October in Chicagoland is when summer gives way to cooler mornings, shorter days, and the first real test of your home’s heating system. After sitting mostly unused through the spring and summer, your furnace is suddenly being asked to keep your family comfortable around the clock.
That’s why October is the perfect time to pay attention to how your furnace is operating.
If your furnace is making unusual noises, struggling to heat your home, cycling on and off, or simply isn’t performing like it used to, don’t wait until the first freezing night to find out there’s a problem.
At Alltech HVAC, we’re a family-owned and operated HVAC company based in Des Plaines, Illinois, serving homeowners and businesses throughout the North Shore and Northwest suburbs of Chicagoland. John and Joe have owned and operated Alltech since 2004, building the company around a simple philosophy: Service. Repair. Replace. Maintain. That’s it.
Why October Is the Right Time to Check Your Furnace
The worst time to discover a furnace problem is when you need heat immediately.
Every fall, HVAC companies across the Chicago area see an increase in service calls as homeowners turn their furnaces on for the first time. Problems that remained hidden during the warmer months suddenly become obvious.
Scheduling furnace maintenance or addressing a repair in October gives you an opportunity to identify problems before the heating season is in full swing.
A professional furnace inspection can identify issues involving the filter, ignition system, blower components, thermostat, airflow, combustion, and other critical components before they turn into a no-heat emergency.
Alltech HVAC offers a maintenance agreement that includes an annual furnace tune-up and AC tune-up, priority scheduling, a 10% discount on repairs to covered equipment, and additional benefits.
7 Signs Your Furnace Needs Repair
1. Your Furnace Won’t Turn On
If your thermostat is calling for heat but your furnace doesn’t start, don’t assume the problem is simply a dead battery.
A furnace that won’t start can have problems involving the thermostat, ignition system, electrical components, safety controls, or other parts of the heating system.
Before calling for service, make sure your thermostat is set to HEAT and that the temperature is set higher than the current room temperature. You can also check whether the furnace has power.
If it still won’t start, it’s time for a professional diagnosis.
2. Your Furnace Is Constantly Turning On and Off
This is known as short cycling.
A furnace that repeatedly starts and stops may have an airflow restriction, thermostat issue, overheating problem, or another mechanical or control issue.
Short cycling isn’t something homeowners should simply ignore. Repeated cycling can put additional stress on components and prevent your home from heating consistently. Change your filter first, then call for service if that does not fix the problem.
3. You’re Hearing Strange Noises
Furnaces aren’t completely silent, but new or unusual noises deserve attention.
Listen for:
- Banging
- Rattling
- Grinding
- Squealing
- Buzzing
- Whistling
A new noise can sometimes be an early warning that a component is wearing out or that airflow is restricted. Finding the problem early may mean a straightforward repair instead of a larger failure later in the heating season.
4. Some Rooms Are Much Colder Than Others
Uneven heating can be caused by more than just the furnace itself.
Problems with airflow, ductwork, filters, dampers, insulation, or system sizing can all contribute to rooms that never seem to reach the thermostat’s temperature.
If your bedroom is freezing while the living room is comfortable, your HVAC system may need professional attention.
5. Your Furnace Runs Constantly
Longer furnace cycles can happen when temperatures are extremely cold, but your system shouldn’t struggle unnecessarily to maintain a reasonable indoor temperature.
A dirty filter, restricted airflow, aging equipment, thermostat issue, or other mechanical problem could cause your furnace to run longer than necessary. Change your filter first. If that does not fix the problem, call for service.
Longer run times can also increase energy consumption.
6. You Notice an Unusual Smell
A brief dusty smell when your furnace runs for the first time after sitting unused can happen as accumulated dust burns off.
But persistent burning smells, electrical odors, unusual exhaust odors, or especially the smell of natural gas should never be ignored.
If you smell gas, leave the area and contact your gas utility or emergency services as appropriate. Do not attempt to diagnose a gas leak yourself.
For other persistent or concerning odors, turn off the system and have it inspected by a qualified HVAC professional.
7. Your Furnace Is Getting Old
Even a well-maintained furnace doesn’t last forever.
If your system is older, requires increasingly frequent repairs, or your heating bills continue climbing, October is a good time to have a professional evaluate its condition.
That doesn’t automatically mean you need a replacement.
At Alltech HVAC, our philosophy is simple: Service. Repair. Replace. Maintain. That’s it.
If your furnace can be repaired reliably and economically, we’ll tell you. If replacement makes more sense, we’ll explain why.
Don’t Forget Your Furnace Filter
A dirty or clogged filter can restrict airflow and make your heating system work harder.
Before heating season gets underway, check your filter and replace it if necessary. How frequently a filter should be changed depends on the filter type, household conditions, pets, and system usage. 1” filters should be changed every 1-2 months. 5” media filters should be changed every 3-6 months. Use lower MERV filters for more airflow. Higher MERV filters can be too restrictive. If you must use a high MERV filter due to allergies, you should change it every two weeks.
If you’re constantly changing filters or still experiencing airflow problems after replacing one, the underlying issue may require professional diagnosis.
Is Your Furnace Ready for a Chicagoland Winter?
Before temperatures really drop, homeowners should make sure their heating system is ready.
Your October checklist should include:
- Test your furnace before you need it
- Replace or inspect your air filter
- Check your thermostat
- Make sure supply and return vents aren’t blocked
- Keep the area around your furnace clear
- Pay attention to unusual noises or smells
- Schedule professional maintenance if you haven’t done so
- Address recurring heating problems before winter
Taking care of these items now gives you time to address problems while they’re still manageable.
Furnace Repair and HVAC Service Throughout Chicagoland
Alltech HVAC proudly serves homeowners throughout Des Plaines and surrounding communities, including Arlington Heights, Park Ridge, Mount Prospect, Prospect Heights, Glenview, Northbrook, Niles, Morton Grove, Wheeling, Elk Grove Village, Schaumburg, Palatine, Rolling Meadows, Inverness, Northfield, Glencoe, and surrounding areas.
We provide furnace repair, furnace maintenance, heating installation, boiler services, air conditioning service, indoor air quality solutions, and commercial HVAC service.
Whether your furnace won’t start or you simply want peace of mind before winter, our local team is here to help.
The Alltech Guarantee
Alltech HVAC is family-owned and operated, and we’ve built our reputation around doing what’s right for the customer.
Our philosophy is straightforward:
Service. Repair. Replace. Maintain. That’s it.
No unnecessary sales pitch. No commission-driven recommendation. Just honest HVAC service based on your equipment’s condition, safety, efficiency, and long-term reliability.
That’s the Alltech Guarantee.
Schedule Your Furnace Service Before Winter
Don’t wait for the first freezing night to discover your furnace needs attention.
If your furnace is making unusual noises, struggling to heat your home, cycling frequently, or hasn’t been professionally serviced recently, contact Alltech HVAC to schedule service.
Family owned. Local. Experienced. No sales. No commission. No nonsense.
Service. Repair. Replace. Maintain. That’s it.