Safely resolving problems with a geothermal heat pump requires that you contact a geothermal professional. Most homeowners lack the expertise to safely address functionality issues, and interfering with this complex system could result in damage, performance problems or loss of efficiency. If you suspect a problem, or your system has stopped working, call your HVAC contractor. These are the common problems the technician will look for.
Improper cooling
A lack of cooled air is often the result of:
- A dirty filter. You can check this component before calling a pro, and replace the filter if it looks dirty.
- Insufficient airflow may also be the result of a dirty filter. If replacing the filter doesn’t help, the technician will check the motors and external static levels.
- Ducts that leak. The air temperature differentials in the return and supply ducts must meet manufacturer’s specifications.
The system won’t cycle on
If the geothermal system doesn’t run, causes may include:
- A drop in refrigerant. The technician will measure the charge, and add more if necessary; if the level is low, he’ll look for leaks.
- A failing reversing valve. After testing its operation, the technician may replace it.
- Thermostat malfunction. Recalibration can resolve the problem.
Humidity problems
If the geothermal system doesn’t properly dehumidify the home in cooling mode, the technician will check:
- The size. If the heat pump is too large for the home’s load, the unit will cycle on and off frequently. To properly dehumidify the home, the system should run longer cycles.
- Airflow volume. Improper airflow leads to poor dehumidification, too. Adjusting the airflow volume at the air handler or the speed of the motor can resolve this issue.
Compressor issues
If the compressor runs, but the evaporator doesn’t, the technician should check:
- The thermostat wiring, ensuring the wires aren’t frayed or damaged, and check the test mode.
- The fan motor, ensuring the voltage is correct and the capacitor is operational.
When your geothermal heat pump acts up, address the problem quickly. Leaving problems unchecked may lead to more significant and costly repairs. Ace Hardware Home Services is happy to help homeowners in the Dayton area with geothermal installations, maintenance and repairs. Call us today to schedule service.
Our goal is to help educate our customers in Dayton, Ohio about energy and home comfort issues (specific to HVAC systems). For more information about geothermal heat pumps and other HVAC topics, download our free Home Comfort Resource guide.
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