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Emergency HVAC Contractors in Walkersville, MD (2026)

Top 50 of 231 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 Walkersville: Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical, 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 Walkersville at a glance

Top emergency HVAC contractors in Walkersville at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical644.8★ (932)Frederick, 7 mi away24/7
2Wenbrooke Services - Electrical, Plumbing, Heating and Air644.8★ (1,208)Frederick, 9 mi away24/7
3closed644.8★ (240)Walkersville24/7
4Warner Service634.8★ (537)Frederick, 5 mi away24/7
5Frederick Air Inc634.8★ (414)Frederick, 6 mi away24/7
6United Air Temp634.7★ (928)Frederick, 10 mi away24/7
7Markool Heating Cooling Plumbing634.9★ (547)Frederick, 10 mi away24/7
8Airtron Heating & Air Conditioning624.5★ (724)Frederick, 9 mi away24/7
9Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical624.8★ (4,764)Hagerstown, 24 mi away24/7
10Urbana HVAC625.0★ (182)Ballenger Creek, 7 mi away24/7

Call an emergency HVAC contractor in Walkersville 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 Walkersville, 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 231 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.

  3. #3 closed

    Based in Walkersville

    64/100CR Score

    Ranked #3 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

  4. #4 Warner Service

    Based in Frederick, 5 mi away

    63/100CR Score

    Ranked #4 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

  5. #5 Frederick Air Inc

    Based in Frederick, 6 mi away

    63/100CR Score

    Ranked #5 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

  6. #6 United Air Temp

    Based in Frederick, 10 mi away

    63/100CR Score

    Ranked #6 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

  10. #10 Urbana HVAC

    Based in Ballenger Creek, 7 mi away

    62/100CR Score

    Ranked #10 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

  13. #13 Presidential, Inc.

    Based in Gaithersburg, 24 mi away

    61/100CR Score

    Ranked #13 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

Top 50 of 231 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 Walkersville, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Michael & Son Services584.0★ (88)7 mi
27Prestige Home Services585.0★ (61)16 mi
28Prime AC Repair Frederick585.0★ (15)7 mi
29McIntire HVAC584.9★ (160)22 mi
30Right A Way Heating & Cooling585.0★ (3)In Walkersville
31ClemAIR Heating & Cooling, LLC585.0★ (9)6 mi
32Fire n Ice Hvac, Inc585.0★ (90)21 mi
33Clarksburg Heating574.9★ (60)19 mi
34Akron Industrial Heating & Cooling574.5★ (8)6 mi
35Right-A-Way Heating & Cooling575.0★ (17)12 mi
36Forever Air Duct Cleaning575.0★ (6)6 mi
37Precision Heating & Cooling, Inc.572.8★ (12)3 mi
38P&Y Heating and Cooling575.0★ (85)24 mi
39Griffith Energy Services, Inc.574.4★ (147)21 mi
40M&M Welding and Fabricators, Inc.564.7★ (12)14 mi
41Mario Bro, LLC565.0★ (53)24 mi
42Skyline Heating and Air565.0★ (30)21 mi
43Heating & Air Solutions565.0★ (9)15 mi
44United Air Temp564.7★ (75)25 mi
45Siegman Forced Air Systems, Inc.554.7★ (30)21 mi
46Long Mechanical Services LLC555.0★ (19)21 mi
47Apple Plumbing, Heating, & Air555.0★ (216)22 mi
48JLB Mechanical Heating & Cooling, Inc.545.0★ (16)22 mi
49Precision Westminster HVAC Repair545.0★ (10)21 mi
50BST Plumbing & Heating544.8★ (8)5 mi

How we ranked emergency HVAC contractors in Walkersville

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 Walkersville: questions

Which HVAC contractors in Walkersville are open 24/7?

25 on this list post 24/7 hours, including Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical, Wenbrooke Services - Electrical, Plumbing, Heating and Air, closed, Warner Service and Frederick Air Inc.

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

Larry & Sons Plumbing, Heating, Cooling, Drain & Electrical is #1, with a CR Score of 64 out of 100 on emergency weights.

How are emergency HVAC contractors in Walkersville 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 Walkersville

  1. October 2026: CR Scores recalculated for 231 hvac contractors serving Walkersville.

More emergency and heating and cooling pages