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.
Jack_in_VA Premium join:2007-11-26 Mathews, VA kudos:1
Temperature, Humidity and dew point are much more important than time. Mine only defrosts every now and then and the outside air conditions are usually bad.
If your coil is 28 degrees for 30 minutes the unit needs to take corrective action which is a defrost cycle.
I don't know what my time is as I don't really want change something that's not a problem.
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