Frequently Asked Questions

Not always, but existing ductwork must be tested before assuming it's compatible. Static pressure testing reveals whether your ducts can handle the new system's airflow requirements. Leaky or undersized ducts cause efficiency loss that offsets the performance of even a high-SEER heat pump — duct sealing with mastic or proper tape is often enough to bring older systems up to standard.

Arkansas housing stock spans several decades, meaning square footage alone doesn't determine the right system size. A room-by-room heat gain and heat loss calculation accounts for insulation quality, window placement, and duct condition. Oversized systems short-cycle, leaving humidity uncontrolled; undersized systems run constantly and wear out faster.

Static pressure measures resistance inside the duct system — high resistance means the system is working harder than it should to move air. After ductwork installation, a pressure test confirms the supply and return plenums are balanced and the system isn't starved for airflow. Skipping this step is how new installs end up with hot and cold spots despite a properly sized unit.

Both systems rely on refrigerant cycles, compressor function, and heat exchange — the diagnostic logic overlaps significantly. A technician experienced in walk-in coolers and reach-in units has traced refrigerant leaks and electrical faults across a wider range of equipment, which translates to faster and more accurate diagnosis on heat pump compressor and reversing valve failures.

A failing reversing valve typically causes the system to blow warm air in cooling mode or cool air in heating mode, or it gets stuck entirely in one position. You may also notice the system running but not reaching the thermostat setpoint. This is a component-level repair that requires proper refrigerant recovery before replacement — not a quick fix.

Inadequate duct sizing or unsealed duct leaks are the most common causes — a correctly sized unit can still underperform when conditioned air escapes before reaching the living space. Other causes include improper refrigerant charge at installation or an unverified airflow measurement. Efficiency verification after startup should confirm the system is operating within spec.

Twice yearly is the standard for heat pumps — once before the primary cooling season and once before heating season. Arkansas seasonal transitions are hard on capacitors and condenser coils, which accumulate debris during pollen and storm seasons. Catching a weak capacitor or low refrigerant charge during maintenance prevents the emergency call when temperatures peak.

A thorough maintenance visit covers condenser coil cleaning, evaporator inspection, compressor amp draw, capacitor condition, electrical connection tightening, and refrigerant charge verification. For kitchen environments, exhaust fan and hood diagnostics are part of the scope. Skipping any of these allows compressor stress to build silently until the system fails during peak service hours.

Duct leakage is responsible for significant efficiency loss in homes with older duct systems — conditioned air escaping into unconditioned attic or crawlspace space never reaches the rooms it was intended for. Sealing with mastic or metal tape at joints and plenums reduces that loss. The result is more consistent room temperatures and a system that reaches setpoint without extended run cycles.

Age and repair cost relative to replacement value are the two primary factors. A compressor failure on a system over 12-15 years old often doesn't pencil out against a new installation when you factor in the refrigerant type, remaining efficiency, and existing duct condition. Electrical component failures — capacitors, contactors, thermostat wiring — on a younger system are almost always worth repairing.

Beyond walk-in and reach-in coolers, a technician with commercial refrigeration specialization can service bread ovens, toasters, exhaust fans, and dinner hoods — equipment most residential HVAC shops decline to touch. This matters for food service operators because sourcing separate contractors for each equipment type creates scheduling gaps and inconsistent maintenance records.

Duct systems installed decades ago were sized to older equipment standards and frequently lack the sealing required under current code. In Central Arkansas, where mixed-age housing stock is common, original duct runs may have never been pressure-tested or sealed at joints. Retrofit installations require measuring existing static pressure and re-routing supply and return paths to match the new system's load requirements.