HVAC Repair in Leonardtown, MD
Homes here need heat from October through April and cooling from June through September. If your system quits, tell us what it's doing and a licensed contractor who covers St. Mary's County will get in touch.
Tell us about the job
It takes about a minute.
Eleven months of work, most homes on electric heat
Your system in Leonardtown works almost year round. Heat from October through April, cooling from June through September, only one month off in between. Winter nights average 29°F, so the heat runs long after dark and into the morning. Summer afternoons reach 86°F, and the compressor answers back all day.
Most homes here heat with electricity, so a heat pump or electric furnace is doing that work night after night through the cold months. Storms come through too, 146 damaging wind events and 14 winter storms over the past ten years, and 11% of Maryland households lost power for a full day or more in 2024. A system that stops during a cold snap or a summer heat wave is not a small problem here.
- 7 months
- October through April, your system heats
- 4 months
- June through September, it cools
- 29°F
- the average winter night it heats against
- 86°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Maryland requires HVAC contractors to hold a state license.
Maryland's Board of Heating, Ventilation, Air Conditioning, and Refrigeration Contractors keeps the record of who holds this license. It covers the contractor, not each job, so the same license applies to a repair like this one and to the next one after it.
For work on your heating and cooling system, that license is what stands behind the person doing the job. It means the contractor is on file with the state under that board, not just running a business that happens to do HVAC work.
Sources: Maryland General Assembly · Maryland Department of Labor
- Why is my heat not working?
- Start with the thermostat. Check that it is set to heat, not cool, and that the temperature is actually set above the room temperature. If the thermostat looks right, check the breaker for the furnace or air handler, since a tripped breaker will shut the whole system down with no warning. Gas furnaces have an igniter and a flame sensor, and if either one fails the furnace will run the blower but never produce heat. At 29°F on a winter night, a furnace that will not fire is not something to leave until morning. If the breaker is fine and the thermostat is set right, it is time to call a contractor.
- Why is my system running but not cooling the house?
- Check the air filter first. A filter clogged with dust blocks airflow across the coil, and a system starved for air cannot pull heat out of the house even though it keeps running. Next check the outdoor unit. If the fan is not spinning or the coil is caked with dirt and grass clippings, the system has nowhere to send the heat it collects indoors. If the filter is clean and the outdoor unit is running clean and clear but the house still is not cooling, the refrigerant charge or a part inside the unit needs a contractor's attention.
- What can I check before calling for HVAC repair?
- Check the thermostat settings and its batteries, since a dead thermostat display can look like a dead system. Check the breaker panel for a tripped breaker on the furnace, air handler, or outdoor unit. Check the air filter and replace it if it is gray with dust, since a blocked filter causes both weak heat and weak cooling. If the outdoor unit has power but the fan is not turning, or if you smell gas near the furnace, stop checking and call a licensed contractor. Maryland requires HVAC contractors to hold a state license, so whoever comes out to look at the system should be able to show you one.