Geothermal System Maintenance in Blanchester, OH

How It Works

Our Geothermal Maintenance Process: Specialized Care for Ground-Source Systems

Geothermal maintenance is systematic and specialized. We follow a detailed protocol designed to verify loop health, test both heating and cooling capacity, and catch problems early.

1. 1

   System Status Check & Loop Circulation Verification

   We visually inspect the indoor unit, outdoor/loop connections, backup heating elements, and thermostat. We verify the loop pump is running, measure supply and return line temperatures with an infrared thermometer, and check for leaks or debris — revealing immediate issues fast.

2. 2

   Measure Entering Water Temperature & Loop Performance

   We measure the temperature of water entering the system from the ground loop — typically 45–60°F in summer and 35–50°F in winter. A temperature that’s too warm or too cold signals poor circulation, blockage, or degradation. We compare to baseline data to spot trends.

3. 3

   Refrigerant Pressure Testing in Both Modes

   Using a digital manifold, we measure high- and low-side pressures against geothermal design specs for your model. Low pressures indicate a leak; high pressures indicate blockage or degradation. We test in both heating and cooling modes to verify full-system performance.

4. 4

   Calculate Superheat & Subcooling for Charge Verification

   Superheat and subcooling measurements verify refrigerant charge is correct and the expansion device is functioning. If superheat is off-spec, we investigate whether the charge is low, the metering device has a problem, or the loop is compromised. Precision prevents misdiagnosis.

5. 5

   Loop Supply & Return Temperature Differential

   We measure supply and return temperatures and calculate the difference. A healthy system shows 5–10°F in cooling and 5–15°F in heating. A small differential signals poor circulation or high load; tracking this over years tells us if loop capacity is declining.

6. 6

   Electrical System & Backup Heater Testing

   We measure current draw on the compressor and blower, test the contactor, capacitor, and thermostat accuracy. Critically, we test backup heater activation: does the element or second stage activate at the correct temperature? We catch a failed backup heater before cold weather arrives.

7. 7

   Desuperheater & Domestic Hot Water Loop (if applicable)

   Many geothermal systems include a desuperheater that preheats domestic water using compressor heat. If your system has this, we verify flow, temperature, and check-valve operation, and recommend repair or replacement if performance is degrading.

8. 8

   Coil Cleanliness & Airflow Testing

   We measure indoor coil cleanliness and airflow across the coil. If airflow is weak, we diagnose the cause — a clogged filter, blocked ductwork, or struggling blower motor — and recommend ductwork sealing or coil cleaning as needed.

9. 9

   Ground Loop Pump & Circulation System Check

   We verify the ground loop pump is running, measure discharge pressure, and check for leaks at connections. Loop pump failure is catastrophic — without circulation the system can’t exchange heat with the ground. We catch pump degradation early and recommend replacement before failure.

10. 10

    Document Findings & Create Maintenance History

    You receive a written report with loop temperatures, refrigerant pressures, electrical current measurements, and observations. We note trends and recommend next-visit focus areas and seasonal adjustments if needed.