Clark's Tip · Lowering Energy BillsWatch the defrost cycle, not the thermostat
First winter with a new heat pump, you'll see the outdoor unit cycle through periodic defrost - the fan stops, you might see steam, the unit briefly runs in reverse. That's normal and intentional - it's melting frost off the outdoor coil so heat extraction keeps working. Don't panic and don't call us. The thermostat may drop 1-2 degrees during defrost, then recover. If indoor temp drops 5+ degrees and stays low for more than 20 minutes, something's actually wrong - then call.