Quick Answer
If your furnace in Flint, MI is more than 15 years old, making new noises, or leaving soot or odors behind, have a licensed HVAC technician service it before the cold sets in. If you're buying a home, the furnace is part of every Mike's Complete Home Inspection: we look at its condition and age, the flue, the distribution system, the thermostat, and combustion safety, with thermal imaging included.
Why Furnace Problems Matter in Mid-Michigan
The first cold snap in Genesee, Lapeer, Shiawassee, Saginaw, and Oakland County usually arrives in mid to late October. By Thanksgiving, the furnace is running every night. By January, it barely stops. If something is wrong with the system, fall is the time to find out, before a breakdown leaves you waiting on a repair in the middle of a cold spell.
The risks of running a damaged furnace are real. A cracked heat exchanger can let combustion gases into the air you breathe. A failing draft inducer can vent flue gases the wrong way. A disconnected vent pipe can push carbon monoxide (CO) into the living space. None of these announce themselves before they cause harm.
What Goes Wrong With Older Flint Furnaces
A lot of Mid-Michigan homes are older, and many in Flint, Burton, Mt. Morris, and Davison still run furnaces that are 20 to 30 years old. Gravity furnaces and old boilers still turn up here too. The most common problems in aging systems:
- Cracked heat exchangers. Older standard-efficiency furnaces often develop cracks near the end of their life, which can let combustion gases bypass the flue.
- Failed draft inducers. The small motor that pulls combustion gases through the furnace. When it fails, the system either won't fire or fires unsafely.
- Disconnected or sloped flue pipes. Common in basements after utility-room remodels. A flue that slopes back toward the furnace causes condensation problems and CO risk.
- Dirty or blocked burners. Dust, pet hair, and basement humidity build up over time and make the burners run poorly.
- Worn blower motors and capacitors. Often the first part to fail on a system that still runs.
- Not enough combustion air. Tightly sealed or remodeled homes sometimes don't leave enough air for the furnace to burn safely.
- Aging gas valves and standing pilots. Older pilot-light systems need regular attention from a technician.
Warning Signs to Watch For
You don't need special tools to notice that something is off. Call a licensed HVAC technician if you see or hear:
- Yellow or flickering burner flames instead of a steady blue flame
- Soot or scorch marks around the furnace cabinet or flue pipe
- A CO detector going off, or family members with headaches that ease when they leave the house
- Banging, rattling, or squealing when the furnace starts or runs
- Rooms that won't heat evenly, or a furnace that cycles on and off constantly
- Rust or water around the base of a high-efficiency furnace
- A burning or chemical smell that lingers after the first few cycles of the season
If a CO alarm sounds, get everyone outside and call 911 or your gas utility first.
Carbon Monoxide and Older Homes
CO problems in older homes usually trace back to a cracked heat exchanger, a disconnected flue, or a water heater that backdrafts into a chimney it shares with the furnace. Put CO detectors near every sleeping area and on every level of the home, and test them when you change your furnace filter.
If you want to know more about the air inside your home, our air quality testing includes carbon monoxide spot checks near furnaces, water heaters, and fireplaces, plus observation of combustion appliances for backdraft and spillage.
What a Home Inspection Covers
If you're buying a home in the Flint area, the heating system is one of the first things we look at. Our home inspection covers:
- Furnace or boiler condition and age
- Flue integrity
- The distribution system and thermostats
- Combustion safety
- The AC condenser and coil
Infrared imaging is included on every home inspection we perform. It shows temperature differences that point to hidden problems, such as air leaks, missing insulation, and moisture. The report gives you clear priorities and recommendations, so you know what the heating system needs before you move in.
When to Call an HVAC Technician
A home inspection tells you the condition of the system on the day of the inspection. It isn't a furnace service. For cleaning, tune-ups, repairs, a closer look at a suspected heat exchanger crack, or advice on repairing versus replacing an older furnace, hire a licensed HVAC technician. If our report recommends further evaluation of the heating system, that's the professional to call.
A few rules of thumb for the repair or replace conversation with your technician:
- Younger systems: small repairs like an igniter, capacitor, or blower motor usually make sense.
- Older systems: a major failure such as a cracked heat exchanger or a failed control board is often the point where replacement is worth discussing.
- Very old systems: plan and budget for replacement before the next major failure, not during it.
Related Reading
- Winter-Ready, Essential Home Maintenance Checklist
- Frozen Pipe Prevention for Michigan Homes
- What Fails a Home Inspection in Michigan?
- How Much Does a Home Inspection Cost in Michigan?
- Moisture, Mold, and Your Home, A Professional's Guide
FAQ
Should I get an HVAC tune-up or a home inspection? They do different jobs. An HVAC technician cleans, services, and repairs the system. A home inspector evaluates the condition of the whole home, including the heating system. If you're maintaining your own home, get the tune-up. If you're buying, get the home inspection, and follow up with a technician on anything the report flags.
Can anyone find every heat exchanger crack? No method catches every crack. Some can only be confirmed when a technician takes the furnace apart. If you have warning signs or a CO alarm, have a licensed HVAC technician evaluate the furnace.
What if the home has a high-efficiency furnace? High-efficiency furnaces have their own trouble spots, such as condensate drains and plastic vent piping. Keep the drain clear, keep the outside vent free of snow and ice, and have a technician service the system on schedule.
Do you look at boilers too? Yes. Boilers are part of the heating system we evaluate during a home inspection, including the older boilers and gravity systems still found in many Flint-area homes.
Schedule Your Home Inspection in Flint, MI
We inspect homes across Flint, Grand Blanc, Burton, Davison, Fenton, Lapeer, Owosso, and Saginaw, and the heating system is part of every inspection. Schedule by calling or texting (810) 423-2360, or learn more about our home inspection in Flint, MI and infrared inspection services.