Why does my thermostat say aux heat on?

Why does my thermostat say aux heat on?

When you see the “aux” heat indicator on your thermostat it means your heat pump needed some help reaching the desired temperature. It turns on automatically when the temperature falls about two degrees below the desired setting and turns off automatically when the target temperature is reached.

What does it mean when a Honeywell thermostat says auxiliary heat?

Aux Ht or Auxiliary heat is the backup heat that turns on to help the compressor for first stage maintain your temperature setting. When the thermostat is in this position the compressor does not run, only the Emergency heat runs.

What is the AUX terminal on a thermostat?

Auxiliary heat is used when the balance point can no longer efficiently transfer heat from the outside air (usually about 35 degrees Fahrenheit). A thermostat senses this and automatically turns on electric heat strips to provide the additional heat needed. Some thermostats have an E wire.

What temp should AUX heat come on?

Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. This is when the outside is around 35-40 degrees and the indoor temperature is around three degrees cooler than the thermostat setting.

How do you turn off AUX heat?

Shut the door and close the vents so that the rest of the warm air can be redirected to the rest of your home. If the temperatures are extremely frigid outside, even this may be too much for your unit. You may need to make some additional changes to your home to keep the auxiliary heat from coming on.

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.

Is it bad if auxiliary heat comes on?

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.

What is auxiliary heat?

Auxiliary heat on your thermostat refers to your backup heating system within your heat pump, otherwise known as electric resistance heating. This is because when the temperature inside your home drops below the goal temperature you’ve set the thermostat to, your thermostat energizes auxiliary heat.

What wire controls auxiliary heat?

W2 wire
If you have a heat pump, the W2 wire may control your auxiliary heat. Auxiliary heat helps heat your home when it’s too cold outside outside for your heat pump to work efficiently. In some heat pump systems, the W2 wire may control a separate furnace to help heat your home.

Can you turn AUX heat off?

When the temperature inside your home drops a certain amount below the goal temperature (usually 1.5-2 degrees), your thermostat energizes auxiliary heat. The aux heat indicator on your thermostat lets you know when this is happening. Aux heat will turn off once your home reaches the thermostat set point.

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 is AUX 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’s the switch on an old weathertron thermostat?

Also, be careful with the old WeatherTron thermostat since it contains a mercury switch. Mercury is highly toxic and you don’t ever want to be in contact with it. Thermostat with cooling, regular heat and emergency heat. The old WeatherTron thermostat had a switch to toggle between “AUX.” auxillary and “EMERG.” emergency heat.

Why does my thermostat say ” aux heat “?

If the “AUX” signal shows all the time when it’s not freezing outside, you need to contact a professional HVAC technician to fix your heat pump. We’ll explain how a heat pump works and why it needs that backup heat source.

What did I replace my Trane thermostat with?

I replaced my old Trane WeatherTron thermostat with a new Honeywell programmable model to help save with the electricity and fuel bills. The old WeatherTron was also really ugly.