I am a skilled professional that works for a Dor-Mar Heating & Air Conditioning company. I recently completed a job at a residential home in the city. The customer had been experiencing issues with their heating and air conditioning system. I arrived at the home and performed a thorough inspection of the system. I checked the sequence system and found that it was not running as it should. I replaced the faulty sequence system and tested the system to ensure it was running as it should. I also checked the air filters and found that they were dirty and needed to be replaced. I replaced the air filters and tested the system again to ensure it was running as it should. The customer was very satisfied with the work I performed and expressed that they would recommend my company to others.