I am unaware of any heater for the a/c side but in the winter on a heat pump if the temp is low enough the heater will kick on to warm the compressor. I don't think there is any reason to worry in the summer other than the 5-10 minute wait for the system to equalize after a power failure or being shut off.

Years ago, most if not all condensers had sump heaters. Not true today. So many people would cut the breaker in the winter to save some electricity. This would prompt the need to turn the breaker back on, if a cool weather startup was anticipated.

If your outdoor temperature has been at 65 degrees or higher, for at least 24 hours, you're good to go.

V

thanks, good to know I am not causing more damage.

Thanks Veesubotee I was not aware of that.