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Emergency HVAC Contractors in Aylmer, ON (2026)

Top 26 of 139 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 Aylmer: Reliance London Heating, Air Conditioning & Plumbing, 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 Aylmer at a glance

Top emergency HVAC contractors in Aylmer at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Reliance London Heating, Air Conditioning & Plumbing914.8★ (12,217)London, 33 km away24/7
2Abode Home Comfort905.0★ (499)St. Thomas, 14 km away24/7
3Gastech Solutions Inc.904.9★ (491)St. Thomas, 14 km away24/7
4Handy Bros. HVAC St. Thomas (AC and Furnace Repair)894.9★ (313)St. Thomas, 17 km away24/7
5AirWise Heating & Cooling885.0★ (29)Aylmer24/7
6Handy Bros. HVAC London (AC and Furnace Repair)884.9★ (536)London, 26 km away24/7
7Roy Inch & Sons Home Services by Enercare884.7★ (1,490)London, 28 km away24/7
8M & K Heating and Air Conditioning874.6★ (1,614)London, 30 km away24/7
9B.R.'s Plumbing and Heating874.8★ (236)Norfolk County, 23 km away24/7
10KALJIC Mechanical865.0★ (55)St. Thomas, 17 km away24/7

Call an emergency HVAC contractor in Aylmer 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 Aylmer, 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 139 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.

  22. #22 Aire One

    Based in London, 28 km away

    83/100CR Score

    Ranked #22 because of its Google rating and availability: 4.4★ from 177 Google reviews, open 24/7.

    • 4.4★ from 177 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    878 Wellington Rd, London, ON N6E 1L9
    View profile for Aire One(519) 668-3000

Top 26 of 139 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 Aylmer, ranks 26 to 26
RankBusinessCR ScoreGoogle ratingDistance
26London Nitro Heating and Cooling835.0★ (28)30 km

How we ranked emergency HVAC contractors in Aylmer

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 Aylmer: questions

Which HVAC contractors in Aylmer are open 24/7?

25 on this list post 24/7 hours, including Reliance London Heating, Air Conditioning & Plumbing, Abode Home Comfort, Gastech Solutions Inc., Handy Bros. HVAC St. Thomas (AC and Furnace Repair) and AirWise Heating & Cooling.

Who is ranked #1 for emergency heating and cooling in Aylmer, ON?

Reliance London Heating, Air Conditioning & Plumbing is #1, with a CR Score of 91 out of 100 on emergency weights.

How are emergency HVAC contractors in Aylmer 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?

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

Update log for Aylmer

  1. October 2026: CR Scores recalculated for 139 hvac contractors serving Aylmer.

More emergency and heating and cooling pages