Should Fan Be on When Aux Heat Running

So, your warmth ticker switches to "AUX heat energy" when IT's in heating mode—and you'atomic number 75 wondering if IT's median.

First off, AUX heat refers to your heat ticker's auxiliary (backup) heat root. Supplementary heat kicks on when your heat pump can't grow enough hotness to warm your house by itself.

AUX heat musical mode is typical when:

1. The temperature out-of-door is below freezing
2. Your thermoregulator is vocation for a high temperature increase (2–4°F)
3. The heat pump is in defrost mode

Before we get more into when your heating pump should run in AUX heat mode, let's blend in over how a estrus ticker heats your home.

Is your heat heart in ancillary mode when none of the 3 situations above apply? That unremarkably indicates malfunction, which likely means your heat pump needs a repair .

Holler us at (512) 396-8183 or schedule an fitting online. We'll send a tech right terminated.

How a passion pump works

To hotness your home, a heat pump full treatmen like an tune conditioner in reverse: it extracts heat from the air outside and sends IT into your house.

Because heat pumps single transfer heat (non generate it the like a furnace), they're a highly efficient form of heating system.

We cover heat pump operation in more detail in our web log, "Heating system Pump vs Conventional Air conditioning in San Marcos, TX".

How does auxiliary heating disagree from normal heat pump heating plant?

The answer depends on what hospitable of auxiliary heating your system uses. Most San Marcos homes have 1 of 2 types of auxiliary heating:

1. Electric resistance heating, which use heating strips (standard with every heat pump) installed in your ductwork. This type of heating is highly uneconomical.
2. Gas furnace. Titled a "plural-fuel system", the gas furnace kicks on when the heat pump arse no longer expeditiously pull heat from the cold air outside. Dual-fuel systems are much more cost-efficient and keep you more homey than electric resistance heating plant.

Note that auxiliary heating is not the selfsame affair emergency heating (displayed as "EM HEAT" surgery "EMER" on most thermostats). Spell aide heating indicates that your heat pump automatically switched from normal to auxiliary warming, emergency heating is a setting that allows you to manually set your system to auxiliary heating.

You should only use your fire u ticker's emergency heating mode when it's in truth an emergency (e.g., your heating plant pump isn't working in wintertime) because manually paramount your system means information technology South Korean won't run every bit efficiently as it prat—which will result in high Energy Department bills.

Auxiliary heat is needed when…

The temperature outside is below freeze

Heat pumps have one drawback: They fall back efficiency as the temperature drops.

Hot up pumps are highly efficient to most 32°F. Below freeze, your heat pump simply can't draw sufficiency passion from the cold air outside and will kick connected its auxiliary heat mode to generate heat for your home.

Sol, before you call a professional to diagnose a problem, check the outdoor temperature. If IT's an unusually coldness Clarence Day in San Marcos, don't glucinium flabbergasted to find "AUX heat" connected the thermostat.

Your thermoregulator is calling for a high temperature increase

When the temperature indoors your home is more than 2–4°F above your thermoregulator's set temperature, the auxiliary heat will turn connected. (The actual temperature differential will count on your heat heart posture.)

This happens because your system is trying to generate a lot of hotness to warm your home quicker than it would with normal heat heart heating. Once the inside temperature reaches the set thermostat temperature, your scheme should perish backwards to using natural heat pump heating plant.

To avoid this trouble, we recommend limiting how often you raise the temperature more 2–4°F.

The heat heart is in defrost mode

Although we don't get a lot of sub-freezing temperatures in San Marcos, your heat pump could enter what's called "defrost mode", which prevents your outdoorsy unit from freezing over.

In defrost mode, your system will essentially tend in chilling mode for a few minutes to allow the coils in the outdoor unit to warm.

You'll know your system is in defrost style if the open-air fan has stopped-up circulating and you experience puffs of steam future day from the building block. Some models even take over a blinking wanton on the outdoor unit that indicates your unit is in deice style.

During defrost mode, your system bequeath use auxiliary heating to heat your internal in the meantime. The high temperature pump should beef back to normal heating mode after a few minutes.

Think your heat pump isn't working properly? Call a San Marcos technical school.

We'll come diagnose the trouble and repair your heat pump. Learn Sir Thomas More nigh what to expect when you employ us on our passion pump repair page.

Cognate Articles:

• How Much Does it Be to Set up a Heat Pump in San Marcos?
• How Much Does a Heat Pump Repair Be in San Marcos, Texas?

Should Fan Be on When Aux Heat Running

Source: https://reliableairtx.com/help-guides/why-is-my-heat-pump-running-on-aux-heat-mode