Performed heat check on one heat pump system. Checked all electrical, mechanical and performance of the system. Cleared and treated the drain line and washed the outdoor condenser coil. I replaced the filter with one supplied by the homeowner. After performing tune up I reset the breaker/disconnect at the condenser and found that the breaker had failed and was not passing power to the condenser. I replaced the breaker with a pull out disconnect box at no charge to the homeowner. I cycled power and confirmed the system is working at this time. No other issues were found.