Emergency Heat must be turned on manually while Nest thermostats can use Auxiliary Heat automatically as needed. In this way, the set temperature will be reached and stabilized. , Emily H, No Comment, June 30, 2016 When you go for shopping a thermostat, you will find some inexpensive yet intriguing products. This happens sometimes when it’s colder than average and on the verge of extreme temperature drop like Nashville experienced this last spring. Heat Mode. However, since heat pumps are dependent on extracting heat from the outside air in the winter months, there is a point at which there simply isn’t enough heat in the air to fully warm a home. The main difference is that the emergency heating mode in heat pumps is activated manually. This section usually has a electric resistance heating coils or finned electric heating elements, but it is also possible to purchase a heat pump with an oil furnace … 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. , Joan, 1 Comment, September 5, 2016 The same mechanism works with so-called emergency heating mode. Unfortunately, using the auxiliary heat is significantly more expensive than using your heat pump. The “AUX Heat” mode is usually an indicator that it’s freezing outside, and your is heat pump is using a secondary backup heat source – your auxiliary heat—to keep your home at your set temperature. At this temperature level, standard heating systems will try to provide just the right amount of even heating to a space or room with the help of the auxiliary heating system. When your heat pump uses its backup auxiliary heat to help it heat your home, you won’t notice. Emerson Sensi Wifi Thermostat. External Factors That Can Initiate AUX Heat. The “AUX Heat” mode is usually an indicator that it's freezing outside, and your is heat pump is using a secondary backup heat source – your auxiliary heat—to keep your home at your set temperature. If the temperature for example is very cold outside a room or house for example, the standard heat output generated by heat pumps may not be enough to provide even heating. In most cases, the temperature for heating can be set at a specific temperature. Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. Auxiliary heat/ Emergency heat help the heat pump keep up when cold outside or the temperature differential on the thermostat is large. Important: Emergency Heat and Auxiliary Heat are different types of backup heating and operate differently. We know you have questions, so below we’ll go into more detail about: In this mode, the heat pump continues extracting as much heat energy as possible, but also adds heat from a secondary source to make up the difference. Reply: Anon, The requirement for backup heat for a heat pump system depends on where you live and what cold weather temperatures you can anticipate. Emergency Heat is just the switch setting that will turn off the heat pump and only run the auxiliary heat. November 19, 2014 I guess the only difference is that AUX is an ‘indicator’ on your thermostat that you are running the heat strips when the switch is set to HEAT. Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. Auxiliary heat is the electric heat strip in your air handler that is supplemental heat. Heat pumps normally have a set temperature for heating and this can be regulated through a thermostat control system. Without the auxiliary heating system, the temperature inside a given room may drop even lower depending on the outside or external temperature. In this particular scenario, auxiliary heating may be needed and automatically activated. Copyright 2020 FindAnyAnswer All rights reserved. Now I keep on getting alerts that the Aux heat is running. What cars have the most expensive catalytic converters? This is typically caused by one of three factors: when it’s below 35° outside, you’re trying to heat your home by 3° or more, or your heat pump is in defrost mode. What is an auxiliary contact on a contactor? If the temperature for example is very cold outside a room or house for example, the standard heat output generated by heat pumps may not be enough to provide even heating. , Comment Closed, September 20, 2016 It may be more effective, but it comes with a specific cost that you might not be anticipating. How do I know if my heat pump is working properly? Change to the desired value. Heat pump systems have two units - one outside the home and one inside the home. The heat pump is getting too cold outside and needs auxiliary to back it up 3. the Heat pump has gone into defrost mode, (cooling) to melt the ice of the outdoor coils. In the store, you will find several thermostats that are helping a heat pump, but not suitable with an aux or emergency heat system. When this happens, the auxiliary heat inside turns on. Why does auxiliary heat come on on a heat pump? Auxiliary heating basically serves as a back-up or secondary source of extra heating when the need arises. Set up Emergency Heat. Emergency heat is the same thing as auxiliary heat. Why Does My Honeywell thermostat say auxiliary heat? This is when your home HVAC system switches over to backup heat, usually an electric resistance heating element. First “Auxiliary Heat”, “Strip Heat”, “Emergency Heat”, “Radiant Heat” are all used to reference the same heating mechanism; your electric heat strips that come with a heat pump. What is the difference between auxiliary heat and emergency heat? Auxiliary Heat. Asked By: Aris Oetges | Last Updated: 4th January, 2020. Shut Down Your AC at the Thermostat. Using a heat pump for cooling and heat down to about 40ºF works well but when the weather gets colder a back up auxiliary system -- preferably gas or oil -- … But, I have come across the best thermostat for heat pump with aux heat, and it is the Emerson Sensi WIFI thermostat.. As the name indicates, it is the Wifi thermostat for heat pumps with auxiliary heat. When this set temperature drops to more than 2 degrees Fahrenheit for example, most heat pumps will then activate the auxiliary heating system. Does the outside unit run when heat is on? Does Hermione die in Harry Potter and the cursed child? then switches over into a defrost operation. When the temperature level detects that more heat is necessary to fill up a certain room or space, the auxiliary heating mechanism will be automatically activated. , cherran , cherran, 2 Comments, The Difference Between Bolsheviks And Soviets, The Difference Between Creationism and Intelligent Design. Note that auxiliary heating is not the same thing emergency heating (displayed as “EM HEAT” or “EMER” on most thermostats). If you live in colder states with harsh winters, the outside temperature can mess with your heat pump. To understand why this is a bad thing, you have to know a little about heating efficiency. This secondary heat source … , Comment Closed, February 7, 2015 Limiting the use of auxiliary heat can be an effective means of saving money. First, systems with auxiliary heat have another section to the air-exchanger plenum right after the interior heat pump condenser. February 9, 2015 To limit auxiliary heat and lower your heating costs, a critical first step is to set a lower indoor temperature. The Auxiliary heat gets automatically turned on by your HVAC system to supplement the heat pump output when your system can’t keep up. Short for auxiliary heat, this system is designed to heat your home up quickly instead of waiting for the cold heat pump on the exterior of your home. As the temperature outside drops and the outside unit loses its ability to provide heat, the thermostat ambient temperature reading drops. Aux heat should only kick on when the heat pump can’t produce enough heat to warm your home on its own. In this mode, the back-up or secondary heat strips will also be activated to provide additional heating when the thermostat detects the dropping of temperature. Auxiliary heat is the electric heat strip in your air handler that is supplemental heat. Heat pumps have auxiliary heat. Aux on the thermostat stands for auxiliary heat. I guess the only difference is that AUX is an 'indicator' on your thermostat that you are running the heat strips when the switch is set to HEAT. This is when the outside is around 35-40 degrees and the indoor temperature is around three degrees cooler than the thermostat setting. , cherran, No Comment, June 25, 2016 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. This is down with a heat pump thermostat. Of course, if your heat pump isn’t performing as described or if it needs servicing, you should call one of our professionals at Adams Heating & Cooling to assess the situation and correct it. One may also ask, why does my thermostat say auxiliary heat? Auxiliary heating basically serves as a back-up or secondary source of extra heating when the need arises. Remember the primary condition; if your heat pump is compatible with aux heat, then only the selection should be like this. Auxiliary heat refers to your heat pump’s backup electric resistance heating. #3 is the most likely answer. Turning your thermostat to “heat” came with an unexpected “AUX” function appearing. The built-in heat strips of the heating pumps or machines will then provide additional heating to the standard heat source. Thinking about purchasing heat pump ..do I need back up. , Joan, 1 Comment, August 28, 2016 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. When a heat pump system with back up heat strips is properly controlled, only the amount of energy necessary to provide heat for the demand is utilized. The “AUX Heat” mode is usually an indicator that it's freezing outside, and your is heat pump is using a secondary backup heat source – your auxiliary heat—to keep your home at your set temperature. Auxiliary Heat. Under normal conditions, heat pumps will run using standard power. , Comment Closed, February 8, 2015 Depending on the ther… During freezing weather, the outdoor heat pump will be too cold to quickly heat your home, which is when the auxiliary heating system would kick on. , cherran How do I stop my auxiliary heat from coming on? When your heat pump can no longer pull the necessary heat from the outdoors, your auxiliary heat will automatically jump in to help. The first step in resetting your AC thermostat is to turn it off at the AC unit. What temperature should I set my heat pump in the winter? EM heat is an option on your thermostat that you can manually turn on to activate backup heating. Exchange the thermostat for one that is heat pump/auxiliary heat compatible. Should I leave my heat pump on all the time? Emergency Heat Indicator only when in Em. Auxiliary heat is automatically activated when there’s not enough outdoor heat. The unit outside your home is a heat pump and the unit inside the home is the auxiliary heating system. RTH111 will only work with a stand alone heat pump and will not work with heat pumps with auxiliary/backup heat. , cherran , Comments Off on What is auxiliary heating? The heat pump runs until it becomes ineffective or freezes. Reset the Circuit Breaker for Your AC Unit. This means your heat pump is still working hard to get that heat, but it just needs a boost, which is where the word supplement comes in. Click to see full answer Correspondingly, what is auxiliary heat on a heat pump? This heat setting should only kick on when the heat pump can’t produce enough heat to warm your home or if your heat pump goes into defrost mode. Auxiliary heating refers to a secondary heating source for various heat pumps or machines that are used during winter time. This happens around -15 to -20 degrees C. Where temperatures dip this low, we recommend that families have a backup heating system In most heat pumps, the auxiliary heating system is activated automatically once the temperature set goes lower than 2 degrees Fahrenheit. AUX heat refers to your heat pump’s “backup” electric resistance heating. Also Know, what temp should AUX heat come on? If it’s 30 degrees outside, it is unreasonable to expect the system to maintain an indoor temperature of 78 without using the heat strips. How to minimize the use of auxiliary heat with a heat-pump on your ecobee thermostat Question: We have a heat pump and recently installed an ecobee thermostat. Select “Heat Pump”. Auxiliary heat/ Emergency heat helps the heat pump keep up when cold outside or the temperature differential on the thermostat is large. 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