Why is aux heat coming on?

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.

What does AUX on AC mean?

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.

How do I know if my auxiliary heat is on?

Here’s how you can tell: It says so on your thermostat: The next time temperatures plummet, take a look at your thermostat. If the display says “AUX,” this means your heat pump is in auxiliary mode.

Is auxiliary heat more expensive?

As we mentioned above, AUX heat usually costs up to 50% more than heat transfer, which means if your system is running on AUX heat when it shouldn’t be, your heating bill is likely going to be a lot higher than you’d like it to be. Our suggestion would be to reach out to a professional as soon as possible.

Why is my thermostat flashing AUX heat?

If your aux heat indicator is on, it means your heat pump needs a little help reaching its target temperature setting. Aux heat comes from the same heat source as emergency heat, but aux heat works together with your heat pump, so it’s less expensive than emergency heat.

How do I stop my auxiliary heat from coming on?

Tips for Avoiding AUX Heat Issues

  1. Schedule preventative maintenance every six months.
  2. Clean the areas around the outdoor HVAC unit regularly.
  3. Keep ducts and heat vents free of clutter.
  4. Don’t use the emergency heating setting for normal heating.
  5. Clean or replace the heat pump filter every month or two.

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.

What is the difference between heat and AUX heat?

Auxiliary heat uses electric resistance heating, which is much less efficient than your heat pump. Therefore, a heating system stuck in AUX heat will run up an energy bill. If you have a heat pump, it is best to increase your heat setting by only two degrees at a time to prevent your auxiliary heat from operating.

Is auxiliary heat necessary?

Auxiliary heat is an essential component of a heat pump system when the heat pump can’t warm the house on its own. An auxiliary heating unit wouldn’t be a very sustainable option by itself, but when the heat pump and auxiliary system work together, the homeowner gets the best benefits of both.

What does it mean when my Honeywell thermostat says AUX heat?

Aux Ht or Auxiliary heat is the backup heat that turns on to help the compressor for first stage maintain your temperature setting. You know if the auxiliary heat is running when you see “Aux Heat On” in the thermostat’s display. During this time both your Auxiliary heat and your compressor may be on at the same time.