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dtzackus's avatar
dtzackus
Explorer
Jul 17, 2014

Air Condition high/low question

Hi, we have the 13,500 btu with ducted a/c. On my thermostat I have a low and a high setting on both auto and on.

This past trip, we set it on high and felt the same air pressure and coldness coming out of the vents. After doing some site seeing, we noticed the a/c wasn't blowing out the same amount of air. I set it back down to low, which it seemed to be blowing at and then back up to high, I heard something feel like it wanted to kick on, but didn't. Luckily, it was cool that night and the low fan did work for cooling down the unit.

Not sure if I froze up the fan, or something else. Any one have any suggestions?

Thanks in advance.

13 Replies

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  • Fishinghat's avatar
    Fishinghat
    Explorer II
    Jul 17, 2014
    It primarily depends on humidity. Air conditioners have two functions, remove moisture from the air and cool the air. If the unit won't cycle because it is too hot or too much moisture is in the air, then the accumulated moisture freezes on the cools reducing the amount of air that can pass thru. The unit normally turns itself off to defrost the coils, called cycling.

    So, leave the fan on high until the rig is cooled down and much of the moisture has been removed. You may have to leave the temperature turned up (warmer) to allow the unit to cycle. Then you could turn the fan down to low. Listen for the unit to cycle. If it doesn't cycle, then turn the temperature up until it cycles on a regular basis and/or leave the fan on high.
  • helperzack's avatar
    helperzack
    Explorer
    Jul 17, 2014
    Our AC's also have the hi/low switch. When we purchased our unit new, during the walk through the guy told us that most times running on low will make the unit freeze up. He suggested not using low, so I have never used it.

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