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Emergency HVAC Contractors in New Castle, DE (2026)

Top 26 of 340 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 26 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 New Castle: 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 New Castle at a glance

Top emergency HVAC contractors in New Castle at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical674.8★ (9,075)Wilmington, 6 mi away24/7
2F.H. Furr Plumbing, Heating, Air Conditioning & Electrical664.8★ (2,115)New Castle24/7
3Harris Plumbing, Heating, Air & Electrical664.8★ (1,753)New Castle24/7
4One Hour Heating & Air Conditioning® of Wilmington De664.9★ (3,009)Wilmington, 4 mi away24/7
5LIAM Services665.0★ (979)New Castle24/7
6Burns & McBride Home Comfort664.8★ (1,529)New Castle24/7
7Done Right Today665.0★ (2,228)Wilmington, 5 mi away24/7
8Maichle's Heating and Air Conditioning654.9★ (642)New Castle24/7
9Sobieski Inc.654.7★ (5,666)Newark, 9 mi away24/7
10Aire Serv of Newark DE644.9★ (2,972)Newark, 11 mi away24/7

Call an emergency HVAC contractor in New Castle 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 26 emergency HVAC contractors in New Castle, 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 340 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.

  5. #5 LIAM Services

    Based in New Castle

    66/100CR Score

    Ranked #5 because of its Google rating and trade focus: 5.0★ from 979 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 979 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    292 Churchmans Rd, New Castle, DE 19720
    View profile for LIAM Services(302) 202-9742

  7. #7 Done Right Today

    Based in Wilmington, 5 mi away

    66/100CR Score

    Ranked #7 because of its Google rating and trade focus: 5.0★ from 2,228 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 2,228 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    19 Germay Dr, Wilmington, DE 19804
    View profile for Done Right Today(302) 433-6273

  9. #9 Sobieski Inc.

    Based in Newark, 9 mi away

    65/100CR Score

    Ranked #9 because of its Google rating and trade focus: 4.7★ from 5,666 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 5,666 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1325 Old Cooch's Bridge, Newark, DE 19713
    View profile for Sobieski Inc.(877) 707-1358

  12. #12 Boulden Brothers

    Based in Newark, 11 mi away

    63/100CR Score

    Ranked #12 because of its Google rating and trade focus: 4.8★ from 2,510 Google reviews, listed on Google as “Air conditioning repair service”.

    • 4.8★ from 2,510 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    107 Sandy Dr Building 700, Newark, DE 19713
    View profile for Boulden Brothers(302) 246-7878

  16. #16 Triton Services

    Based in Glasgow, 7 mi away

    63/100CR Score

    Ranked #16 because of its Google rating and trade focus: 5.0★ from 466 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 466 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    600 Madison St, Delaware City, DE 19706
    View profile for Triton Services(302) 985-7656

  25. #25 Signature HVAC

    Based in West Chester, 23 mi away

    61/100CR Score

    Ranked #25 because of its Google rating and trade focus: 4.9★ from 3,053 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 3,053 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1330 Enterprise Dr, West Chester, PA 19380
    View profile for Signature HVAC(484) 473-6107

Top 26 of 340 HVAC contractors by emergency score

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

HVAC contractors in New Castle, ranks 26 to 26
RankBusinessCR ScoreGoogle ratingDistance
26Mattioni Plumbing, Heating & Cooling615.0★ (477)15 mi

How we ranked emergency HVAC contractors in New Castle

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 New Castle: questions

Which HVAC contractors in New Castle are open 24/7?

25 on this list post 24/7 hours, including Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical, F.H. Furr Plumbing, Heating, Air Conditioning & Electrical, Harris Plumbing, Heating, Air & Electrical, One Hour Heating & Air Conditioning® of Wilmington De and LIAM Services.

Who is ranked #1 for emergency heating and cooling in New Castle, DE?

Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical is #1, with a CR Score of 67 out of 100 on emergency weights.

How are emergency HVAC contractors in New Castle 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 New Castle

  1. October 2026: CR Scores recalculated for 340 hvac contractors serving New Castle.
  2. October 2026: 4 duplicate listings merged.

More emergency and heating and cooling pages