The question isn't whether you need Heat Pump 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. Calling +1-844-586-3138 at any hour connects you to a real person who confirms your ETA before you hang up.

All six services are available in Gaithersburg, MD — performed by MD-licensed technicians and backed by written pricing and our 90-day guarantee.
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. Our trucks carry the parts most common in Gaithersburg, MD's HVAC systems, so first-visit repairs are the standard, not the exception.
Gaithersburg, MD Emergency: +1-844-586-3138Whether your Gaithersburg, MD home needs a new system or a specific repair, our residential team starts with the Manual J load calculation that determines what your home actually needs. 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.
Book a Gaithersburg, MD technicianA failed HVAC system in your Gaithersburg, MD office, retail location, or commercial facility means real money lost. 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, MDMore Gaithersburg, MD homeowners are choosing heat pumps and ductless systems for additions, garages, and conversions where running ductwork through existing walls isn't practical. 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.
Ductless install: +1-844-586-3138The Gaithersburg, MD systems that run reliably for 20 years get maintained twice a year. The ones that fail early usually don't. Two tune-ups annually, priority dispatch year-round, 15% off parts and labor, refrigerant checks, coil cleaning, and a written condition report every visit.
Plan details: +1-844-586-3138No mystery, no fine print. This is the exact process for every Gaithersburg, MD job we take on.
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. Every credential verified before they arrive at your door.
You get the full cost in writing before anything begins in Gaithersburg, MD. The number you sign is the number on your invoice. We never add charges after work is complete.
The job gets done and backed by a 90-day parts and labor guarantee documented on your invoice.
These are the operating commitments behind every Gaithersburg, MD job. Verifiable. Documented.
What you approve is what you pay. Always. Itemized, signed, and binding before we begin.
Every FH HVAC technician in Gaithersburg, MD carries an active MD contractor license. Ask for documentation before any contractor starts work on your system.
Regional technician positioning throughout Gaithersburg, MD keeps response times under 60 minutes in most markets — including during peak summer and winter demand.
Every Gaithersburg, MD repair we complete carries a 90-day parts and labor guarantee printed on your invoice. If it fails, we return at no charge — no debate required.
Calling +1-844-586-3138 at 2 AM in Gaithersburg, MD gets a person who routes a technician immediately.
"I asked for proof of MD licensing before letting anyone in. Two contractors couldn't produce it. FH HVAC sent documentation in under two minutes."
— Gaithersburg, MD homeowner, new system installation"I've dealt with three other HVAC contractors in Gaithersburg, MD in the past two years. Every one had some billing issue, some miscommunication, some problem. FH HVAC showed up fast, gave me a written quote, and billed me exactly that amount. This should be the standard."
"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 — Heat Pump Repair in Gaithersburg, MD