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Allenville
Charleston
Mon - Fri: 7:30AM - 5:00PM
24/7 Emergency Service
24/7 Emergency Service
Geothermal System Not Cooling? Troubleshooting Tips
Before you book a service call, it’s a good idea to check for a few common issues that might keep your geothermal system from cooling properly. Many of these are quick fixes you can take care of yourself, saving money and avoiding an unnecessary repair visit. Try these steps if you’re in Mattoon, Charleston, Effingham, or anywhere across East Central Illinois.
1. Check thermostat settings
Confirm your thermostat is set to a temperature lower than the current room temperature. The system mode should be on COOL (or AUTO for automatic cycling). For the fan, select ON for continuous circulation or AUTO to run only when the geothermal system operates. Lower the thermostat to its coldest setting to test if the unit starts.
2. Inspect the air filter
If airflow feels weak or restricted, the air filter may be clogged. Replace or clean the filter to restore proper airflow.
3. Make sure registers and vents are clear
Check around your home to ensure all vents and registers are open and not blocked by rugs, curtains, or furniture.
4. Verify the power disconnects
Both the indoor and outdoor portions of your geothermal system have power switches nearby. Ensure both are turned on.
5. Check your breaker panel
Look at your home’s electrical panel to make sure breakers for the indoor and outdoor units are ON. Reset any that may have tripped.
If your geothermal system still isn’t cooling after these steps, it’s time to call the professionals. At Atteberry & Marshall, we provide expert geothermal cooling repair and service throughout Mattoon, Charleston, Effingham, and East Central Illinois.
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