INDIANAPOLIS AND MARION COUNTY
Heating and cooling notes for Indianapolis
Name the sound before you name the part.
A basement furnace in an older house and a closet air handler in a newer one fail in different rooms. Write down the thermostat, the sound, and whether you smell anything. That note is more useful than a guess about the part.
What is happening? ↓Concept diagram only. Equipment layouts vary by house.
START WITH THE SYMPTOM
What are you noticing?
The house is getting cold tonight
A short checklist for people, smells, and backup heat.
The furnace will not light
What a failed ignition sounds like, and the gas-smell stop.
Cooling runs, but the house stays warm
July humidity, a frozen line, the filter, and the outdoor unit.
An alarm, or a headache that eases outside
Leave first. Fuel-burning heat is not a mystery to solve indoors.
BEFORE YOU CALL
Make the first call specific.
You do not need the part name. You need the sound, the thermostat screen, and the room where the equipment sits. The notes stay in your browser.
Write my service notes →- What changed?No heat, no cooling, ice on the line, a blank thermostat, or an alarm.
- Where is the equipment?Basement, hall closet, attic, and whether an outdoor unit is buried in snow.
- What will they inspect?Ask for a written finding before a repair or a replacement pitch.
ALL GUIDES
Fifteen guides for Indianapolis heating and cooling.
Written for four seasons here: humid summers, cold winters with snow and ice, basement furnaces in older neighborhoods, and closet or attic handlers farther out.
How a visit goes
What to write down before a heating and cooling technician walks the house.
Read the guide →Furnace will not light
What a failed ignition sounds like, and when a gas smell means you leave.
Read the guide →Air conditioner not cooling
Humidity, a frozen coil, the filter, and a quiet outdoor unit.
Read the guide →Heat pump or gas furnace
Defrost, emergency heat, and how dual-fuel systems hand off in cold weather.
Read the guide →What changes a quote
Access, timing, parts, and permits, without a price list.
Read the guide →Repair or replace
A failed part versus a full change-out, without dollar figures.
Read the guide →No heat tonight
A short checklist when the indoor temperature is falling.
Read the guide →Fall and spring checks
What to look at before heat season and again before cooling season.
Read the guide →Carbon monoxide and heat
Alarms, symptoms, and why you do not hunt for the source.
Read the guide →Thermostat checks
What the screen is saying, and when to leave the wiring alone.
Read the guide →Permits and inspections
Which office to ask, and what not to assume about licenses.
Read the guide →Questions before you hire
Credentials, insurance, scope, and the safety lines a company should not cross.
Read the guide →DIY or call a pro
Filters and batteries on one side. Gas, refrigerant, and safeties on the other.
Read the guide →Refrigerant, in plain language
Section 608, leak repairs, and why a can is not a fix.
Read the guide →Indoor humidity
Sticky summers, dry furnace air, and what to write down before you buy a gadget.
Read the guide →WHY AN INDIANAPOLIS GUIDE
Basement furnaces. Attic handlers. Real winters.
Older houses in Broad Ripple, Irvington, Fountain Square, Meridian-Kessler, and Butler-Tarkington often keep the furnace in a basement. Newer houses toward the edge of the city, and nearby separate cities such as Carmel, Fishers, Greenwood, Noblesville, and Speedway, may use a closet or attic air handler and have their own permit counter. Summers are hot and humid. Winters bring snow and ice. Gas furnaces are common. Heat pumps and dual-fuel systems are here too. Many Indianapolis addresses use Citizens Energy Group for gas, and the emergency number that matters is the one on the bill.
Who writes this and how →QUICK ANSWERS
Common Indianapolis questions
Is this a heating and cooling company?
No. Indianapolis HVAC Guide publishes information only. We do not repair furnaces, sell systems, send technicians, or book appointments. A phone box on a page, if one ever appears, would be a referral line run by someone else, not a dispatch desk in this office.
Which gas utility emergency number should I call?
Use the emergency number printed on your gas bill. Many Indianapolis addresses are served by Citizens Energy Group, and the number on that bill is the one to call from outside if you smell gas. Do not flip switches on the way out, and do not use a number copied from an old magnet or a search result.
Do nearby cities share Indianapolis permits?
Do not assume they do. Carmel, Fishers, Greenwood, Noblesville, and Speedway are examples of separate cities with their own counters. Give the job address and ask which office applies. This site does not say whether Indiana requires a statewide heating and cooling license. Ask the Indiana Professional Licensing Agency and the local office.
What should I write down before I call?
Copy the thermostat mode, setpoint, and room temperature. Note what you hear at the furnace or air handler, whether the outdoor unit is running, and any smell. Add when it started and a photo of the data plate with the panel still closed. Those notes are the visit.
Can I add refrigerant or bypass a switch to get through the night?
No. Do not add refrigerant, and do not jump out or tape down a safety switch. If the house is getting cold, use backup heat the system already has, or go somewhere warm. A carbon monoxide alarm means everyone leaves and emergency services are called. The guides explain those stops without a repair procedure.