[Unregistered]

Had a contractor look at my heat pump and said he changed the defrost time to 60 minutes from 90.. I happened to look at board and damned if I could not find the 30-60-90 time set... usually they are by the test terminals... scratching my head here..

 

[Bjd]

Not sure about yours, but the ones I have use little switchs that change the settings.

Bernie