I have a question about the setting on the defrost timer on a Goodman 18 SEER 2 stage heatpump with resistance aux heat. This is a new unit just installed Friday so I am still in the learning mode.
The factory defrost setting is 30 minutes. The actual time is somewhat dependent on the running timer and the temperature sensor on the outdoor coil. If I read the manual correctly, the defrost is initiated by the timer reaching 30 minutes, and the outdoor coil being 28* or lower.
In a moderate climate, like Southern Delaware, is 30 minutes a realistic time, or should it be 60 minutes ( or 90 minutes ) which is one of the options in the setup procedure? How much frost will collect on the coils during operation?
Any rules of thumb as to how to judge the proper timer interval? -- The difference between genius and stupidity is that genius has its limits.