Heat pump replacement in Aberdeen, MD that fixes what wore out the last one

Replacing a heat pump with the lessons of the old one

Heat pumps move heat instead of making it. In summer they carry heat out of the house, and in winter they pull it in from outdoor air, even on cold days. Because the same compressor, coils and fan do both jobs, a heat pump often logs far more running hours than an air conditioner. That makes the question of why an old unit failed especially useful when planning its replacement.

We start with the history. Repeated compressor trouble, iced coils, frequent defrost problems or high winter bills often trace back to low airflow, a refrigerant leak that was topped off instead of repaired, poor drainage around the outdoor unit or a thermostat that called for backup heat too often. Replacing the equipment without addressing those causes can leave the new system facing the same conditions.

A heat pump sized only for summer can leave winter to the most expensive heat in the house.

Sizing a heat pump is a heating question first. A unit sized only for summer cooling may leave a large share of winter heating to electric resistance strips, which cost much more to run. We calculate the heating load of the home, look at how capacity changes as outdoor temperature drops, and plan the balance point where backup heat is needed. Cold climate models hold more capacity at low temperatures and can reduce reliance on backup heat.

Refrigerants are changing. Newer equipment is moving to lower global warming potential refrigerants, and those systems carry their own installation requirements, including updated detection and ventilation rules in some configurations. The existing line set may or may not be reusable depending on its size, condition and the new equipment manufacturer instructions. We explain which applies to your home before work begins.

The outdoor unit location matters more for heat pumps than for air conditioners. During defrost, the unit sheds water that can refreeze into ice beneath it. The replacement should sit high enough off the ground or on a stand that lets meltwater drain away, with clearance for airflow and snow. Moving a poorly placed unit is often worth the added effort.

Airflow is verified, not assumed. Heat pumps are sensitive to low airflow in both modes, so we measure static pressure and correct duct restrictions where needed. If ducts are leaking into an attic, our Duct Sealing service can protect the efficiency of the new system.

Commissioning covers both seasons regardless of the day we install. Refrigerant charge is set and confirmed, defrost operation and reversing valve function are checked, and backup heat is staged so it assists the heat pump rather than replacing it. The thermostat is configured for your equipment, and you receive a written labor warranty along with manufacturer registration.