Note: Ecobee 3 Lite does not have accessory terminals to control whole humidifier, dehumidifier or a ventilator. Therefore, if it’s below 40 outside and the auxiliary heat isn’t working, then your heat pump will just blow lukewarm or cool air. It does seem to be kicking in frequently instead of normal heat and got an alert that my "Aux Heat was running for more than 180 minutes". Note that auxiliary heating is not the same thing emergency heating (displayed as “EM HEAT” or “EMER” on most thermostats). One-stage thermostat that works with gas, oil or electric furnaces, central air conditioners, 2 wire hot water systems, millivolt systems, central heating and cooling systems, and heat pumps without auxiliary/backup heat. Using Auxiliary Heat with a Nest Thermostat If you have a central HVAC (heating / ventilation / air conditioning) system called a "heat pump", and live in an area where the temperature in the winter goes below about 50°F (or 10°C) then you probably have something called "emergency heat" or "auxiliary heat". 7-Day programmability: program each day individually with up to 4 … Electric resistance strip heat. Emergency Heat, also known as “auxiliary heat”, is the second stage of heat that your thermostat runs on when the temperature is too cold for your heat pump to extract heat from the outside. AUX heat turns on to keep you warm. Another situation the auxiliary heat would kick in. As the temperature of the room nears the actual set point of the thermostat, The auxiliary heat will de-energize and will drop out of the circuit leaving only the heat pump operating. Heat Pump Stuck in Aux Heat Mode. If you live in colder states with harsh winters, the outside temperature can mess with your heat pump. If the heat pump ices over, AUX heat will kick in more often, in order to compensate and raise the temperature to the desired levels. I have installed a ritetemp 6036 thermostat,replace the Weathertron (trane heat pump with aux. This model Ecobee 3 Lite is compatible for Heat pumps (2 stages Y1 and Y2) and also for Heat pumps with aux heating (2 stages of aux heat – W1 and W2). Change to the desired value. #3 – Honeywell (RTH9585WF) Heat Pump Smart Thermostat Honeywell RTH9585WF It is unusually cold outside. For those reasons, heat pumps without auxiliary heat tend to be sold in climate zones that occasionally experience very mild winter conditions with temperatures never going below about 35 degrees F. Now I keep on getting alerts that the Aux heat is running. So it relies on an auxiliary (AUX) heat coil (like the ones you see in a toaster) or a furnace to heat your home. Types of AUX heat (and why it matters) Heat pumps have 2 forms of AUX heat: Electric resistance (default) Gas furnace; The electric resistance option is like the electric coils you see inside your toaster. While auxiliary heating indicates that your heat pump automatically switched from normal to auxiliary heating, emergency heating is a setting that allows you to manually set your system to auxiliary heating. Also, the auxiliary heat enabling switch is not included in the wall thermostat that controls that kind of heat pump system. We have a heat pump and recently installed an ecobee thermostat. If your heat pump seems to be stuck on auxiliary heat mode and the temperatures outside are above 35 degrees, you should call the professionals at Precision Heating & Air. The thermostat is set to 70 degrees. Select “Heat Pump”. External Factors That Can Initiate AUX Heat. Emergency Heat is typically triggered when it is 35°F and below outside. Auxiliary heat is less energy-efficient than your heat pump, and it is meant to only run for short periods of time when temperatures drop. ... Why does an air-source heat pump system's heating capacity decrease as the outdoor temperature decreases? the auxtllary hearter seem … heat)the heat pump seem to run a long time. The emergency heat setting on a heat pump thermostat: ... What is the most common form of auxiliary heat used in heat pumps? Once the ice on the heat pump has mostly melted, the heat pump goes back to normal and AUX heat turns off. 4) Auxiliary heat is malfunctioning Below 40 degrees, your heat pump struggles to heat your home.

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