HVAC Repair near Blackhawk. I received a call from a homeowner who reported that their heat pump was not heating their home. Upon inspection, I found that the defrost control board had failed and needed to be replaced. I also found that the air filter was clogged and needed to be replaced. After replacing the defrost control board and filter, I tested the system to ensure it was heating properly. The homeowner was pleased with my work and relieved to have a warm home again.