I was called to a home to perform a routine maintenance check on a central heating and air conditioning system. Upon arrival, I found that the blower wheel was not turning properly. I pulled the blower wheel and found that it was caked with dirt and debris. I cleaned the blower wheel and replaced the motor brushes. I also checked the air filter and found that it was dirty. I cleaned the air filter and replaced it with a new one. I also checked the thermostat and found that it was not working properly. I replaced the thermostat and tested the system to ensure that it was working properly. I also checked the ductwork for any leaks and found that there were no leaks. I also checked the electrical connections and found that they were all secure. I tested the system to ensure that it was operating at peak efficiency. I also provided the homeowner with a maintenance checklist to help them maintain their system in the future.
