Replaced and cleaned filters. Cleaned drains, flame sensors and inducer ports. Checked all operations. Basement system could fail at anytime, because of weak dual capacitor. Valve core started to stick and leak. I was able to unstick valve core and install brass caps. Indoor air quality can help get rid of plastic odor in basement and purify air. Helps keep systems clean. Home owner was running late for a meeting and I was not able to go through IAQ and duct work cleaning. Pictures and estimates in email.