HVAC emergencies are never convenient or easy. When your heat or AC suddenly stops working, the experts at Martens Heating & Cooling have your back with 24/7 emergency HVAC services and helpful tips to protect your home and family.
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What Counts as an HVAC Emergency?
Sometimes homeowners are a bit hesitant to reach out because they’re not sure if something is really an “emergency” or they’re concerned about those fees. Here are a few situations where you shouldn’t wait to call for help because it could impact your health and safety:
Furnace Isn’t Working in Freezing Weather
If your furnace stops working during freezing temps, that’s an emergency. Besides comfort for you and your family, no heat can cause pipes to freeze and burst, leading to extensive damage and expensive repairs.
Strange Smells or Smoke
If you smell gas, burning plastic, or smoke coming from your vents or furnace, shut the system off immediately and call for emergency HVAC service. These can be signs of a gas leak or electrical issue that poses a safety risk for you and your family.
System Won’t Turn Off
If your HVAC system keeps running no matter what you do, it could mean a short circuit or faulty control board. This can cause overheating, equipment damage, and a potential fire if ignored.
Water Leaks or Ice Buildup
Leaking water or ice around your unit can mean something’s seriously wrong, like a blocked drain, frozen coil, or refrigerant leak. Catching these issues early on can prevent damage to your home and system and minimize future repairs.
When It Isn’t an HVAC Emergency
While we get that any HVAC issue is frustrating and concerning, not everything is an emergency or danger to you and your family. Some HVAC issues can wait until regular business hours, including:
- Uneven heating or cooling in certain rooms
- Minor noise changes
- A clogged air filter
- Regular maintenance or tune-ups
These are generally signs that you might need a repair or replacement soon, but there’s no immediate risk.
If you’re unsure whether something is an emergency HVAC issue, it’s always better to call and ask. A trusted technician can help determine whether you need immediate service or can safely wait. Ultimately, waiting until normal business hours when possible will likely save you money on after-hours and emergency fees.
What to Do in an HVAC Emergency
If your HVAC system stops working or something doesn’t seem right, don’t panic. Shut down the system, check for immediate dangers, and call a trusted emergency HVAC technician right away.
Let’s break down exactly what to do while you wait for help to arrive.
- Turn off your system. Shut down your furnace, AC, or heat pump at the thermostat and the breaker. This helps prevent further damage or hazards until an HVAC technician can come take a look.
- Check for obvious issues. Common culprits include tripped breakers, dirty filters, and blocked vents. Sometimes, a quick reset or filter change can solve your problem.
- Leave if you smell gas or burning. Grab your family and exit your home immediately. Call your utility company or 911 before calling us.
- Protect your home from freezing. If your furnace is out and its freezing temperatures, open cabinet doors to allow warm air to reach pipes and put towels around them. Use space heaters safely to prevent freezing and keep your family comfortable.
- Call a trusted emergency HVAC technician. Once you and your family are safe, contact Martens Heating & Cooling for emergency HVAC services. We’ll walk you through the next steps while dispatching a technician to your home.
Need emergency HVAC services for your Fox Cities home?
Wisconsin Homeowners Trust Martens Heating & Cooling

When emergencies happen, you need a team that shows up fast and does the job right. Based in Omro, we offer 24/7 emergency HVAC service across the Fox Cities and Northeastern Wisconsin, including
We believe in honest, straightforward service and advice when you need it most. Our emergency HVAC services include:
- Emergency furnace repair (gas and electric)
- Boiler and radiant heat repairs
- Emergency AC repair and replacement
- Heat pump service
- Thermostat troubleshooting and replacement
- Electrical and safety diagnostics
- Frozen coil and refrigerant leak repair
- Rapid furnace and AC replacements when repair isn’t possible
Our local technicians are trained to handle every make and model, and we pride ourselves on honest, straightforward service. We’ll fix the problem, explain what happened, and help prevent it from happening again.
I’ve been using Martens since I moved into my current home. They are always quick to respond with emergencies and made replacing my Central AC seamless. They also came out to fix my furnace during my first winter in the house. — Matthew S.
Martin’s came out when the hot water portion of my boiler quit working. They were fast, efficient and very professional. I’m pleased with the service and would highly recommend them! — Jackie S.
I called and they came within the hour. Had a bad leak in my boiler he had the part in the truck and replaced it within an hour. Thank you so much. Tech was curious and knew his job well. — Patrick K.

