AC Fan On or Auto – Which is best?
Today we dig a little deeper to tackle the dilemma, AC Fan On or Auto – Which is best? All single-stage air conditioning systems come with two operation modes: AUTO and ON. Single-stage means the air conditioner either runs at 100% capacity or not at all. In this case, you may have been advised to keep your thermostat set to AUTO instead of ON. But is there really a difference?
AC Fan On or Auto – Which is best? Let’s start with what AUTO and ON mean.
Your AC has a blower motor inside that is controlled by the fan setting. The purpose of the blower is to distribute cool air throughout the ductwork into all your rooms.
When the fan is set to AUTO:
This means your AC fan runs in cycles to keep your home cool. When the temperature reaches the thermostat set point, it automatically shuts off. As your home begins to heat back up, your thermostat reads a higher temperature. Therefore, it communicates to the air conditioner to kick back on for another cooling cycle.
When the fan is set to ON:
This means the fan runs continuously blowing air even when your AC system isn’t cooling.
We recommend the AUTO setting. Here’s why.
AC Fan On or Auto – Which is best? Save money with the AUTO setting.
Since the AUTO setting runs in cooling cycles, there are times when the fan is completely off. Therefore, your monthly utility bills will be lower because your fan is using less energy.
Experience less wear and tear.
In the ON position, your AC must work harder to remove excess moisture from the air and keep it cool. This may lead to repairing and replacing parts or possibly the motor itself sooner than necessary. In contrast, there’s less stress on the blower when using the AUTO mode. In this case, your system gets breaks and has time to “sweat” out that excess moisture build-up, allowing it work more efficiently and last longer.
Greater dehumidification keeps you comfy.
You know those windows and doors you keep meaning to seal properly? Well, that unfinished business can cause a significant humidity issue in your home. In fact, hot air seeps in wherever it can find a way – doors, windows, fireplaces, ventilation fans, leaky ducts, etc. If left in the ON position, your AC fan captures this unconditioned air and blows it back into your home. As a result, the humidity level in your home rises and you feel clammy and uncomfortable.
In some cases, mildew growth can collect on supply registers and air ducts with high humidity levels, which can aggravate respiratory ailments.
In summary, we recommend setting your thermostat to the AUTO position for the best balance of energy efficiency and comfort. How can we help you? Sunset Air and Home Services is committed to helping you make the best decisions for you and your family. Need advice? Contact us, 239-693-9005. Financing plans available.
