heat pump thermostat Archives - Advanced Heating & Air Conditioning

"It's smart, so it'll work" isn't how heat-pump thermostats go. The thermostat has to control the reversing valve, staging, aux/emergency heat and sometimes communicating equipment

Heat pump thermostat displaying AUX HEAT in a Temecula Valley home during winter heating

October 6, 2026

Heat PumpsHeatingHomeowner Guides

by Advanced Heating

Auxiliary Heat vs. Emergency Heat on a Heat Pump

Saw AUX HEAT or EM HEAT on your thermostat? They're related but not the same. Here's what auxiliary and emergency heat each do, when they're normal, why they can spike your electri

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