Porter, IN Heating System Repairs: 5 Common Furnace Issues

Estimated Read Time: 9 minutes

When the cold hits Chesterton and lake-effect winds roll in from Lake Michigan, a broken furnace cannot wait. If you searched furnace repair near me, this guide shows the top five furnace problems and how to fix them fast. Use the simple checks below to get heat back safely. When a repair needs a pro, our certified team at Summers Plumbing Heating & Cooling is ready 24/7 across Porter County and nearby cities.

1) Furnace Blowing Cold Air or No Heat

Nothing is more frustrating than a running blower with no warmth. Before you panic, try these steps.

1. Confirm thermostat settings
2. • Set to Heat, not Auto Cool.
   • Raise the setpoint 3 to 5 degrees above room temperature.
   • Replace batteries if the screen is dim or blank.
2. Check the furnace power switch and breaker
3. • The furnace switch looks like a light switch near the unit. Turn it fully On.
   • Check the electrical panel. Reset a tripped breaker once. If it trips again, call a pro.
3. Replace or clean the air filter
4. • A clogged filter starves the heat exchanger of airflow and can cause a safety shutdown. Replace 1-inch filters every 30 to 60 days in winter.
4. Inspect the pilot light or ignitor
5. • Older furnaces have a standing pilot that can blow out. Follow the manufacturer’s lighting instructions. If it will not stay lit, you may have a faulty thermocouple.
   • Newer units use hot surface ignitors. If cracked or not glowing, it likely needs replacement.
5. Look for error codes
6. • Many furnaces flash a diagnostic LED behind a small window. Count the flashes and check the code chart on the panel.

When to call a pro

• Repeated pilot failure, gas smell, or any carbon monoxide alarm.
• Ignitor or control board replacement.
• Persistent lockouts or error codes after a filter change.

Why this happens Restricted airflow and ignition failures are the top causes. Our technicians test thermostats, inspect burners, verify gas pressure, and confirm safe combustion. We finish with a full system test so your home heats evenly again.

2) Short Cycling or Overheating (Furnace Turns On and Off Frequently)

Short cycles waste energy and stress components. The fix can be simple.

1. Start with the filter
2. • A dirty filter overheats the heat exchanger, which triggers the high-limit switch to shut the burner off.
2. Check supply and return vents
3. • Open all vents. Avoid blocking with rugs or furniture. Closed vents increase static pressure and heat buildup.
3. Inspect the flame sensor
4. • A dirty flame sensor stops gas flow a few seconds after ignition. Lightly polish the metal rod with a fine abrasive pad and reinstall. If the problem returns, replacement may be needed.
4. Verify thermostat placement
5. • A thermostat over a register or in direct sun misreads heat and short cycles the system. Consider relocating.
5. Condensate issues on high-efficiency furnaces
6. • If the condensate line is clogged or frozen, pressure switches may trip and stop the burner. Clear the trap and ensure proper slope and heat tape where needed.

When to call a pro

• Repeated high-limit trips, melted wiring insulation, or combustion concerns.
• Draft inducer, pressure switch, or control board faults.

Our approach We measure static pressure, inspect blower speed, clean burners and blower assemblies, and confirm safe flame signal. If components are weak, we replace them with high-quality parts and validate performance.

3) Strange Furnace Noises You Should Not Ignore

Some sounds are normal at startup. Others point to a problem that can escalate.

Common noises and causes

• Banging or booming: Delayed ignition or expanding ductwork. Delayed ignition can crack a heat exchanger. Have a pro inspect burners and gas pressure.
• Squealing or screeching: Loose or worn blower belt, dry bearings, or motor issues. Lubrication or replacement may be required.
• Rattling or clanking: Loose panels or failing blower wheel. Tighten screws and inspect the wheel for cracks.
• Humming or buzzing: Electrical relays or a failing capacitor. Continued use can overheat the motor.

DIY checks

1. Tighten access panels and nearby duct screws.
2. Replace a worn belt if you can access it safely.
3. Replace the filter to reduce blower strain.

When to call a pro

• Any booming on startup.
• Repeated squeal after basic checks.
• Electrical humming with a hot motor casing.

Professional fix Our technicians clean burners, set gas pressure, test capacitors and relays, and balance blower wheels. After repairs, we run a quiet test cycle and verify airflow to each level of your home.

4) Furnace Will Not Start At All

A dead furnace often traces back to a simple safety or power issue.

1. Confirm power and door switch
2. • Check the breaker and the service switch by the unit.
   • The blower door must be seated or a safety switch cuts power. Reseat firmly.
2. Thermostat and wiring
3. • Replace batteries and ensure tight wires at the thermostat. If you are comfortable, gently tug low-voltage wires at the furnace control board to confirm they are seated.
3. Check the condensate pump
4. • If the pump reservoir is full or the pump failed, a safety switch may block the furnace from running. Clear debris and confirm the discharge line is not frozen.
4. Inspect the pressure switch tubing
5. • Cracked or dislodged tubing prevents the inducer from proving draft. Reattach or replace.
5. Look for a tripped GFCI
6. • In basements or garages, a GFCI outlet on the same circuit can trip and kill power.

When to call a pro

• Repeated breaker trips.
• Inducer motor failure, pressure switch problems, or control board damage.

How we restore heat quickly We test electrical supply, safeties, and low-voltage circuits, then scan for stored fault codes. With parts on our trucks, we often repair the same day. After repairing, we test the full heat cycle and clean the workspace before we leave.

5) Weak Airflow or Cold Rooms

Uneven heat makes winter miserable. Start with airflow basics, then rule out duct or blower problems.

1. Filter and vents
2. • Replace the filter and open all supply and return grilles. Vacuum pet hair from grilles.
2. Duct leaks or crushed runs
3. • In attics or crawl spaces, look for disconnected joints or kinks. Minor gaps can be sealed with approved mastic. Significant damage needs professional duct repair.
3. Blower performance
4. • If air feels weak at every vent, the blower wheel may be dirty or the motor capacitor weak. Cleaning and a new capacitor can restore performance.
4. Balancing and zoning
5. • Two-story homes in Valparaiso and Porter often need damper adjustments in winter to push more heat upstairs. Mark damper positions for summer and winter.
5. Humidity and IAQ
6. • Dry air makes rooms feel cooler. Whole-home humidification and duct cleaning can improve comfort and airflow.

When to call a pro

• Persistent cold rooms after filter and vent checks.
• Suspected duct leaks you cannot access safely.

Our solution path We measure airflow and static pressure, inspect the blower assembly, test capacitors, and evaluate duct design. If upgrades are needed, we present options clearly and help you prioritize comfort and budget.

Pro Maintenance That Prevents Breakdowns

The fastest fix is often prevention. A seasonal tune-up catches small issues before they become emergency calls.

What our tune-up includes

• Clean coils, burners, and blower assemblies.
• Check key parts for wear or signs of failure.
• Test the thermostat for precise operation.
• Measure refrigerant on heat pump components and assess airflow when applicable.
• Secure electrical connections and review safety mechanisms.
• Lubricate moving parts to reduce wear.
• Inspect and replace air filters as needed.

Member benefits

• Two professional tune-ups per year.
• First-in-line scheduling for urgent service.
• Discounts on repairs and parts.
• Longer system lifespan and improved energy efficiency.
• Peace of mind for every heating season.

Repair or Replace: How To Decide Fast

Age and safety lead the decision. If your furnace is older than 10 years and needs frequent repairs, planning a replacement can save money long term. We start with a full assessment, measure your home, and size the system correctly. You receive clear, upfront pricing, and we can match or beat a competitor’s written quote. After installation, our team stays with you for routine maintenance and seasonal tune-ups so your investment performs for years.

Safety First: When To Stop DIY

• You smell gas or see signs of a carbon monoxide issue.
• The heat exchanger may be cracked or there is soot around the burner area.
• Electrical components are overheating or wiring is melted.
• You are unsure about relighting a pilot or testing ignitors.

Summers Plumbing Heating & Cooling provides 24/7 emergency heating service. We are fully licensed, bonded, and insured. We explain findings in plain language before any repair so you can make a confident choice.

Local Insight for Northwest Indiana Homes

Portage, Valparaiso, Chesterton, Hobart, and nearby towns face long stretches of cold with lake-effect snow. Filters load faster, attic ducts can cool quickly, and condensate lines may freeze. Small steps like replacing filters monthly in peak season, insulating visible duct runs, and heat taping condensate drains can prevent no-heat calls. When you need a hand, our nearby team is ready to roll the same day in most cases.

What Homeowners Are Saying

"Bret took the time to explain what was wrong with my furnace, showed me what he was talking about while he was working and gave me the most honest (& easiest to understand) advice I’ve ever gotten. 10/10 Would Recommend!!"
–Bret ., Heating Service

"Mr. Nadratowski is a true professional. Needed the furnace checked because of major house renovations and he noted a couple resolvable issues. He thoroughly explained the needs and functions of the furnace for my future reference and "just in case". I highly recommend him for praise in customer satisfaction. He is an invaluable asset to Summers."
–Mr. Nadratowski ., Heating Service

"Ryan Loftus showed up roughly 1 hour after my initial call into the main office. Ryan was very polite, extremely informative and genuinely honest with me. After performing a few diagnostic tests of my HVAC system, he presented me with a few options for a repair and a few options for a total replacement... We are looking forward to having a new functional HVAC system soon."
–Ryan L., Heating Service

"Jimmy did a great job assessing our furnace today and gave us our options and explained everything very well"
–Jimmy ., Heating Service

Frequently Asked Questions

Why is my furnace running but not heating?

A clogged filter, incorrect thermostat setting, or failed ignitor are common causes. Replace the filter, confirm Heat mode, and check the breaker. If the ignitor is cracked or the pilot will not stay lit, call a pro.

How often should I replace my furnace filter in winter?

Every 30 to 60 days for 1-inch filters, more often with pets or remodeling dust. High-efficiency media filters may last 3 to 6 months. Always follow the manufacturer’s guidance.

What does a professional furnace tune-up include?

Cleaning burners and blower, tightening electrical connections, testing the thermostat, confirming airflow, lubricating moving parts, and safety checks. Our maintenance plan includes two tune-ups per year.

When should I replace rather than repair my furnace?

If the unit is over 10 years old and needs frequent or costly repairs, consider replacement. Safety issues like a cracked heat exchanger also require replacement.

Do you offer 24/7 emergency furnace repair?

Yes. We provide 24/7 emergency heating service across Chesterton, Valparaiso, Portage, and nearby areas. Call us anytime for fast help.

In Summary

Most furnace issues start with airflow, ignition, or safety sensors. Try the quick steps above, then call for expert help if problems continue. For fast, honest furnace repair near me in Chesterton and Northwest Indiana, Summers Plumbing Heating & Cooling is ready 24/7 with licensed, insured technicians and transparent pricing.

Talk To A Furnace Pro Now

• Call: (219) 500-8902
• Visit: https://www.summersphc.com/chesterton/

Need heat restored today in Chesterton, Valparaiso, Portage, Hobart, or nearby? Schedule now for same-day furnace service. Ask about our maintenance plan with two tune-ups per year to prevent breakdowns and lower energy costs.

About Summers Plumbing Heating & Cooling

For more than 40 years, Summers Plumbing Heating & Cooling has helped Northwest Indiana homes stay comfortable through lake-effect winters. We are fully licensed, bonded, and insured, and every technician is drug tested, background checked, and trained on the latest codes and equipment. We repair and install all brands, offer 24/7 emergency service, and stand behind our work with transparent pricing. We also match or beat competitors’ prices and provide maintenance plans that include two professional tune-ups per year. From Chesterton to Valparaiso, you get fast response, clear communication, and long-lasting solutions.