range. Upon inspection of the indoor system found a lot of biological growth inside of the system. The indoor coil and indoor blower will have lots to build up. Due to the amount of stress and buildup on the blower will cleaning this motor could completely caused this motor to fail. Upon inspection of the blower motor itself, found oil from around the motor, which is indicating that the motor has overheated. Upon testing the blower capacitor found it was bad. After full inspection of the system, found nothing that was burnt or any burning wires. Performed test to ensure that the heat strips were not