Posted by 2 years ago. This is set at a default 35F (1.7C), so the heatpump will not be used when the weather outside is below 35 degrees Fahrenheit and only aux heat will be used in this case. 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. There … If utilizing a fossil fuel auxiliary heat system, set to Gas or Oil Furnace. I have a Lennox unit and my ecobee4 asked me if I wanted to allow the heat pump and auxiliary to run simultaneously? This applies to a heat pump with electric back up heat. Meanwhile the heat pump has been running non-stop throughout this time to maximize the cheap heat. Most “smart thermostats” are also designed to work with common heat pump configurations. As we mentioned above, heat pumps absorb heat from the outdoor air and then move that heat indoors. Electricity is inherently less energy efficient than running the HP. Switching to the emergency heat setting forces your heat pump to bypass the method it typically uses to produce warm air and instead rely solely on heat produced by the heat strip coils. You might notice your heat pump runs constantly in cold weather. Pumped heat. They also support several stages of heating and cooling and can run the heat pump and auxiliary heat simultaneously to maximize comfort and reduce overall energy costs. I chose disable because it sounds safer. It’s normal for your heat pump to switch to AUX heat when…...The temperature outside is below 35° Usually, once outdoor temperatures fall below 35°, a heat pump will struggle to keep your home warm and will automatically switch to AUX heat. Before you call for service, make sure the heat pump isn’t accidentally set to a/c mode, and that the set temperature is correctly set at the thermostat. They will work in tandem when the temperatures drop to those cold numbers. Your auxiliary heat supplements your heat pump’s heat––it doesn’t replace it. NO HEAT – The space temperature drops more than 3 degrees below the thermostat's heating setpoint.. It is the ratio of heat produced to the amount of energy required to run the system. Your thermostat is calling for a high temperature increase (2–4°F) The heat pump is in defrost mode. However, when the outside temperature is 32° F or below, your auxiliary heat will usually turn on automatically. Close. Components – Coils, Heaters, Motors, etc. For example, if you live in an area with long, cold winters, a heat pump will run more than in temperate climates. EM heat is NOT the same thing as AUX heat: AUX heat signifies that your heat pump has automatically switched over to backup heating because temperatures are too low. If YOU want change, YOU have to first change. Prolonged use of aux heat can cause your … Allow heat pump and auxiliary to run simultaneously? Once it gets close to the actual setpoint, the aux heat de-energizes and the heat pump mode of the system remains operating to generate heat and will shut off if the temperature is satisfied. Our 20th year anniversary is May 21, 2020. Post photos, respond to polls and access other special features. Auxiliary heat can handle more extreme temperatures since it uses electric heat strips. It’s possible that, if the weather is especially cold, your heat pump could run near-constantly without there being an issue. A heat pump has two stages of heat. Auxiliary heat kicks on when your heat pump can’t produce enough heat to warm your home by itself. Typically, your heat pump will energize the auxiliary heat strip inside your secondary heating source to help reach its set temperature more quickly. Heat pump running constantly. That's why it is called auxiliary heat it supplements the primary heat. The compressor is what drives … Another reason you may see the auxiliary/emergency heat come on is when it is unusually cold outside for an extended time. A heat pump is usually powered by electricity, although there are heat pumps that run on natural gas, propane, or even solar or geothermal heated water but those are not found in residential use. Some heat pumps also have auxiliary heat, an additional stage of heating that is typically used when the heat pump compressor can’t keep up with cold weather conditions. This is because your outdoor heat pump will have a more difficult time creating enough warm air to heat your home. For better energy efficiency and comfort, change this setting to “Run heat pump and auxiliary heat simultaneously.” This way your auxiliary heat will supplement your heat pump rather than replacing it when the temperatures drop outside. The auxiliary heat pump should run more often when the temperatures outside dip below freezing. 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