Heat pump repair in Arlington.

Arlington is a town of buildings, not yards. More than half of the owner homes the Census counts here are condos or apartments, and a lot of Arlington’s heating is a heat pump in a closet with an outdoor half that is nowhere near your front door. So the first question on an Arlington call is rarely what broke. It is where the unit is, who holds the key, and who is allowed to open it.

If you own the unit, the heat pump that serves it is usually yours to fix, even when the condenser sits on a shared pad or a roof. Check your association’s rules for contractor access and send the manager a note that a tech is coming. If you rent, call your landlord first. Nearly six in ten Arlington homes are rented, and the landlord generally arranges repairs to the heating. Either way, give us the building name and the floor.

The single-family side is its own story. The median owner home here dates from 1960, a good many are older, and the heat pumps in them were mostly added after the fact, in tight spaces: an air handler in a crawl space, an attic with little headroom, a closet where a furnace used to be. Those installs fail in a particular way, through restricted airflow. A pump that ices over or short-cycles in a 1950s house is often fighting small ducts, not a bad part.

Arlington is also milder than the western suburbs, and that is good for heat pumps. They lean on their backup strips less often here than out in Loudoun or Fauquier. The flip side is that people don’t notice a failing one until the aux light has been on a while. If your thermostat says aux heat for hours on a day that isn’t bitter, the pump is not keeping up.