A snow-covered two-story house with one illuminated window photographed at night during a snowstorm.

HVAC Repair in Carmel, IN

Homes here need heat from October through May and cooling from June through August. If your system quits, tell us what it's doing and a licensed contractor who covers Hamilton County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An empty unfinished basement containing a forced-air furnace with overhead ductwork, exposed ceiling joists, and a single hanging light bulb.

Carmel runs its system almost year round

Homes here need heat from October through May and cooling from June through August. That leaves one month of rest for a system that otherwise runs almost nonstop.

Winter nights averaging 22°F mean long, steady burner cycles, and most furnaces here run on gas, leaning on the igniter to light the burner and the flame sensor to keep it lit. Summer afternoons near 83°F push the air conditioner to run long stretches to keep up, and that load falls on the compressor and the capacitor that starts it. Hamilton County has seen 69 damaging wind events and 11 winter storms over the past ten years, and a power interruption during either season can stall a system mid-cycle, one more stress those same parts have to absorb.

8 months
October through May, your system heats
3 months
June through August, it cools
22°F
the average winter night it heats against
83°F
the average summer afternoon it cools against
Isometric line illustration of a cutaway single-story house with a shingled roof, showing an interior furnace connected to ductwork and a tall vertical flue pipe, plus simple furniture in the adjacent room.
Your system heats October through May and cools June through August.

NOAA nClimDiv, 1991–2020 normals

An unfinished basement interior featuring a large metal furnace unit, exposed ceiling joists, concrete walls, and scattered boxes and cables on the floor.

A new furnace and air conditioner would cut about $120 a year off heating and cooling for a typical Hamilton County home.

  • A new furnace and AC$670 a year
  • An older furnace and AC$790 a year

Estimates for a typical Hamilton County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, Indiana fuel prices and NOAA climate normals. Your home will differ.

Repair makes sense when one part has failed.

Replacement makes sense when the furnace's heat exchanger is cracked, the air conditioner's compressor has failed, or repairs keep coming.

In Indiana, HVAC licensing for homes is left to the counties and cities.

Hamilton County decides who can legally do this work, not the state. Whether that means a tested and licensed contractor or just an open market depends on what Hamilton County itself has set up, since Indiana leaves that choice to the county.

For a repair that involves a gas connection and refrigerant, that local rule is the only official check on who does the job. There is no state license behind it, so what protection exists here comes entirely from whatever Hamilton County requires.

Sources: Indiana Department of Workforce Development · State of Indiana

Why is my heat not working?
Start with the thermostat and the power to the furnace before you assume the worst. Check that the thermostat is set to heat and a few degrees above room temperature, and that the furnace switch, the one that looks like a light switch near the unit, is on. If you have a gas furnace, look at the filter next. A clogged filter chokes airflow and can trip the furnace's safety switch, shutting it down before it overheats. If the furnace runs but never lights, or lights and shuts off again, that points to the igniter or the flame sensor, and a contractor will need to look at it. Winter nights here average 22°F, so a furnace that is down for even a day is worth treating as urgent.
Why is my system running but not cooling the house?
The first thing to check is the filter. A filter clogged with dust chokes airflow, and when air can't move across the indoor coil the coil ices up, and iced coils stop cooling. Look at the outdoor unit too. If the fan isn't spinning, or you don't hear it running, that's a separate problem worth mentioning to a contractor. If the filter is clean and the outdoor fan is running but the air coming from the vents is barely cool, the system is likely low on refrigerant, and that's a repair for a licensed contractor, not something to top off yourself. With summer afternoons here averaging 83°F, a system that's running but not cooling is losing ground fast, so it's worth getting looked at the same day if you can.
What can I check before calling for HVAC repair?
Check the thermostat first. Make sure it's set to the mode you want, heat or cool, and that the temperature you've set is actually different from the room temperature. Next, check the filter. Pull it out and hold it up to a light. If you can't see light through it, it's blocking airflow and needs to be replaced. After that, check the power. Look for a tripped breaker at your electrical panel, and for a furnace, check the switch that looks like a light switch near the unit itself, since it's easy to bump off. If everything checks out there and the system still isn't working right, that's the point to call a contractor, and telling them what you already checked will save time when they arrive.