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ContractorsRanked

Best HVAC Contractors in Sycamore, IL (2026)

289 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Sycamore: Service Now Home Services, CR Score 92/100; 4.9★ from 879 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Smith-Dahlquist, Inc., posts 24/7 hours; ranked #2 of 289.

  3. 6

    Most-reviewed: Lifeline Plumbing, Heating & Cooling, 3,222 Google reviews at 4.9★, the most of 289 ranked; ranked #6.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

289 Sycamore HVAC contractors are ranked here by CR Score, from 8 published factors. 143 are open 24/7, 204 open Saturdays and 168 open Sundays, based on posted hours. The median Google rating is 4.9★ across 289 rated businesses.

Top 10 HVAC contractors in Sycamore at a glance

Top 10 HVAC contractors in Sycamore at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Service Now Home Services924.9★ (879)DeKalb, 7 mi away24/7Overall
2Smith-Dahlquist, Inc.924.9★ (194)Sycamore24/7Emergencies
3Joiner's HVAC, Inc.915.0★ (129)DeKalb, 4 mi away24/7—
4Climate Control Services LLC905.0★ (776)Elgin, 17 mi away24/7—
5Kustom Heating and Cooling905.0★ (1,021)Elgin, 19 mi away24/7—
6Lifeline Plumbing, Heating & Cooling904.9★ (3,222)Elgin, 23 mi away24/7Most reviews
7McNally's Heating and Cooling904.9★ (2,593)Batavia, 22 mi away24/7—
8Leith Heating and Cooling Inc.905.0★ (784)Elgin, 18 mi away24/7—
9G & R Heating and Air904.8★ (2,067)Gilberts, 18 mi away24/7—
10Hero Heating & Air Conditioning904.8★ (209)DeKalb, 5 mi away24/7—

The 289 best HVAC contractors in Sycamore, ranked

Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.

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

  13. #13 THE FURNACE GUY

    Based in Sycamore

    89/100CR Score

    Ranked #13 because of its Google rating and availability: 5.0★ from 38 Google reviews, open 24/7.

    • 5.0★ from 38 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    315 N California St, Sycamore, IL 60178
    View profile for THE FURNACE GUY(779) 777-5557

HVAC contractors ranked #26 to #50

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 289 ranked HVAC contractors here; the rest are on their profiles.

HVAC contractors in Sycamore, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Hurst Heating & Cooling874.8★ (463)18 mi
27JNL Climate Control, Inc.874.9★ (820)25 mi
28GSHA Services, LTD874.9★ (747)25 mi
29Andersen Plumbing, Heating and AC Repair875.0★ (434)25 mi
30Assured Appliance & Heating & Air874.8★ (62)8 mi
31Dennis Heating and Cooling875.0★ (20)4 mi
32All-Star Heating & Air Conditioning Inc.874.5★ (138)5 mi
33Charles McDuffee Co. Heating & Air Conditioning874.9★ (422)22 mi
34Buchner Heating, Air & Plumbing874.9★ (440)23 mi
35Doc's HVAC874.9★ (278)20 mi
36Legacy Home Services874.9★ (571)25 mi
37Rest Assured HVAC875.0★ (72)14 mi
38Compass Heating and Air Conditioning Inc.864.9★ (412)24 mi
39Youngren's, Inc. Heating & Cooling864.9★ (408)24 mi
40Amy Home Services864.8★ (483)22 mi
41Custom Service Heating & Cooling Inc.865.0★ (198)23 mi
42Comfort Care Heating & Air Conditioning865.0★ (167)22 mi
43Franzen Heating & Cooling864.9★ (396)25 mi
44McNally's Heating & Cooling of Bartlett865.0★ (235)25 mi
45Shadow Heating and Cooling865.0★ (229)11 mi
46American Mechanical Heating & Cooling864.9★ (60)14 mi
47One Call Heating & Cooling865.0★ (138)22 mi
48Patriot Heating and Cooling Services Inc.864.7★ (476)20 mi
49JV heating & cooling LLC864.8★ (69)13 mi
50Hull HVAC864.9★ (154)20 mi

Also serving Sycamore

20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.

Unranked HVAC contractors serving Sycamore
BusinessGoogle ratingDistance
All In 01 Services5.0★ (2)21 mi
AM to PM Heating & Cooling5.0★ (2)19 mi
BP HEATING LLC5.0★ (2)15 mi
Conservative Heating & Air Conditioning3.0★ (2)21 mi
Countryview heating and cooling5.0★ (2)21 mi
D & D Comfort Inc. Heating & Air Conditioning, Inc.4.9★ (110)18 mi
Dow HVAC Inc.In Sycamore
Heating & Air Conditioning3.0★ (2)21 mi
HVAC Options Inc5.0★ (2)19 mi
Kendall Heating & Air ConditioningIn Sycamore
LE Heating And Cooling5.0★ (2)17 mi
Newton's HVAC5.0★ (2)In Sycamore
Nick's Action Air5.0★ (2)21 mi
Northway Heating, Cooling & Sheet Metal, Inc.5.0★ (2)11 mi
One Call Heating & Cooling5.0★ (2)11 mi
Ron's Heating & Air Conditioning - 24 h/r emergency service4.6★ (47)In Sycamore
Service Concepts Inc - Commercial Heating and Cooling - Genoa, IL3.0★ (2)7 mi
SERVPRO of DeKalb County4.5★ (30)In Sycamore
TNC Heating and CoolingIn Sycamore
ZN Heating and Cooling, Inc5.0★ (2)13 mi

How much do HVAC contractors cost in Sycamore?

National price ranges in USD, not adjusted for Sycamore. Each row names its basis and the month we checked it.

How much do HVAC contractors cost in Sycamore?
JobLowTypicalHighBasisChecked
AC replacement$3,887$5,978$8,073Per system, installed (unit plus labor); typical range of customer-reported jobs. US national rangeOctober 2026
Furnace replacement$2,823$4,814$6,896Per system, installed; typical range of customer-reported jobs. US national rangeOctober 2026

When to hire an HVAC contractor in Illinois

In Illinois, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.

How we ranked Sycamore HVAC contractors

We scored 289 Sycamore HVAC contractors on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.

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 fromIn Sycamore data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

HVAC contractors in Sycamore: frequently asked questions

Who is the best HVAC contractor in Sycamore?

By CR Score, the highest-ranked HVAC contractor in Sycamore, IL is Service Now Home Services with a CR Score of 92/100. It has 4.9★ from 879 Google reviews. It is open 24/7. Smith-Dahlquist, Inc. (#2) and Joiner's HVAC, Inc. (#3) follow. We ranked 289 HVAC contractors on 8 factors, last updated October 22, 2026.

How many HVAC contractors are there in Sycamore?

ContractorsRanked ranks 289 HVAC contractors serving Sycamore, IL. 4 of them are based in Sycamore; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which HVAC contractors in Sycamore are open 24/7?

143 ranked HVAC contractors in Sycamore post 24/7 hours. The highest-ranked are Service Now Home Services (#1), Smith-Dahlquist, Inc. (#2) and Joiner's HVAC, Inc. (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in Sycamore work on weekends?

204 of 289 ranked HVAC contractors post Saturday hours and 168 post Sunday hours. The highest-ranked open Saturdays are Service Now Home Services (#1), Smith-Dahlquist, Inc. (#2) and Joiner's HVAC, Inc. (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does ac replacement cost in Sycamore?

AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Sycamore. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Sycamore HVAC contractors have?

The median Google rating among 289 rated HVAC contractors in Sycamore is 4.9★, with a median of 30 reviews. Lifeline Plumbing, Heating & Cooling has the most, 3,222 reviews, and ranks #6. We adjust ratings for review count, so a few five-star reviews cannot top the list.

When is the best time to hire an HVAC contractor in Sycamore?

In Illinois, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.

How does ContractorsRanked rank HVAC contractors?

Each HVAC contractor gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.

Update log for Sycamore

  1. October 2026: CR Scores recalculated for 289 hvac contractors serving Sycamore.
  2. October 2026: 2 duplicate listings merged.

More HVAC contractors and Sycamore pages

Other trades in Sycamore