HVAC Repair in Denton, 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 Caroline County will get in touch.
Tell us about the job
It takes about a minute.
Denton runs its heat and air almost all year
Your system works eleven months out of the year here. Heat from October through April, cooling from June through September, with barely a break between them.
Winter nights average 28°F from December through February, so the furnace cycles on and off most of the night to hold the temperature. That is a lot of starts on the igniter over a winter. Summer afternoons average 86°F, which keeps the air conditioner's compressor under load for hours at a stretch. Storms add to that load. Over the past ten years this area has seen 9 winter storms and 75 damaging wind events, and in 2024, 11% of Maryland households lost power for at least a day. A system that loses power and does not restart on its own can leave a house without heat or air until someone resets it.
- 7 months
- October through April, your system heats
- 4 months
- June through September, it cools
- 28°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.
The license comes from the Maryland Board of Heating, Ventilation, Air Conditioning, and Refrigeration Contractors. It belongs to the contractor, not to any one job, so the same license covers whatever work they take on, including a repair like this one.
For a repair to your heating and cooling system, that license is what stands behind the person or company doing the work. Maryland's rule reaches the contractor directly.
Sources: Maryland General Assembly · Maryland Department of Labor
- Why is my heat not working?
- Start with the thermostat. Make sure it is set to heat and the setpoint is above room temperature, since a setting bumped even a degree low will stop a furnace from firing. If the thermostat looks right, check the breaker and any switch near the furnace that looks like a light switch, since that shuts the whole unit down if it gets bumped off. A furnace that starts and then quits partway through the cycle often points to the igniter or the flame sensor, and that is a job for a licensed contractor to diagnose.
- 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 when that happens the coil can ice over and blow warm air even though the system is running. Check that outdoor unit too. If the fan is not spinning or the area around it is packed with leaves or grass clippings, the system cannot move heat outside no matter how long it runs. If the filter is clean and the outdoor unit looks fine, the system likely needs a licensed contractor to check refrigerant levels and the coil itself.
- What can I check before calling for HVAC repair?
- Check the thermostat settings and batteries first. A thermostat with weak batteries can lose its display or stop calling for heat or cooling even though it looks normal. Check the breaker panel for a tripped breaker, and look for any power switch near the furnace or outdoor unit that may have been switched off. Check the air filter and replace it if it is visibly dirty, since restricted airflow causes problems in both heating and cooling. If the system still is not working after that, a licensed Maryland HVAC contractor can diagnose the rest, since Maryland requires a state license to do this work.