Residential AC Service in Montgomery County, MD

RESIDENTIAL AIR CONDITIONING SERVICE MONTGOMERY COUNTY MD

Shemtov Systems offers residential air conditioning services in Montgomery County MD. We offer a wide variety of makes and models of central air conditioning systems including Carrier,and Bryant shown below. we will offer you the ideal air conditioning system for your home .It would be tailored to your own unique: the area you live in, how your home is built, and to the comfort and air quality you are seeking. We will take into consideration the need to keep out dust and pollen to reduce allergies and asthma sensitivity .
Shemtov Systems is a local HVAC company. that have been providing HVAC services to Maryland residents for over 30 year. we specialize in residential heating, Heat pumps, furnaces and air conditioning. As well as small commercial rooftops and commercial heating systems .

Air conditioning products

Shemtov Systems offers a wide verity of residential products. Our technicians are trained and certified to install,
service and repair most brands including Bryant shown here. we provide full service to residential and
light commercial, heating and, air conditioning systems.

We Service

The following areas for HVAC, Heating & Air Conditioning Services for both Commercial & Residential

Central air conditioning in a Maryland house is a split system: an outdoor condensing unit paired with an evaporator coil in the plenum above the furnace or inside the air handler, tied together by a refrigerant line set and the home's ductwork. When cooling falls off, airflow is the usual cause, then a failed electrical part, then refrigerant loss. Shemtov Systems repairs, replaces, and installs central systems for houses across Silver Spring and Montgomery County. Call 240-355-3333.

Key takeaways

The indoor coil and outdoor unit are rated as a pair, so replacing one alone leaves the pair under its label rating.
Refrigerant is not consumed, so a system running low has a leak; topping it up buys time, not a repair.
Ice on the copper suction line is an airflow or charge fault; run the fan with the compressor off to thaw it.
Duct that cannot carry roughly 350 to 400 cubic feet per minute per ton caps the capacity you actually get.

What can you check before calling for cooling repair?

Confirm the thermostat is calling for cooling with the fan on auto, change the filter, and check the breaker and outdoor disconnect. Look for a full condensate pan or a tripped float switch under the coil, which shuts the system down on purpose. With a clean filter and clear outdoor coil, supply air should run roughly 16 to 22 degrees cooler than return air. See signs a furnace or AC needs repair.

Why is the system running but not cooling the house?

Most of the time it is airflow. A loaded filter or dirty evaporator starves the coil, its surface drops below freezing, and ice seals it shut, so the outdoor unit keeps running while nothing cools. A condenser coil packed with cottonwood does the same from the other end. Past airflow, look at the run capacitor, the contactor, the condensate drain, and the charge.

How do I decide between repairing and replacing?

Weigh the age of the system against the cost of the repair. A run capacitor on a ten-year-old unit is an easy call; a failed compressor near the end of a system's service life rarely is. Refrigerant supply belongs in that decision. An R-410A system stays legal to service, but the federal phasedown caps production of these refrigerants at 60 percent of baseline through 2028 and 30 percent from 2029. See replacement costs in Maryland.

What do SEER2 and EER2 mean for a new system?

SEER2 is seasonal cooling output divided by seasonal electricity input, now measured with the blower working against realistic duct resistance rather than the 0.10 to 0.20 inches of water column the old SEER test allowed, so the same machine rates lower. EER2 is a single full-load reading at a 95-degree outdoor condition. Maryland sits in the DOE Southeast region, where a split air conditioner under 45,000 Btu per hour cannot be installed below 14.3 SEER2.

How is the right size air conditioner selected?

Manual J produces the load, and notes from past central air conditioning service show how the old system behaved. Manual S then picks equipment against that load at the local design temperature, including how capacity divides between cooling the air and drying it. Manual D confirms the duct can carry the airflow. Where the county requires the Manual J, it is filed with the permit through ePlans. Our guide covers what size air conditioner a house needs.

What happens during a central air conditioning replacement?

Load calculation and a check of duct capacity come first, then a matched coil and condenser are chosen as a certified combination. The line set is evaluated and flushed or replaced, the outdoor unit gets a level pad, a disconnect, and a whip, and condensate gets a float switch. Brazing is done under flowing nitrogen so scale does not form inside the tubing, and the system is evacuated under a micron gauge before the charge is weighed in.

Frequently asked questions

What paperwork does a replacement need in Montgomery County?

A mechanical permit, applied for electronically. One-for-one replacements can be issued immediately, and anything needing plan review is generally issued within about three business days. A gas furnace draws a WSSC inspection too; an all-electric heat pump needs only the county inspection.

Do I have to replace the furnace at the same time?

Not always. It depends on whether the furnace blower can move the airflow the new coil needs, and on the age of the furnace. Where both are near the end of their service life, doing them together avoids paying twice for the labor.

Should I close vents in unused rooms?

No. Closing registers raises static pressure, cuts total airflow, and can freeze the coil. For different temperatures room to room, look at zoning the duct system instead.

Talk to Shemtov Systems

For central air repair, or a straight answer on sizing and replacement for your house, call Shemtov Systems at 240-355-3333.

Homeowner guides

Straight answers to the questions we hear most from Montgomery County homeowners.