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Emergency HVAC Contractors in Colesville, MD (2026)

Top 50 of 1,116 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

If you smell gas, leave the building now and call your gas utility or 911 from outside.

The short answer

  1. 1

    #1 for emergency heating and cooling in Colesville: Len The Plumber Heating & Air, LLC, open 24/7.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

Top emergency HVAC contractors in Colesville at a glance

Top emergency HVAC contractors in Colesville at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Len The Plumber Heating & Air, LLC654.6★ (8,136)Silver Spring, 4 mi away24/7
2GAC Services654.9★ (6,908)Gaithersburg, 11 mi away24/7
3F.H. Furr Plumbing, Heating, Air Conditioning & Electrical654.7★ (5,985)Rockville, 7 mi away24/7
4Presidential, Inc.634.9★ (1,701)Gaithersburg, 11 mi away24/7
5Cyprus Air Heating, Cooling and Fireplaces634.7★ (1,402)Rockville, 7 mi away24/7
6Michael Bonsby HVAC, Plumbing & Electrical634.8★ (2,083)Gaithersburg, 11 mi away24/7
7JC & JC HVAC634.7★ (503)Silver Spring, 2 mi away24/7
8Vito Services634.7★ (1,351)Rockville, 8 mi away24/7
9Parker Pearce Service Experts634.8★ (1,700)Gaithersburg, 11 mi away24/7
10United Air Temp634.8★ (1,306)Greenbelt, 9 mi away24/7

Call an emergency HVAC contractor in Colesville now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency HVAC contractors in Colesville, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 1,116 is on the HVAC contractors page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  2. #2 GAC Services

    Based in Gaithersburg, 11 mi away

    65/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.9★ from 6,908 Google reviews, listed on Google as “Heating contractor”.

    • 4.9★ from 6,908 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    227 E Deer Park Dr, Gaithersburg, MD 20877
    View profile for GAC Services(301) 202-1641

  4. #4 Presidential, Inc.

    Based in Gaithersburg, 11 mi away

    63/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.9★ from 1,701 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 1,701 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8000 Cessna Ave, Gaithersburg, MD 20879
    View profile for Presidential, Inc.(301) 719-3315

  7. #7 JC & JC HVAC

    Based in Silver Spring, 2 mi away

    63/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.7★ from 503 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 503 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1614 Maydale Dr, Silver Spring, MD 20905
    View profile for JC & JC HVAC(301) 364-3729

  8. #8 Vito Services

    Based in Rockville, 8 mi away

    63/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.7★ from 1,351 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 1,351 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    681 Southlawn Ln, Rockville, MD 20850
    View profile for Vito Services(301) 861-3908

  10. #10 United Air Temp

    Based in Greenbelt, 9 mi away

    63/100CR Score

    Ranked #10 because of its Google rating and trade focus: 4.8★ from 1,306 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 1,306 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7255 Hanover Pkwy Ste A, Greenbelt, MD 20770
    View profile for United Air Temp(240) 713-3314

  11. #11 CroppMetcalfe

    Based in Fairfax, 19 mi away

    62/100CR Score

    Ranked #11 because of its Google rating and trade focus: 4.8★ from 7,638 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 7,638 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8421 Hilltop Rd, Fairfax, VA 22031
    View profile for CroppMetcalfe(703) 420-5030

  12. #12 Michael & Son Services

    Based in Alexandria, 21 mi away

    62/100CR Score

    Ranked #12 because of its Google rating and trade focus: 4.7★ from 15,537 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 15,537 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5740 General Washington Dr, Alexandria, VA 22312
    View profile for Michael & Son Services(800) 948-6453

  14. #14 ARS / Rescue Rooter

    Based in Laurel, 10 mi away

    62/100CR Score

    Ranked #14 because of its Google rating and trade focus: 4.4★ from 3,510 Google reviews, listed on Google as “HVAC contractor”.

    • 4.4★ from 3,510 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    9010 Maier Rd # 105, Laurel, MD 20723
    View profile for ARS / Rescue Rooter(301) 276-4499

  15. #15 JDL HVAC & Plumbing Services

    Based in Laurel, 8 mi away

    62/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.8★ from 678 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 678 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    14300 Cherry Lane Ct Ste 116, Laurel, MD 20707
    View profile for JDL HVAC & Plumbing Services

  18. #18 Thomas E Clark Inc

    Based in Silver Spring, 5 mi away

    62/100CR Score

    Ranked #18 because of its Google rating and trade focus: 4.8★ from 299 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 299 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2412 Linden Ln, Silver Spring, MD 20910
    View profile for Thomas E Clark Inc(301) 608-0550

  23. #23 John C. Flood

    Based in Alexandria, 21 mi away

    61/100CR Score

    Ranked #23 because of its Google rating and trade focus: 4.8★ from 4,976 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 4,976 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6430 General Green Way, Alexandria, VA 22312
    View profile for John C. Flood(571) 605-7008

  24. #24 Zapata’s HVAC Systems

    Based in Silver Spring, 2 mi away

    61/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.9★ from 107 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 107 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    12001 Old Columbia Pike unit g2, Silver Spring, MD 20904
    View profile for Zapata’s HVAC Systems(202) 480-7527

Top 50 of 1,116 HVAC contractors by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

HVAC contractors in Colesville, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26EzGreen Air duct And Dryer Vent Cleaning614.9★ (130)5 mi
27Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical614.8★ (4,514)22 mi
28AMS Air Conditioning & Heating614.9★ (116)5 mi
29United Air Temp614.8★ (1,775)18 mi
30Grove Heating & Cooling614.9★ (1,156)18 mi
31Krafft Service Corporation614.9★ (1,631)20 mi
32Cardinal Plumbing Heating & Air Inc604.9★ (2,958)23 mi
33One Hour Air Conditioning & Heating® of Gaithersburg604.8★ (302)10 mi
34Shemtov Systems Heating & Air Conditioning604.9★ (57)2 mi
35Snell Home Services604.8★ (5,283)25 mi
36AZA heating, cooling, plumbing & construction605.0★ (959)19 mi
37Belair Engineering and Service Company, Inc.604.9★ (1,421)20 mi
38Metro Services HVAC604.9★ (298)11 mi
39Meade's Heating and Air605.0★ (1,428)22 mi
40AllTech Services, Inc604.9★ (2,807)25 mi
41Cycle Heating and Cooling, LLC604.9★ (77)6 mi
42JV heating and air services604.8★ (114)8 mi
43Michael & Son Services604.9★ (1,501)23 mi
44United Air Temp604.8★ (2,161)23 mi
45AVS Heating and Air Conditioning Bethesda - Appliance, Heating, AC Install, Repair Maintenance Service604.8★ (104)8 mi
46John Nugent & Sons604.8★ (1,701)22 mi
47Caffi Services594.9★ (508)18 mi
48United Air Temp594.8★ (1,318)22 mi
49EzGreen Air Duct And Dryer Vent Cleaning594.9★ (90)9 mi
50F.H. Furr Plumbing, Heating, Air Conditioning & Electrical594.8★ (2,314)25 mi

How we ranked emergency HVAC contractors in Colesville

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed from
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency HVAC contractors in Colesville: questions

Which HVAC contractors in Colesville are open 24/7?

25 on this list post 24/7 hours, including Len The Plumber Heating & Air, LLC, GAC Services, F.H. Furr Plumbing, Heating, Air Conditioning & Electrical, Presidential, Inc. and Cyprus Air Heating, Cooling and Fireplaces.

Who is ranked #1 for emergency heating and cooling in Colesville, MD?

Len The Plumber Heating & Air, LLC is #1, with a CR Score of 65 out of 100 on emergency weights.

How are emergency HVAC contractors in Colesville ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the HVAC contractor arrives?

If you smell gas, leave the building now and call your gas utility or 911 from outside.

How many emergency HVAC contractors here list a phone number?

24 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Colesville

  1. October 2026: CR Scores recalculated for 1,116 hvac contractors serving Colesville.
  2. October 2026: 11 duplicate listings merged.

More emergency and heating and cooling pages