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Emergency HVAC Contractors in Ilchester, MD (2026)

Top 50 of 833 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 Ilchester: Horizon Services - Air Conditioning, Heating, Plumbing, & 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 Ilchester at a glance

Top emergency HVAC contractors in Ilchester at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical934.8★ (4,514)Baltimore, 5 mi away24/7
2Beltway Air Conditioning, Heating & Plumbing924.9★ (2,167)Hanover, 8 mi away24/7
3Michael & Son Services914.7★ (8,039)Baltimore, 13 mi away24/7
4Complete Climate Services LLC915.0★ (786)Baltimore, 10 mi away24/7
5Environmental Systems Associates904.9★ (658)Columbia, 7 mi away24/7
6Len The Plumber Heating & Air, LLC904.7★ (15,911)Arbutus, 5 mi away24/7
7Boothe's Heating, Air, Plumbing, Drains & Electrical904.9★ (1,461)Dundalk, 13 mi away24/7
8Sila Heating, Air Conditioning & Plumbing904.9★ (275)Arbutus, 4 mi away24/7
9Alpha Heating & Air Conditioning, LLC904.9★ (419)Arbutus, 7 mi away24/7
10Greenfox Cooling, Heating & Plumbing894.8★ (238)Columbia, 3 mi away24/7

Call an emergency HVAC contractor in Ilchester 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 Ilchester, 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 833 is on the HVAC contractors page.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  11. #11 GAC Services

    Based in Gaithersburg, 24 mi away

    89/100CR Score

    Ranked #11 because of its Google rating and availability: 4.9★ from 6,908 Google reviews, open 24/7.

    • 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

  14. #14 Farnen & Dermer

    Based in Owings Mills, 12 mi away

    89/100CR Score

    Ranked #14 because of its Google rating and availability: 4.8★ from 931 Google reviews, open 24/7.

    • 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

  15. #15 Tario HVAC, LLC

    Based in Arbutus, 4 mi away

    89/100CR Score

    Ranked #15 because of its Google rating and availability: 4.9★ from 142 Google reviews, open 24/7.

    • 4.9★ from 142 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1319 Maple Ave, Halethorpe, MD 21227
    View profile for Tario HVAC, LLC(410) 314-1161

  18. #18 Ambient LLC

    Based in Severn, 9 mi away

    88/100CR Score

    Ranked #18 because of its Google rating and availability: 4.8★ from 336 Google reviews, open 24/7.

    • 4.8★ from 336 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    508 Shaw Ct #103, Severn, MD 21144
    View profile for Ambient LLC(410) 429-7280

Top 50 of 833 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 Ilchester, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Triple E884.9★ (469)14 mi
27Beyond Cooling LLC884.9★ (82)5 mi
28Carver Heating & Cooling885.0★ (46)2 mi
29THE ELECTRICIANS884.9★ (98)6 mi
30United Air Temp884.8★ (171)7 mi
31Presidential, Inc.884.9★ (1,701)22 mi
32Beltway Air Conditioning, Heating & Plumbing884.9★ (90)5 mi
33United Air Temp884.8★ (1,306)19 mi
34Elmar Heating & Cooling874.8★ (614)16 mi
35Beltway Air Conditioning, Heating and Plumbing875.0★ (129)11 mi
36Breezy Heating Ventilation and Air Conditioning874.8★ (121)7 mi
37Michael Bonsby HVAC, Plumbing & Electrical874.8★ (2,083)22 mi
38USA HVAC Services875.0★ (179)13 mi
39At Your Service Heating and Cooling LLC874.6★ (811)13 mi
40F.H. Furr Plumbing, Heating, Air Conditioning & Electrical874.7★ (1,847)20 mi
41Maryland Heating & Air874.9★ (369)16 mi
42Parker Pearce Service Experts874.8★ (1,700)22 mi
43United Air Temp874.9★ (180)12 mi
44ROCKY LLC874.6★ (253)8 mi
45Wenbrooke Services - Electrical, Plumbing, Heating, and Air875.0★ (49)6 mi
46Barstow & Sons Heating and Cooling874.9★ (1,127)23 mi
47F.H. Furr Plumbing, Heating, Air Conditioning & Electrical874.8★ (1,788)8 mi
48Contemporary Air Systems, Inc.875.0★ (195)16 mi
49Dalton Air Conditioning Repair875.0★ (44)7 mi
50Hughes Mechanical, LLC874.8★ (408)17 mi

How we ranked emergency HVAC contractors in Ilchester

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. 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
Reputation25%Bayesian-adjusted Google star rating
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2
Review volume10%log10(reviews + 1) against the list maximum
Recency10%Share of reviews from the last 12 months
Availability20%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radius
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)

Emergency HVAC contractors in Ilchester: questions

Which HVAC contractors in Ilchester are open 24/7?

25 on this list post 24/7 hours, including Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical, Beltway Air Conditioning, Heating & Plumbing, Michael & Son Services, Complete Climate Services LLC and Environmental Systems Associates.

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

Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical is #1, with a CR Score of 93 out of 100 on emergency weights.

How are emergency HVAC contractors in Ilchester ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 25% and 20%. 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 Ilchester

  1. October 2026: CR Scores recalculated for 833 hvac contractors serving Ilchester.
  2. October 2026: 3 duplicate listings merged.

More emergency and heating and cooling pages