Came out for a membership heating tune up checked everything indoor and out as this is a heat pump everything appears to be operating within manufacturer's specifications my only concern is indoor air quality did find some biological growth in the indoor supply plenum brought this to the homeowner's attention as well as offered an Innovative new option for longevity of the system as we are approaching 6 years of life now and knowing the issues we've had with manufacturers and warranty parts we just want to make sure that we're offering preventative options ahead of time this being a soft start device unfortunately the homeowner did not take any recommendations today he is waiting for the email to come through so that he can discuss these options with his wife thank you for choosing comfort experts!