HVAC Service near Hill Rd. I received a call from a homeowner who reported that their furnace was not blowing hot air. After inspecting the unit, I found that the flame sensor was dirty and needed to be cleaned. I also found that the air filter was clogged and needed to be replaced. After cleaning the flame sensor and replacing the 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.