What does AUX heat mean on Carrier thermostat?
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What does AUX heat mean on Carrier thermostat?
auxiliary heat
“Aux” is short for auxiliary heat. If a heat pump is having a difficult time coming up to a certain temperature quickly due to extremely cold outdoor temperatures, the “aux heat” indicator means that a secondary heat source (generally gas or electric) has been deployed.
What temp should AUX heat come on?
Your auxiliary heat should turn on when the outdoor temps are near 30° Fahrenheit and below. This temperature is when your air-source heat pump struggles to obtain enough heat from the outside air to warm your house. Therefore, when the temperature is below 30 degrees, AUX heat is needed to supplement your heat pump.
How do I stop my auxiliary heat from coming on?
Tips for Avoiding AUX Heat Issues
- Schedule preventative maintenance every six months.
- Clean the areas around the outdoor HVAC unit regularly.
- Keep ducts and heat vents free of clutter.
- Don’t use the emergency heating setting for normal heating.
- Clean or replace the heat pump filter every month or two.
Is it normal for AUX heat to come on?
First off, AUX heat refers to your heat pump’s auxiliary (backup) heat source. Auxiliary heat kicks on when your heat pump can’t produce enough heat to warm your home by itself. AUX heat mode is normal when: The temperature outside is below freezing.
How long should auxiliary heat run?
The manufacturer advises keeping the minimum on time to 300 seconds to prevent the system from short cycling.
Is AUX heat the same as emergency heat?
Auxiliary heating turns on automatically to help heat your home more quickly if the temperature drops suddenly. The emergency heat setting has to be manually switched on and should only be used in temperatures below 30 degrees.
How often should AUX heat come on?
When should my auxiliary heat come on? When outside temperatures drop below 40 degrees. While undergoing the defrost cycle. When there is a 3 degree difference or more in the current temperature in your home and the thermostat setting.
Why does my heat pump run on auxiliary heat?
Aux heat will kick on when your heat pump cannot deliver enough warmth to heat your home. Typically, your heat pump will energize the auxiliary heat strip inside your secondary heating source to help reach its set temperature faster.
Why is my heat pump always on auxiliary heat?
Why Is My Heat Pump Auxiliary Heat Always On? Typically, your heat pump will tag in auxiliary heat when outdoor temps drop below 35°F, your heat pump is set to the defrost setting, or you’re attempting to heat your home by 3°F or more at a time.
What happens if auxiliary heat runs too long?
What happens if auxiliary heat runs too long? An Aux heat system running for too long will only affect your utility bills. It will not affect the performance of your HVAC system.
Why is my auxiliary heat running too long?
If your auxiliary heat operates for an unusually long time, you have a problem with your heat pump. Your auxiliary turns on because the indoor temperature thermostat is struggling to reach and maintain its set temperature. So, when auxiliary heat stays on, you can be certain the heat pump is malfunctioning.
Should heat pump and AUX heat run simultaneously?
The system is designed so that both can operate simultaneously. As long as the HP is producing some heat, it’s more efficient to use the HP for whatever Btu’s you can garner and allow the aux heat to be just that, auxiliary rather than primary.
How long does auxiliary heat last?
Auxiliary heat only turns on when your home needs warmth fast. It should only remain on for as long as it takes your home to reach the temperature on your thermostat. What is this? This shouldn’t take much longer than 30 minutes.
How long is too long for AUX heat?
If the auxiliary heat runs every time you turn your system on, or it runs for an unusual amount of time, such as longer than 30 minutes, all day, or does not turn off, you should have your system evaluated by an HVAC pro.
