Emergency HVAC Services – Available 24/7
Whether it’s a freezing night without heat or a sweltering summer day with no A/C, our certified technicians are on call and ready to respond—day or night.
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Fast, Reliable Help When You Need It Most
HVAC emergencies don’t wait for regular business hours—and neither do we. At Dumars HVAC Services, we provide 24/7 emergency heating and cooling repair to homeowners and businesses across Gaithersburg, Frederick, Southern Washington D.C., and surrounding Maryland areas.
Gas furnace issues or potential CO2 concerns
Gas furnace problems can pose serious risks—especially when carbon monoxide is involved. At Dumars HVAC Services, we treat these emergencies with urgency and care, responding 24/7 to issues like gas leaks, strange smells, pilot light failures, and malfunctioning heat exchangers.
Refrigerant leaks or frozen coils
Refrigerant leaks and frozen coils are common signs that your cooling system is under serious stress—and ignoring them can lead to bigger problems or total system failure. At Dumars HVAC Services, we provide fast, 24/7 response to diagnose the cause, safely handle refrigerant, and restore proper airflow and function.
Why Choose Us?
At Dumars HVAC Services, we combine professional expertise with a customer-first approach to deliver HVAC solutions you can depend on. With over 8 years of hands-on experience, we are fully licensed in refrigeration and air conditioning and EPA 608 certified for safe refrigerant handling. We offer fast, friendly, and affordable service—available 24/7 for emergencies—and we treat your home or business with the same care we’d give our own.
Testimonials
“We needed a full HVAC replacement for our office, and Dumars HVAC handled it flawlessly. From consultation to installation, they were professional, efficient, and respectful of our workspace. Highly recommend them for any commercial HVAC needs!”
Sarah M.
“Our heat went out in the middle of the night, and I was panicking with a baby in the house. Dumars HVAC picked up immediately and arrived in under an hour. They fixed the issue quickly and didn’t overcharge. Their 24/7 service is no joke!”
James R.
“We had a new furnace and smart thermostat installed, and the whole process was smooth. The team was on time, neat, and explained how to use everything. Our home feels so much more comfortable, and our energy bills are already lower!”
Linda T.
“I’ve worked with a few HVAC companies in the past, but Dumars is by far the best. Their communication was excellent, prices were fair, and the quality of work exceeded expectations. I’ve already recommended them to my neighbors!”
Carlos D.
“They handled our seasonal maintenance and caught a problem before it turned into an emergency. I appreciate how thorough and honest they were. It’s hard to find dependable service these days, but Dumars HVAC definitely delivers.”
Monica S.
“I can’t say enough good things about Dumars HVAC Services. When our A/C stopped working on one of the hottest days of summer, they answered our call immediately and had a technician out within a few hours. The team was friendly, professional.!”
Nathan B.