I performed a heating tune-up over the system. I made sure to rinse out the heat pump outside. During my evaluation I discovered the following: the indoor blower capacitor and outdoor heat pump capacitor are getting weak and out of spec, the blower motor is leaking oil, the condenser fan motor is leaking oil, the contactor is pitted and charred, and the blower wheel is dirty. I brought all of this to the attention of the homeowners and wrote up a list. They elected to only renew their maintenance plan today. I informed them about all of my concerns and also ballparked replacement systems.