Skip to content
ContractorsRanked

Emergency HVAC Contractors in Linganore, MD (2026)

Top 50 of 311 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 Linganore: GAC Services, 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 Linganore at a glance

Top emergency HVAC contractors in Linganore at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1GAC Services634.9★ (6,908)Gaithersburg, 21 mi away24/7
2One Hour Air Conditioning & Heating® of Mount Airy634.7★ (852)Mount Airy, 6 mi away24/7
3Wenbrooke Services - Electrical, Plumbing, Heating and Air624.8★ (1,208)Frederick, 13 mi away24/7
4Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical624.8★ (932)Frederick, 12 mi away24/7
5F.H. Furr Plumbing, Heating, Air Conditioning & Electrical624.7★ (1,847)Eldersburg, 15 mi away24/7
6Warner Service624.8★ (537)Frederick, 10 mi away24/7
7Presidential, Inc.624.9★ (1,701)Gaithersburg, 19 mi away24/7
8Frederick Air Inc624.8★ (414)Frederick, 10 mi away24/7
9Michael Bonsby HVAC, Plumbing & Electrical624.8★ (2,083)Gaithersburg, 19 mi away24/7
10F.H. Furr Plumbing, Heating, Air Conditioning & Electrical614.7★ (5,985)Rockville, 24 mi away24/7

Call an emergency HVAC contractor in Linganore 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 Linganore, 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 311 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.

  1. Ranked #1 in Linganore

    #1 GAC Services

    Based in Gaithersburg, 21 mi away

    63/100CR Score

    Ranked #1 because of its Google rating and review volume: 4.9★ from 6,908 Google reviews.

    • 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

  6. #6 Warner Service

    Based in Frederick, 10 mi away

    62/100CR Score

    Ranked #6 because of its Google rating and trade focus: 4.8★ from 537 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 537 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    217 Monroe Ave, Frederick, MD 21701
    View profile for Warner Service(301) 200-9774

  7. #7 Presidential, Inc.

    Based in Gaithersburg, 19 mi away

    62/100CR Score

    Ranked #7 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

  8. #8 Frederick Air Inc

    Based in Frederick, 10 mi away

    62/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.8★ from 414 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 414 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3 King Ave, Frederick, MD 21701
    View profile for Frederick Air Inc(301) 845-5652

  15. #15 United Air Temp

    Based in Frederick, 15 mi away

    61/100CR Score

    Ranked #15 because of its Google rating and trade focus: 4.7★ from 928 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 928 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5305 Jefferson Pike Suite 5, Frederick, MD 21703
    View profile for United Air Temp(240) 680-9304

  17. #17 Urbana HVAC

    Based in Ballenger Creek, 11 mi away

    61/100CR Score

    Ranked #17 because of its Google rating and trade focus: 5.0★ from 182 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 182 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Urbana HVAC(240) 723-3860

  18. #18 closed

    Based in Walkersville, 11 mi away

    61/100CR Score

    Ranked #18 because of its Google rating and trade focus: 4.8★ from 240 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 240 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for closed(301) 900-8593

  22. #22 Wyant Service Experts

    Based in Frederick, 13 mi away

    60/100CR Score

    Ranked #22 because of its Google rating and trade focus: 4.8★ from 165 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 165 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4959 New Design Rd, Frederick, MD 21703
    View profile for Wyant Service Experts(301) 781-7637

  23. #23 Farnen & Dermer

    Based in Owings Mills, 23 mi away

    60/100CR Score

    Ranked #23 because of its Google rating and trade focus: 4.8★ from 931 Google reviews, listed on Google as “HVAC contractor”.

    • 4.8★ from 931 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    10500 Reisterstown Rd, Owings Mills, MD 21117
    View profile for Farnen & Dermer(410) 367-7777

  24. #24 Triple E

    Based in Reisterstown, 21 mi away

    59/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.9★ from 469 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 469 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    655 Main St #1959, Reisterstown, MD 21136
    View profile for Triple E(410) 833-1133

  25. #25 Vito Services

    Based in Rockville, 24 mi away

    59/100CR Score

    Ranked #25 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

Top 50 of 311 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 Linganore, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Prestige Home Services595.0★ (61)11 mi
27Brick Street Plumbing & HVAC594.2★ (364)11 mi
28Fire n Ice Hvac, Inc595.0★ (90)13 mi
29Metro Services HVAC594.9★ (298)21 mi
30Making Air Right594.9★ (361)22 mi
31Clarksburg Heating584.9★ (60)14 mi
32Homeland Heating and Air Conditioning585.0★ (25)10 mi
33United Air Temp584.9★ (180)21 mi
34ClemAIR Heating & Cooling, LLC585.0★ (9)5 mi
35M&M Welding and Fabricators, Inc.584.7★ (12)6 mi
36P&Y Heating and Cooling585.0★ (85)19 mi
37Skyline Heating and Air585.0★ (30)13 mi
38Right-A-Way Heating & Cooling575.0★ (17)10 mi
39Michael & Son Services574.0★ (88)12 mi
40Mario Bro, LLC575.0★ (53)19 mi
41Prime AC Repair Frederick575.0★ (15)12 mi
42Long Mechanical Services LLC575.0★ (19)14 mi
43Siegman Forced Air Systems, Inc.574.7★ (30)15 mi
44Precision Heating & Cooling, Inc.572.8★ (12)5 mi
45Apple Plumbing, Heating, & Air565.0★ (216)14 mi
46United Air Temp564.7★ (75)21 mi
47Brothers HVAC LLC564.9★ (76)23 mi
48Beltway Air Conditioning, Heating & Plumbing564.9★ (90)24 mi
49Witkowski Mechanical564.6★ (40)18 mi
50JLB Mechanical Heating & Cooling, Inc.565.0★ (16)16 mi

How we ranked emergency HVAC contractors in Linganore

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 Linganore: questions

Which HVAC contractors in Linganore are open 24/7?

25 on this list post 24/7 hours, including GAC Services, One Hour Air Conditioning & Heating® of Mount Airy, Wenbrooke Services - Electrical, Plumbing, Heating and Air, Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical and F.H. Furr Plumbing, Heating, Air Conditioning & Electrical.

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

GAC Services is #1, with a CR Score of 63 out of 100 on emergency weights.

How are emergency HVAC contractors in Linganore 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?

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

Update log for Linganore

  1. October 2026: CR Scores recalculated for 311 hvac contractors serving Linganore.

More emergency and heating and cooling pages