I performed 2 heating maintenances on 2015 90% gas systems. I checked amps, filters, electrical, drains, cleanliness, and safeties. During my evaluation, I discovered that the system for the main part of the house has a failing capacitor on the inducer motor. This will cause the unit to stop heating when it fully goes out. I noticed that the equipment does not have surge protection, and I advise performing a drain treatment to ensure the drains are good because 90% gas systems produce water when heating.