Heat Pump Maintenance & Tune-Ups in Greers Ferry, AR

Comprehensive System Inspection in Both Heating and Cooling Modes

Heat pump maintenance isn't a single-mode check—we test your system's complete operation. Our technician begins with a full visual inspection: outdoor condenser, indoor air handler, all refrigerant lines and connections, electrical connections, thermostat, and ductwork. Then we power on the system and run diagnostics in both heating and cooling modes plus the defrost cycle. This dual-mode assessment reveals problems that would hide in a single-mode test. We measure refrigerant pressure on both high and low sides in heating mode, then switch to cooling mode and re-measure; we calculate superheat and subcooling values in both modes to verify refrigerant charge is at design specifications; we test the reversing valve solenoid to confirm it energizes smoothly when the thermostat switches between heating and cooling; we verify the defrost sensor accurately detects outdoor temperature and triggers the defrost cycle appropriately; we check compressor electrical current draw in both heating and cooling; we verify all thermostat signals are reaching the heat pump control board correctly; we test all safety controls; and we assess the overall condition of visible components.

Indoor and Outdoor Coil Cleaning

Dust, pollen, pet hair, and debris accumulate on both coils during months of heating and cooling operation. A dirty indoor evaporator coil blocks airflow and reduces your system's ability to exchange heat efficiently, forcing it to run longer and harder. A dirty outdoor condenser coil reduces heat rejection in cooling mode and heat absorption in heating mode. We clean both coils with coil-safe cleaners and specialized equipment, restoring airflow and heat transfer efficiency so your system runs cooler in summer and warmer in winter with less energy consumption. We remove debris from the outdoor condenser coil fins, safely clean the indoor evaporator coil, inspect coils for corrosion or physical damage, verify airflow is fully restored, inspect and clear the condensate drain line, and apply biocide treatment to the condensate drain pan to prevent microbial growth and odors.

Electrical Connections, Capacitors, and Safety Control Verification

Electrical connections loosen slightly over time due to thermal cycling and vibration. Loose connections generate heat, reduce current flow, and can trigger safety shutdowns. We inspect and tighten all major electrical terminals on the compressor, fan motors, contactor, capacitor, and disconnect switch. We test capacitors—they store electrical charge to start the compressor and fan motors—and replace any showing degraded performance. We verify all safety controls respond correctly and reset properly after a shutdown. We inspect all terminal connections for corrosion or looseness, test capacitor capacitance with a multimeter, verify the contactor closes and opens smoothly, test the high-pressure cutout and low-pressure switch, inspect the disconnect switch, and verify the compressor's internal thermal protection.

Reversing Valve and Defrost Cycle Testing

The reversing valve is the heart of heat pump operation—it reverses refrigerant flow to switch between heating and cooling modes. The defrost control is the guardian of cold-weather performance—it melts ice that builds on the outdoor coil during winter operation. We test both with precision. We energize the reversing valve solenoid and listen for a clear click—that click confirms the valve is responding electrically. We observe the system switching from heating to cooling mode and back, confirming the reversing valve is actually reversing flow. On a fall tune-up, we test the defrost sensor and thermostat to confirm they'll trigger properly when outdoor temperature drops and ice begins forming. We measure temperature drop and rise in refrigerant lines to confirm actual flow reversal, verify the defrost timer cycles appropriately, and confirm the system exits the defrost cycle smoothly and resumes normal operation.

Refrigerant Charge Assessment and Final Performance Testing

Heat pumps demand precise refrigerant charge in both heating and cooling modes. Undercharged systems won't extract heat efficiently from cold outdoor air in winter or reject heat efficiently in summer. Overcharged systems overpressurize and damage the compressor. We measure the system's superheat and subcooling and compare them against design specifications. If charge is slightly low but no active leak exists, we document it and recommend monitoring. If a slow leak is evident, we can locate it and schedule repair. We then run a complete performance cycle test in both heating and cooling modes to verify everything is working together. We use an electronic leak detector to scan connections and lines, run a full heating cycle and a full cooling cycle to verify the system reaches and maintains your set temperature, confirm all rooms are heating and cooling evenly, provide you with a detailed written report, explain what we found, and schedule your next maintenance visit while discussing maintenance plan benefits.