
HVAC Contractor in Gaithersburg, MD
Family-owned heating & cooling for Montgomery County. Fast AC and furnace repair, high-efficiency installations, and 24/7 emergency service — done right by licensed local technicians.
- Same-day service available
- Free written estimates
- 24/7 emergency repair
- Financing options
Get Your Free Estimate
Fast response · No obligation · Upfront pricing
HVAC Emergency in Gaithersburg? Start Here
No heat during a freeze or no cooling in a heat wave is stressful — and guessing can turn a repair into a bigger problem. Take a few safe steps first, then call. We answer 24/7 and give you immediate guidance before anyone authorizes work.
The First 30 Minutes: Stay Safe
- 1Set the thermostat to off if the system is making an unsafe noise, leaking water, or producing an unusual odor.
- 2If you smell gas, leave the home and call 911 and your gas utility first — before you do anything else.
- 3For smoke, electrical arcing, or a burning smell, leave the equipment off and don't repeatedly reset the breaker.
- 4Photograph the thermostat, the model/serial plate, any error code, and the filter — it speeds up the diagnosis.
- 5Call with your symptom, system type, and address so we can give you safe guidance and dispatch the right help.
Never handle refrigerant, open a furnace cabinet, or attempt gas, combustion, or electrical repairs yourself — those require a licensed technician.
How Urgent Is It?
Call immediately
Gas odor, smoke, electrical arcing, a burning electrical smell, or unusual combustion behavior.
Call promptly
No heat, no cooling, a frozen coil, an active condensate leak, short cycling, or a system that won't start.
Schedule a visit
Rising utility bills, uneven rooms, humidity, weak airflow, recurring repairs, or a system nearing replacement.
Complete Heating & Cooling Services
From emergency repairs to full system installations, P&Y handles every HVAC need for homes and businesses across Montgomery County.
AC Repair
Same-day diagnosis and honest fixes for a system that won't cool.
Learn moreAC Installation & Replacement
Right-sized, high-efficiency systems installed by licensed pros.
Learn moreFurnace & Heating Repair
Fast, safe heat restored — ignition, blower, and no-heat fixes.
Learn moreFurnace Installation & Replacement
Efficient, properly-sized furnaces installed and permitted right.
Learn moreHeat Pump Repair & Installation
One system for year-round comfort — repaired, replaced, and installed.
Learn moreHVAC Maintenance & Tune-Ups
Seasonal tune-ups that prevent breakdowns and lower energy bills.
Learn more24/7 Emergency HVAC Repair
Around-the-clock response when heat or cooling fails without warning.
Learn moreEmergency AC Repair
AC down in the heat? Fast overnight and weekend cooling repairs.
Learn moreThe Local HVAC Company You Can Trust
We built our reputation on honest advice, quality work, and treating your home like our own.
Family-Owned & Local
Serving Montgomery County for over a decade. When you call, you reach neighbors — not a national call center.
Licensed & Insured
MD HVAC Master License #96254 (Pedro Alcantara). Every job is done to code with proper permits.
24/7 Emergency Service
Heat out in a freeze? AC down in a heat wave? We answer around the clock and prioritize urgent calls.
Upfront, Honest Pricing
Written quotes before any work begins. We give straight repair-versus-replace advice — never a hard sell.
5.0★ Reputation
112+ reviews from Montgomery County homeowners who trust us with their comfort.
Full-Service HVAC
Repair, installation, maintenance, heat pumps, ductwork, and indoor air quality — one trusted team for all of it.
Honest Gaithersburg HVAC Pricing — No Surprises
Too many companies promise “upfront pricing” and publish no numbers. Here is real, researched local cost context so you can plan — always confirmed with a written scope before any work begins. These are ranges for the Gaithersburg market, not a quote.
Diagnostic fee
$89–$175
Ask if it's credited toward the repair
Typical HVAC repair
$160–$675
Varies by the failed component
Full-system replacement
$7,000–$14,000
Depends on capacity, ducts & permits
Central AC tune-up
~$122
Seasonal maintenance benchmark
Common repair component ranges
- Capacitor: $215–$435
- Contactor: $220–$485
- Condenser fan motor: $285–$775
- Ignitor or flame sensor: $115–$330
- Refrigerant leak or recharge: $375–$1,150
Which HVAC Option Fits Your Home?
Cost, life, and coverage depend on the equipment, install quality, and your property. Use the questions column to know what to ask for in writing.
| Option | Cost Context | Best For Gaithersburg Homes | Questions to Ask |
|---|---|---|---|
| Repair | $160–$675 typical; component scope varies | An identifiable failure on otherwise serviceable equipment | What failed, what caused it, and is the repair warranted? |
| Full-system replacement | $7,000–$14,000 researched context | Aging equipment, repeated failures, or major efficiency concerns | Is Manual J sizing, ductwork, permits, startup & disposal included? |
| Heat pump | Varies by capacity, electrical scope & ductwork | One system for heating and cooling with better humidity planning | How are backup heat, defrost & electrical requirements handled? |
| Furnace + AC | Varies by equipment & installation scope | Homes keeping separate heating and cooling equipment | Are venting, coil, refrigerant circuit & duct transitions included? |
| Maintenance | Central-AC tune-up benchmark ~$122 | Spring cooling and early-fall heating preparation | Which visits, parts, priority terms & exclusions are included? |
| Indoor air quality | Verified after an on-site evaluation | Humidity, dust, odors, or persistent comfort complaints | Will airflow, duct condition & dehumidification load be measured? |
Not sure whether to fix or replace? Read our guides to AC installation cost in Montgomery County and heat pump vs. furnace, or ask us for an honest, no-pressure comparison.
Licensed, Permitted & Properly Sized
Verifiable credentials protect your home and your investment. Here's exactly what we bring to every job in Montgomery County — no vague claims.
MD HVACR License
Master License #96254 (Pedro Alcantara). Verify it anytime through the Maryland HVACR Board lookup.
EPA Section 608
Required certification for any technician who opens a refrigerant circuit. Refrigerant is never “topped off” without finding the leak first.
ACCA Manual J Sizing
We size new systems to your actual home's load — structure, windows, insulation, and ductwork — instead of repeating an old nominal size by habit.
Montgomery County Permits
We coordinate permits and inspections with the Department of Permitting Services (DPS) and WSSC where gas, electrical, or refrigerant work applies.

A Family Business Built on Comfort & Trust
P&Y Heating and Cooling is a small, family-owned company that has served Montgomery County for over a decade. Led by master technician Pedro Alcantara, our priority is simple: customer service, quality, and your comfort.
We're licensed, insured, and available around the clock — because HVAC problems don't wait for business hours. Whether it's a midnight no-heat call or a planned system upgrade, you get honest advice and workmanship we stand behind.
- MD HVAC Master License #96254 — Pedro Alcantara
- Serving Montgomery County for over a decade
- Residential & commercial HVAC experts
- Free estimates and second opinions
Serving Gaithersburg & All of Montgomery County
Based in Gaithersburg, we know the neighborhoods we serve — the access, HOA coordination, humidity, and older-home quirks that shape each visit.
Kentlands
HOA and architectural coordination when outdoor equipment, line sets, or visible work may change.
Recurring comfort issues and tight equipment access on aging planned-community systems.
Older-home duct and electrical conditions confirmed before we quote — ductless where ductwork won't fit.
Homeowners comparing replacement, maintenance, humidity, and heat-pump options on larger homes.
Washingtonian Center
A recognizable local landmark reference — we confirm your exact service address before dispatch.
More Montgomery County communities we serve
What Our Neighbors Say
P&Y (Pedro) and his crew were absolutely outstanding. My unit was about 20 years old and giving problems. He was very responsive and made an appointment the same day. He not only told me the issue but gave me options — a repair price and a price on a new unit — even knowing the unit was 20 years old. Other companies just told me to change the unit. His crew spent almost 7 hours and tested it so it worked perfectly. Reasonable and great pricing than these big box companies.
Sandeep Visveswaran
Verified Google review
AC Installation
Great service and very honest. My parents had an HVAC issue where they called two different companies and both said to replace the whole unit. We decided to go for a 3rd opinion and contacted P&Y. It turned out to be a simple fix.
Mario Velarde
Verified Google review
AC Repair
Pedro found and repaired the problem with our AC that others had missed. He was prompt, professional and very pleasant to deal with. Very important to us was that the cost was reasonable AND that he concentrated on fixing the AC instead of trying to sell us a new one. I strongly recommend him.
Norma Neuberg
Verified Google review
AC Repair
Absolutely outstanding service. Our heat went out during extremely cold weather with 30+ mph winds in the DC/Maryland area, and this company came through when it mattered most. Pedro came out on a Saturday night around 8 PM, after finishing another job in Virginia, and still took the time to get our heat back up and running. That level of dedication is rare.
Sheldon D'Silva
Verified Google review
Emergency Heating Repair
10/10 recommend! As new homeowners, we truly appreciated how professional, knowledgeable, and patient the entire team was. They clearly explained the work and taught us how to properly use and maintain our new HVAC system. When we later had an issue with the ducts, they kindly returned, identified the problem, and saved us a significant amount of money.
Silvia Garcia
Verified Google review
Heating System Installation
I contracted with P&Y to replace my HVAC system — furnace, evaporator and condenser/compressor unit. They were on time, clean and professional. Price and warranty were the best I found; 5 previous estimates were significantly higher. I highly recommend P&Y!
Gene Verzi
Verified Google review
HVAC Replacement
From Our Blog

How to Prevent Frozen Pipes and Furnace Failures This Winter
A furnace failure in deep cold can quickly lead to frozen, burst pipes. Here's how to prevent both disasters before they happen.
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Furnace Blowing Cold Air? Troubleshooting Before You Call
A furnace that runs but blows cold air usually has a simple explanation. Here's what to check safely before calling a technician.
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Surviving Maryland Winters: Is Your Heating System Ready?
Maryland winters bring hard freezes and snow. Here's how to make sure your heating system is ready before the first cold snap catches you off guard.
Read articleGet in Touch
Reach out any time for service, a free estimate, or a second opinion. We're here 24/7 for Montgomery County.
Frequently Asked Questions
Answers to common questions about HVAC service in Gaithersburg and Montgomery County.
What HVAC services does P&Y provide in Gaithersburg, MD?
How much does HVAC repair cost in Gaithersburg?
How much does AC replacement cost in Gaithersburg, MD?
Are you licensed and available 24/7?
What should I do first when my HVAC system fails?
How do I decide whether to repair or replace my HVAC system?
Do you handle permits and inspections in Montgomery County?
When should I schedule HVAC maintenance?
What should I do if my furnace smells like gas or burns electrically?
Why does Manual J sizing matter for a new system?
What credentials should I verify before hiring an HVAC contractor?
Ready for Reliable Comfort?
Family-owned, licensed, and available 24/7. Call now for fast service and a free estimate across Montgomery County.
- 5.0★ (112+ reviews)
- Licensed & Insured
- 24/7 Emergency Service
