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4 Reasons Why Your HVAC Unit is Overheating

February 23rd, 2021 by Emily Mixter

4 Reasons Why Your HVAC Unit is Overheating

You likely use your HVAC unit throughout the week to maintain a comfortable temperature in the building, whether it’s the middle of winter or you’re in a heatwave. Over time, some issues can start to occur with the system if it doesn’t get the necessary attention or care it needs. If the HVAC unit starts to overheat, there are a few common causes of the issue to investigate to ensure you can hire a technician to perform the necessary repairs.

1. Dirty Air Filters

Clogged air filters are among the most common reasons HVAC systems start to overheat and fail. Homeowners often forget to replace the filter, which can lead to a lack of airflow and cause the parts to work hard to operate each time you heat or cool the interior setting. It’s important to replace or clean the air filters every two months, depending on how frequently the system is used each season.

2. Dirty Coils

If you’ve failed to get your HVAC system proper maintenance every year, then it can cause the parts to become dirty and fail to work properly. Dirty coils covered in grime can prevent the parts from releasing enough heat, which causes the appliance to work too hard to operate and eventually overheat.

Enough ventilation should prevent the coils from having issues to reduce the risk of overheating. One of the most common signs this is the cause of the HVAC system overheating is if you notice the appliance has difficulty cooling the home.

3. Refrigerant Leaks

HVAC units are known to overheat if there’s not enough refrigerant present. The refrigerant is responsible for cooling down the appliance but doesn’t do its job if a leak is present. Avoid attempting to repair the leak without a technician’s help to avoid accidents that can occur. A technician will know how to find the leak and perform the necessary repairs to restore the appliance’s operation.

4. Grimy Blades

The blades may also accumulate too much dirt and grime if they aren’t wiped down every few months. The blades can have difficulty moving if they’re covered in gunk, which causes the HVAC system to work too hard to run. If your HVAC system is struggling to operate, you can expect it to overheat eventually. Cleaning the parts and wiping everything down at least every six months is crucial to maintaining the parts and avoiding costly repairs.


Contact us today to learn more about why your HVAC unit is overheating and having a technician inspect the parts to diagnose the issue.