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There’s hardly a more uncomfortable summertime irony than an air conditioner blowing warm air. Unfortunately, this problem isn’t all that uncommon and can happen to even the best air conditioners. So, if you’re asking yourself, “Why is my air conditioner blowing hot air?” below, we’ll explain the common causes and what to do when it happens.
If you think your air conditioner is beyond repair and are looking for your next device, check out our guide to the best 15000 BTU window air conditioners.
It’s important to note that there is no singular cause for an AC blowing warm or hot air. Instead, there are a few common causes that owners should first check to understand why it’s happening. Sometimes, warm air indicates a minor fix, but other times, the repair costs can be severe.
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As suck, it’s crucial to investigate the cause of your issue immediately, as catching problems early often reduces the severity of the damage. Conversely, sometimes AC unit output is too cold, and AC owners often need to figure out why an AC is spitting out ice.
The first thing to do whenever you feel hot air coming from your air conditioning is to check the thermostat. Make sure it’s set to the desired temperature. And a great way to avoid further issues is to place it on AUTO mode.
If your air conditioning unit is leaking or has low refrigerant levels, it has no way to cool the air that passes through. As a result, the unit will blow hot air.
While it’s always best to contact a professional to help recharge or fix a refrigerant leak, it’s possible to do it yourself. Those looking for guides can find our article explaining what type of freon to use for a home air conditioner.
Never leave any object in the way of your air conditioner vent. Blocking the vents prevents warm air from being removed from the house; this can contribute to AC damage.
Dirty air filters can cause several AC issues, such as why a portable air conditioner is leaking water. A clogged AC filter blocks airflow, preventing the unit from adequately removing warm air and distributing cold air. Always check your filters to make sure they are clean and free of damage.
STAT: Failing to replace your unit’s air filter regularly can decrease overall efficiency by up to 15%. (source)