Licensed Maryland HVACR contractor · 41 years in Montgomery County 24/7 emergency service
Poteete HVAC · since 1985

Silver Spring, MD · Cooling · 24/7 emergency

Air Conditioning Repair Services in Silver Spring, MD

No-cool calls across Four Corners, Woodside and downtown

Local detail

AC Repair in Silver Spring

Silver Spring generates two distinct kinds of no-cool call. In the single-family neighborhoods it is usually a capacitor, a fouled condenser coil or a clogged condensate drain on a basement air handler. Downtown it is a fan coil in a closet on the fourteenth floor, where the fault is often the building loop rather than the unit itself, and diagnosis means talking to the building engineer before pulling anything apart.

  • Condensate drains in older basements clog with the mineral scale typical of WSSC water and trip float switches
  • Downtown high-rise fan coils need building engineer coordination and a COI before we can even enter the mechanical closet
  • R-22 systems are still running in Colesville and White Oak — we price the honest replacement math rather than recharging a leak
The refrigerant cycle A closed loop moving through compressor, condenser, metering device and evaporator, with refrigerant changing between high-pressure hot vapour and low-pressure cold liquid. Compressor Heat rejected outdoors Condenser Metering Evaporator Heat absorbed indoors High pressure vapour Low pressure liquid
Air conditioners and heat pumps do not create cold — they move heat. Diagnosis follows the same loop: superheat at the evaporator and subcooling at the condenser tell us where the charge and the metering device actually stand, which is why we measure both rather than reading pressure alone.

The housing

What we find in Silver Spring homes

Predominantly 1925–1965 brick colonials, Cape Cods and ramblers, with 1970s split-levels in Colesville and White Oak and a dense core of post-2000 high-rise condominiums downtown. A large share of pre-1955 homes were built with hydronic heat and had cooling added decades later.

  • Hot-water and one-pipe steam boilers with cast-iron radiators in pre-1955 homes
  • Converted oil-to-gas forced air, often on undersized original return ductwork
  • Gravity-furnace-era duct systems retrofitted with modern blowers they were never designed for
  • Vertical stack fan coil units and water-source heat pumps in downtown condominium towers
  • Mid-1990s and early-2000s split systems now well past expected service life

Scope of the work

  • Full refrigerant circuit diagnosis: superheat, subcooling, suction and liquid line pressures
  • Electronic leak detection and dye when a system is losing charge
  • Capacitor, contactor, relay and control board testing under actual load
  • Blower motor amp draw and total external static pressure measurement

Utilities · Silver Spring

Electric: Pepco. Gas: Washington Gas. Water: WSSC Water. Permitting authority: Montgomery County Department of Permitting Services (DPS).

Neighborhoods covered

Downtown Silver Spring, Woodside Park, Four Corners, Forest Glen, Sligo Park Hills, Northwood Park, Kemp Mill, White Oak, Colesville, Indian Spring, Seven Oaks, Hillandale and the surrounding 20901, 20902, 20903, 20904, 20905, 20906, 20910 ZIP codes.

Local factors

Conditions that shape this job in Silver Spring

  1. Downtown condominium rules

    The towers along Georgia Avenue, Colesville Road and Wayne Avenue run stacked fan coils or water-source heat pumps on a building loop. Work needs building engineer coordination, a certificate of insurance filed with management, elevator reservations and often weekday-only access windows. We handle that paperwork routinely.

  2. Sligo Creek valley humidity and tree canopy

    Homes along the Sligo Creek corridor and in Sligo Park Hills sit in a shaded, humid microclimate. Heavy tree canopy loads condenser coils with pollen and seed fluff in spring, and the lower solar gain means these homes are frequently over-cooled by systems sized on square footage alone.

Questions

AC Repair in Silver Spring — common questions

My condo AC stopped and the building says it is my problem. Who is right?
Usually it depends on where the fault is. If the fan coil, its thermostat, valve or condensate pump has failed, that is typically the unit owner. If the building water loop is out of temperature or a riser valve is closed, it is the association. We diagnose it and tell you plainly which side of the line the fault sits on — in writing, if you need it for management.
My AC is running but the house will not cool below 78. What is wrong?
On a 95-degree day, a correctly sized system typically holds about 20 degrees below outdoor temperature, so 75 is a realistic floor for many homes. If you are stuck at 78 with the unit running constantly, the usual causes are a dirty evaporator coil, low refrigerant charge from a leak, a failing capacitor letting the compressor short-cycle, or duct losses in a hot attic. All four are measurable.

More ac repair questions answered on the Maryland service page →

Talk to a technician

AC Repair in Silver Spring? Tell us what the system is doing.

Describe the problem and we will tell you what it usually means, what it typically costs to diagnose, and when we can be there. No obligation, no scripted sales call.

Call (301) 555-0182 Request a quote

Mon–Fri 7:00am–6:00pm · Saturday 8:00am–2:00pm · 24/7 emergency service