Munster HVAC: Reset Your Heating System When It Stops

Estimated Read Time: 12 minutes

Heater not working and rooms getting cold fast? Here is how to safely handle it. In this guide, you will learn how to reset heating system components the right way, spot simple fixes, and know when to call for help. If you need a pro now, our Crown Point team is on call 24/7 with upfront pricing and stocked trucks.

First, safety before you touch the heater

Your safety comes first. If you ever smell gas, hear arcing, or see smoke, leave the home and call your utility or 911. Do not try to reset anything.

For all other situations, do this before a reset:

1. Turn the system to Off on the thermostat.
2. Give the blower or outdoor unit at least 5 minutes to stop.
3. Check that supply and return vents are open and not blocked.

"Very professional. Everyone I've dealt with at Summers has been great. We had a new furnace and a/c installed last year."

Quick checks that fix many heat outages

Small issues often look like big problems. Try these fast checks.

1. Thermostat
   • Confirm Heat mode. Set 3 to 5 degrees above room temp.
   • Replace batteries if the screen is dim or blank.
   • For smart thermostats, verify Wi‑Fi is not overriding your schedule.
2. Power
   • Make sure the furnace or air handler switch is On. It looks like a light switch near the unit.
   • Check the breaker panel. Reset tripped breakers by switching fully Off then On.
3. Airflow
   • Replace a clogged filter. A dirty filter can trip safety switches.
   • Open at least 80 percent of registers. Closed vents overheat a furnace.
4. Gas supply
   • Ensure the gas valve at the appliance is in line with the pipe. If not sure, do not force it. Call a pro.

"Joe did an excellent job. He explained everything and I was very satisfied with the furnance tune up. Thank you"

How to reset heating system components step by step

The exact reset depends on the type of heat you have. Follow the correct section for your system.

Standard gas or electric furnace

1. Turn the thermostat to Off.
2. At the furnace, switch the service power Off. Wait 60 seconds.
3. Replace the air filter if dirty.
4. Turn furnace power On. Set the thermostat to Heat and call for 3 to 5 degrees above room temp.
5. Give it 3 to 5 minutes. Watch for ignition and a steady blue flame on gas units, or warm air after 90 to 120 seconds on electric.

If the furnace has a control board reset button, press it once. Do not press repeatedly.

Heat pump system

1. Turn thermostat to Off.
2. Switch the indoor air handler and the outdoor unit breakers Off. Wait 2 to 3 minutes.
3. Turn breakers On, then set Heat and raise the setpoint.
4. In very cold weather, the unit may enter a defrost cycle. Let it finish before judging performance.

Boiler with radiators or baseboard

1. Turn the boiler’s power switch Off.
2. Check system pressure. Most residential systems run 12 to 15 psi when cool. If near zero, do not reset. Call for service.
3. Turn power On. If your boiler has a reset button on the control, press once.
4. After restart, confirm the circulator pump runs and radiators warm evenly.

Ductless mini‑split

1. Power the indoor head Off with the remote.
2. Turn Off the outdoor disconnect or breaker for 2 minutes.
3. Restore power, then turn the head On and set to Heat.
4. Clear any flashing error codes by following the manufacturer guide. If codes return, schedule service.

"Keith and his partner did an excellent and expedient job in installation of a new heating and air conditioning system on a very cold day."

What a blinking light or error code is telling you

Most furnaces and boilers use flashing lights to report faults.

• Two to three flashes often signal pressure switch or airflow issues.
• Four to five flashes can indicate ignition or flame sensing faults.
• A solid light with no heat may mean the limit switch is open from overheating.

Tip: Write down the code before you reset. It helps a technician diagnose quickly.

"Connor went above and beyond in troubleshooting the issues with the humidifier on the furnace and why it wasn't yet working properly."

If the reset trips again, stop and investigate

A heater that shuts down again is protecting itself. Common causes:

• Dirty filter or blocked return duct
• Flame sensor needs cleaning
• Condensate drain blocked on high efficiency furnaces
• Draft or pressure switch problems
• Overheating due to closed vents or blower failure

Do not press a reset more than once on oil or gas equipment. Repeated resets can flood fuel or stress components.

Thermostat fixes that act like a reset

Thermostats cause many no‑heat calls.

• Replace the batteries every 6 to 12 months.
• For smart thermostats, disable Eco or Away modes during a cold snap.
• Power cycle: remove the thermostat from its base for 30 seconds, then reinstall.
• Recalibrate if rooms feel off. Some models have a temperature offset setting.

"The technician did a good job of explaining what they came to do and he explained what was needed for our heating and cooling systems to keep running efficiently."

Gas furnace specifics: flame sensor, igniter, and venting

If your gas furnace clicks but does not stay lit, check these items before you call.

1. Flame sensor
   • A dirty sensor will not confirm flame and will shut the furnace down. Lightly polishing requires skill. If unsure, stop and schedule service.
2. Hot surface igniter
   • Look for a small glow before ignition. If there is no glow and you have power, the igniter may be cracked.
3. Intake and exhaust
   • High efficiency furnaces use PVC pipes that can ice up in lake effect storms. Clear snow and ice at least 12 inches around the pipes.

Local tip: On windy days near the Historic Courthouse Square in Crown Point, drifting snow can pack intake pipes at ground level.

Heat pump in freezing temps: defrost and lockout

NWI cold snaps can push heat pumps hard.

• Defrost cycle
  • Steam clouds from the outdoor unit are normal during defrost. Do not kill power unless there is a burning smell.
• Auxiliary heat
  • Your system may use electric strips or a furnace during deep cold. If strips are tripping the breaker, call for service.
• Breaker etiquette
  • Wait at least 2 minutes before turning a tripped breaker back On to protect the compressor.

Boiler owners: pressure, air, and circulation checks

Boilers need the right pressure and clear air to move heat.

• Check the pressure gauge when cool. Around 12 to 15 psi is typical.
• Bleed radiators starting with the highest floor to remove air pockets.
• Inspect the condensate neutralizer on high efficiency models. A clogged media can back up drain water and lock the boiler out.

Never add water to a hot boiler. Let it cool first.

"Mike and his helper came in, gave an estimate, and removed a heater from my boiler system out quickly and efficiently."

Ductless mini‑split: common reset outcomes

After a power reset, many mini‑splits work again if the issue was software related. If problems return:

• Clean the indoor filters. Many heads have two mesh screens behind the front panel.
• Wash the outdoor coil gently with a low pressure hose in mild weather.
• Note any error lights. Different flash patterns map to specific faults.

Prevent the next no‑heat event

A little upkeep prevents most surprise shutdowns.

• Replace 1‑inch filters every 30 to 60 days in winter.
• Schedule seasonal tune‑ups. A pro cleans burners, coils, and blowers, checks refrigerant and airflow, tightens electrical connections, and calibrates your thermostat.
• Keep 2 feet of clearance around indoor equipment and 3 feet around outdoor units.
• Install a smart thermostat that provides low temperature alerts.

Members in our maintenance plan get two tune‑ups a year, priority repair service, and discounts on parts. That reduces emergency breakdowns and extends system life.

When to call a pro in Crown Point and Northwest Indiana

Call if you see any of these:

• Gas smell or repeated tripping of the reset
• Breakers that trip again after you reset
• Ice packed on outdoor coils that will not melt in defrost
• Boiler pressure at zero or frequent leaks
• No airflow from vents after the furnace starts

Summers serves Crown Point, Merrillville, Schererville, Munster, Highland, and more across Lake County. We arrive fast, day or night, with fully stocked trucks. You approve the price before work starts, and our work is backed by warranties.

"After a tenant in one of our 3-flats called to let us know that the heat wasn’t kicking on, I found Summers on Google and gave them a call based on their positive reviews... They began work around 2pm and completed the installation around 4:30pm."

Special Offers for Crown Point Homeowners

• Special Offer: Heating tune‑up for $69. Schedule by 11/30/25. Must present coupon at time of service. Not combinable with other offers.
• Special Offer: $69 Precision Heating or AC Tune Up with No Break Down Guarantee. Must present coupon at time of service. Not combinable with other discounts.
• Special Offer: Free Service Call on any paid heating repair. This month only.
• Financing: Payments as low as $75 per month on a high efficiency furnace. Terms may apply. Call for details.
• Free Quotes: We provide free quotes on furnace installation and heating services.

Frequently Asked Questions

How do I safely reset my furnace?

Turn the thermostat to Off, cut power at the furnace switch for 60 seconds, restore power, then set Heat a few degrees higher. Do not press a reset button more than once.

Why does my heater work after I reset it, then stop again?

A safety switch is likely tripping from airflow, ignition, or drain issues. Replace the filter and open vents. If it trips again, stop and call a pro to prevent damage.

Can a smart thermostat cause no heat?

Yes. Dead batteries, Eco modes, or schedules can block a heat call. Replace batteries, disable Eco, and raise the setpoint. Power cycle the thermostat if needed.

What should boiler pressure be when cool?

Most residential boilers are around 12 to 15 psi when cool. If it reads near zero or drops often, do not reset. Schedule service.

When should I skip DIY and call emergency service?

If you smell gas, see smoke, have repeat breaker trips, or the reset trips again. Our team is available 24/7 in Crown Point and nearby cities.

Bottom Line

A careful reset can bring heat back fast, but repeat trips mean a real issue. Keep filters clean, clear vents, and schedule tune‑ups to prevent lockouts. If you need help with how to reset heating system steps or urgent repair in Crown Point, we are ready 24/7.

Schedule Service Now

Call Summers Plumbing Heating & Cooling at (219) 500-8867 or visit https://www.summersphc.com/crown-point/ to book online. Mention our $69 heating tune‑up or Free Service Call on any paid repair. We serve Crown Point, Hammond, Gary, Merrillville, Schererville, East Chicago, Highland, Munster, St. John, and Dyer.

About Summers Plumbing Heating & Cooling

For 40+ years, homeowners in Crown Point and Northwest Indiana have trusted Summers Plumbing Heating & Cooling. We are BBB accredited, fully licensed, bonded, and insured. Every technician is background checked and drug tested. We offer 24/7 emergency service, upfront pricing you approve before work starts, price‑match or beat guarantee, flexible financing, and strong labor and equipment warranties. Our trucks are fully stocked for fast, tidy service, and we provide free second opinions.