Why does AUX heat keeps coming on?

The AUX heat setting on an HVAC unit usually turns on when you need heat fast. If this secondary heating system is constantly running, it may mean that the weather outside is very cold or that the thermostat is set higher than normal. It’s also possible that a part of the heat pump is malfunctioning.

At what temp should I use AUX heat?

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.

Can I turn off auxiliary heat?

It’s, unfortunately, not possible to manually shut off auxiliary heat. But it only turns on when your home needs warmth fast. So if you don’t let the temperature drop quickly in your house, it won’t come on. That’s why the best strategy for solving this problem is to focus on regulating the temperature in your home.

Does aux heat mean something is wrong?

Is AUX heat bad? The short answer is no. In fact, aux heat is a critical mechanism that keeps your heat pump properly running when the outdoor temperature drops. Since this type of unit doesn’t work the same as a furnace, it can get cold.

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.

Is auxiliary heat more expensive?

It will vary depending upon your energy provider, but typically auxiliary heat is up to 50% more costly than conventional heat. Auxiliary heat is different from your average heat source because instead of using a heating pump, it uses heating strips.

How long should my AUX heat run?

The auxiliary heat should only run for as long as it usually takes for your home to meet the temperature set on the thermostat.

Does AUX heat use more electricity?

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.

Why is my auxiliary heat blowing cold air?

Heat Pumps
They also use auxiliary heat strips if the outside temperature is extremely cold. If these strips malfunction, the heat pump will blow cold air. Just like in the summer, the system requires the proper level of refrigerant. If the level is low, the heat pump cannot transfer heat efficiently.

How do I fix my auxiliary heat?

The best way to troubleshoot auxiliary heat is by checking the supply and return air vents. If these are blocked, then this could lead to a lack of heating from your auxiliary unit. You should also check the filters in the furnace and clean them out if they’re dirty.

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 Stage 2 auxiliary heat?

Two-stage heating means the furnace has two levels of heat output: high for cold winter days and low for milder days. Since the low setting is adequate to meet household heating demands 80% of the time, a two-stage unit runs for longer periods and provides more even heat distribution.

Is AUX heat emergency heat?

What Are Auxiliary Heat & Emergency Heat? Auxiliary Heat – This is the secondary heat source that turns on automatically. Emergency Heat – This is when you turn on the secondary heat source.

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.

What does Stage 1 and 2 mean on my thermostat?

The second stage is the full capacity of your system. 1/3 compressor capacity is the 1st stage. 1st stage is more efficient than 2nd stage, but systems are designed to use both stages, so no worries there. It’s fine for your system to have long run times when it’s cold outside.

How do I know if I have 1 or 2 stage heating?

How to identify your heating/cooling system? To know whether you have a single-stage or multi-stage system, check the number of wires leading into different terminals of the thermostat. A multi-stage system will have lots of wires to the thermostat whereas a single-stage system has only a maximum of two wires.

How do I know if I have two stage heating?

Identifying a multistage system

  • 2-stage conventional heating will have wires leading into the W1 and W2 terminals.
  • 3-stage conventional heating will have wires leading into the W1, W2, and W3 terminals.
  • 2-stage conventional cooling will have wires leading into the Y1 and Y2 terminals.