The question isn't whether you need Furnace Repair service in Gaithersburg, MD — it's which contractor you trust to do it right. FH HVAC's answer: a written quote before we start, a MD-licensed technician at your door fast, and a 90-day guarantee documented on every invoice.

If you've dealt with contractors in Gaithersburg, MD who gave you a verbal estimate and handed you an invoice that didn't match — or sent someone who clearly wasn't MD licensed — you know exactly why the bar feels low in this market.
FH HVAC operates on a different standard in Gaithersburg, MD. Every technician we send holds an active MD license, NATE certification, and a current EPA 608 refrigerant credential. Every quote is written and itemized before any work starts. Every completed job carries a 90-day guarantee documented on your invoice. Call +1-844-586-3138 and a live dispatcher picks up — day or night, weekend or holiday.

Licensed, insured, and guaranteed. Every service below is available in Gaithersburg, MD right now.
System failure in Gaithersburg, MD doesn't wait for business hours. A live dispatcher at +1-844-586-3138 routes the nearest MD-licensed tech to your location and gives you an ETA before you hang up. Most Gaithersburg, MD emergency calls resolve on the first visit. Written quote before we start — always.
Emergency line in Gaithersburg, MDFrom a full system replacement to a targeted repair in your Gaithersburg, MD home, our residential technicians don't guess system size. Skipping this step is how contractors install wrongly sized systems that fail in 10 years instead of lasting 20. All MD permits pulled. Parts and labor both warranted.
Schedule Gaithersburg, MD home serviceCommercial HVAC failure in Gaithersburg, MD costs more than discomfort — it costs you customers, productivity, and sometimes compliance. Our commercial team handles rooftop units, large split systems, VRF and chiller work across Gaithersburg, MD — coordinated around your operating hours to minimize disruption. Priority response for commercial service agreement clients.
Gaithersburg, MD commercial pricingIndoor air quality in Gaithersburg, MD is affected by the specific seasonal conditions here — humidity patterns, allergen load, and how airtight homes tend to be in this climate. FH HVAC installs and services HEPA filtration, UV germicidal systems, humidity control equipment, and ERVs matched to Gaithersburg, MD's specific climate demands. Most impactful for households managing asthma or recurring respiratory conditions.
Air quality service in Gaithersburg, MDHeat pump and ductless mini-split demand in Gaithersburg, MD has grown as homeowners understand the efficiency and versatility advantages. Our Gaithersburg, MD technicians are factory-trained on all major brands — Mitsubishi, Daikin, Fujitsu, LG, Bosch — and handle everything from initial installation through refrigerant service.
Heat pump service in Gaithersburg, MDThe Gaithersburg, MD systems that run reliably for 20 years get maintained twice a year. The ones that fail early usually don't. Our Gaithersburg, MD maintenance plan includes two full tune-ups per year, priority scheduling during peak season, a 15% discount on any repair parts and labor, and a written condition report after every visit.
Plan details: +1-844-586-3138Four steps. No surprises. That's the whole model.
A live dispatcher picks up in Gaithersburg, MD — day or night, no exceptions. Not a bot. Not a callback queue. A real person who starts routing a technician immediately.
The nearest MD-licensed technician is routed to your Gaithersburg, MD address. Background-checked, NATE certified, EPA 608 credentialed.
You get the full cost in writing before anything begins in Gaithersburg, MD. Nothing starts until you've reviewed and approved it in writing. What you approve is what you pay.
90 days, parts and labor, documented. If it fails within the window, we return at no charge.
Operating standards, not slogans. Everything on this list is policy at FH HVAC in Gaithersburg, MD.
Verbal estimates in Gaithersburg, MD that change by invoice are how contractors exploit homeowners who don't know to ask. We give you a written quote first. No post-job surprises in Gaithersburg, MD.
Every FH HVAC technician in Gaithersburg, MD carries an active MD contractor license. Ask for documentation before any contractor starts work on your system.
We maintain staffing close to Gaithersburg, MD so average on-site time stays under 60 minutes, even when demand is high.
The guarantee is on the invoice. 90 days, parts and labor. Not a handshake — a documented commitment.
Not voicemail. Not a bot. A live dispatcher who has a technician moving toward your Gaithersburg, MD address within minutes.
"Before I gave anyone access to my home in Gaithersburg, MD, I asked for documentation. FH HVAC was the only contractor who had it ready without hesitation."
— Gaithersburg, MD homeowner, new system installation"Called FH HVAC in Gaithersburg, MD on a Saturday afternoon, had a tech at the door in under an hour, written quote before they started, invoice matched the quote exactly. I've never had an easier contractor experience in Gaithersburg, MD."
"Gaithersburg, MD commercial HVAC emergency on a Friday. FH HVAC had someone there fast, correctly diagnosed a failed capacitor, and had the system running before the event was compromised. Exceptional response time for a commercial call."
"The FH HVAC maintenance plan in Gaithersburg, MD found a developing refrigerant leak at our annual spring check. They fixed it at the plan rate. I did the math — fixing it in July as an emergency would have cost significantly more. The plan pays for itself."

Don't sit with a broken system in Gaithersburg, MD while waiting on a contractor who may or may not show up. Call +1-844-586-3138 — a real dispatcher picks up, routes the nearest tech, and gives you an ETA before you hang up.
📞 +1-844-586-3138 — Furnace Repair in Gaithersburg, MD