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Furnace, AC & HVAC Repair in Fond du Lac, WI
Furnace repair, air conditioning, heat pumps and HVAC service in Fond du Lac and nearby towns. 19 businesses listed, 6 with confirmed emergency service. Last checked October 2026.
AT
HVAC · 251 Griffith St
Checked Score 80/100How it adds up
- Customer reviews40.4 / 454.79★ adjusted average from 617 reviews
- Review volume15 / 15617 reviews
- Years in business14.5 / 1529 years
- Emergency service10 / 10Confirmed by the business
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businessesSince 1997★ 4.8Google (617)
Emergency serviceMon–Fri 7:30am–4pm
Residential heating and cooling since 1997, with 24-hour emergency service.
Does: furnace installation, furnace repair, air conditioner install & repair, boiler maintenance, mini-split repair
SI
HVAC · Based in Horicon
Checked Score 83/100How it adds up
- Customer reviews42.6 / 454.89★ adjusted average from 543 reviews
- Review volume15 / 15543 reviews
- Years in business15 / 1579 years
- Emergency service10 / 10Confirmed by the business
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businessesSince 1947★ 4.9Google (543)
Emergency serviceMon–Fri 7am–4:30pm
Horicon heating and cooling company since 1947 with a Fond du Lac shop since 1992; furnace repair available 24/7.
Does: furnace repair & installation, air conditioner repair & installation, HVAC tune-ups, energy efficiency upgrades, indoor air quality
ZH
HVAC · 136 S Brooke St
Checked Score 59/100How it adds up
- Customer reviews24.5 / 454.09★ adjusted average from 33 reviews
- Review volume9.2 / 1533 reviews
- Years in business15 / 1536 years
- Emergency service10 / 10Confirmed by the business
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businessesSince 1990★ 4.1Google (33)
Emergency service
Serving Fond du Lac homes and businesses since 1990, with emergency service.
Does: furnace installation, furnace repair, air conditioner install & repair, HVAC maintenance
WH
HVAC · 160 S Brooke St
Checked Score 48/100How it adds up
- Customer reviews22.5 / 454.00★ adjusted average from 25 reviews
- Review volume8.5 / 1525 reviews
- Years in business15 / 1575 years
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials2 / 5Focus on Energy Trade Ally
How we rate businessesSince 1951★ 4.0Google (25)
✓ Focus on Energy Trade AllyMon–Fri 8am–4:30pm
Heating and cooling company founded in 1951, with offices in Green Bay, Oshkosh and Fond du Lac.
Does: furnace repair, heat pump repair, air conditioner repair, HVAC installation
MH
HVAC · Based in Omro
Checked Score 83/100How it adds up
- Customer reviews42.6 / 454.89★ adjusted average from 566 reviews
- Review volume15 / 15566 reviews
- Years in business15 / 1550 years
- Emergency service10 / 10Confirmed by the business
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businessesSince 1976★ 4.9Google (566)
Emergency service
Family-owned Omro heating and cooling company since 1976, with 24-hour emergency service.
Does: furnace install & repair, air conditioner install & repair, indoor air quality, HVAC maintenance
Still confirming: whether they serve Fond du Lac
MO
HVAC · 311 W Rolling Meadows Dr
Checked Score 22/100How it adds up
- Customer reviews1.6 / 453.07★ adjusted average from 6 reviews
- Review volume5.1 / 156 reviews
- Years in business15 / 1585 years
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businessesSince 1941★ 2.3Yelp (6)
Mon–Fri 8am–5pm
Locally owned since 1941. Fuel and propane delivery plus furnace and AC repair and installs.
Does: furnace repair & installation, air conditioner repair & installation, HVAC tune-ups, hydronic heating, heating oil delivery
KZ
HVAC + Plumbing · Based in Oshkosh
Checked Score 61/100How it adds up
- Customer reviews36.1 / 454.60★ adjusted average from 38 reviews
- Review volume9.5 / 1538 reviews
- Years in business15 / 15100+ years
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses100+ yearsin business★ 5.0Google (35)★ 1.0Yelp (3)
Mon–Fri 7am–4:30pm
Oshkosh plumbing and heating contractor for more than 100 years, serving the Fox Valley and part of Fond du Lac County.
Does: furnace install & repair, air conditioner install & repair, boilers, heat pumps, ductless systems
FH
HVAC · N7374 Mosher Dr
Checked Score 45/100How it adds up
- Customer reviews30.9 / 454.38★ adjusted average from 3 reviews
- Review volume3.6 / 153 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service10 / 10Confirmed by the business
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses★ 5.0Google (3)
Emergency serviceMon–Fri 7:30am–4pm
Repairs all brands and installs everything from furnaces to geothermal systems.
Does: furnace repair & replacement, air conditioner repair & replacement, heat pumps, ductless mini-splits, geothermal
HR
HVAC · N6444 Fenner Rd
Checked Score 52/100How it adds up
- Customer reviews35.2 / 454.56★ adjusted average from 12 reviews
- Review volume6.7 / 1512 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service0 / 10Not confirmed
- BBB rating10 / 10BBB A+
- Credentials0 / 5None on file
How we rate businesses★ 4.8Google (12)A+BBB
Mon–Fri 7am–4pm
Heating, cooling and refrigeration service across Fond du Lac County.
Does: heating service, air conditioning service, refrigeration service
WN
HVAC · 228 S Military Rd Ste 200
Checked Score 51/100How it adds up
- Customer reviews41.7 / 454.85★ adjusted average from 29 reviews
- Review volume8.9 / 1529 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses★ 5.0Google (29)
Mon–Fri 8am–5pm
Fond du Lac air duct and dryer vent cleaning, plus mold remediation.
Does: air duct cleaning, dryer vent cleaning, mold remediation, allergen & dust removal
SP
HVAC + Plumbing · 219 W 9th St
Checked Score 49/100How it adds up
- Customer reviews38.9 / 454.73★ adjusted average from 49 reviews
- Review volume10.2 / 1549 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses★ 4.8Google (48)★ 5.0Yelp (1)
Mon–Fri 8am–5pm
Owner-run plumbing and heating contractor on West 9th Street.
Does: plumbing repair, water heater repair, heating service
EC
HVAC + Plumbing · Based in North Fond du Lac
Checked Score 56/100How it adds up
- Customer reviews37.6 / 454.67★ adjusted average from 26 reviews
- Review volume8.6 / 1526 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service10 / 10Confirmed by the business
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses★ 4.8Google (26)
Emergency serviceMon–Fri 7:30am–4:30pm
North Fond du Lac heating, cooling and water heater company with service 24 hours a day, weekends and holidays included.
Does: furnace repair & replacement, air conditioner repair & replacement, boilers, heat pumps, water heater repair & replacement
NM
HVAC · N5461 Sheila St
Checked Score 10/100How it adds up
- Customer reviews0 / 45No Google or Yelp reviews on file
- Review volume0 / 150 reviews
- Years in business9.5 / 1519+ years
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses19 yearsin business
Fond du Lac County HVAC contractor, about 19 years in business.
Does: heating service, air conditioning service, commercial air conditioning
Still confirming: hours
FP
HVAC + Plumbing · 735 Sullivan Dr
Checked Score 45/100How it adds up
- Customer reviews38.4 / 454.71★ adjusted average from 12 reviews
- Review volume6.7 / 1512 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses★ 5.0Google (12)
Mon–Fri 8am–5pm
Plumbing and heating contractor in Fond du Lac, reportedly since 1991.
Does: plumbing service, heating service
Still confirming: founding year
BH
HVAC · Based in Ripon
Checked Score 60/100How it adds up
- Customer reviews44.9 / 455.00★ adjusted average from 1828 reviews
- Review volume15 / 151828 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses★ 5.0Google (1828)
Mon–Thu 7am–4:30pm; Fri 7am–3pm
Ripon heating and cooling contractor that serves Fond du Lac County and repairs most brands.
Does: furnace repair & installation, air conditioner repair & installation, HVAC replacement, HVAC maintenance
AM
HVAC + Plumbing · W4060 Aspen Ct
Not scored yetnot enough public infoHow it adds up
- Customer reviews0 / 45No Google or Yelp reviews on file
- Review volume0 / 150 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businessesMechanical contractor handling plumbing, drains, heating and cooling.
Does: plumbing, drain cleaning, heating, air conditioning, mechanical repair & installation
Still confirming: hours
AB
HVAC · Based in Oshkosh
Checked Score 49/100How it adds up
- Customer reviews37.3 / 454.66★ adjusted average from 81 reviews
- Review volume11.5 / 1581 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses★ 4.7Google (81)
Mon–Fri 8am–4:30pm
Above & Beyond Expectations Heating and Cooling, an Oshkosh HVAC company covering furnaces, boilers, heat pumps and AC.
Does: furnace sales, install & repair, boilers, heat pumps, air conditioner install & repair, indoor air quality
AH
HVAC · Based in Waupun
Checked Score 58/100How it adds up
- Customer reviews44.4 / 454.97★ adjusted average from 171 reviews
- Review volume13.4 / 15171 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses★ 5.0Google (171)
Mon–Fri 7:30am–4pm
Waupun residential heating and cooling contractor.
Does: furnace install & repair, air conditioner install & repair, heat pumps, ductless systems, dual-fuel systems
Still confirming: whether they serve Fond du Lac, 24/7 emergency claim (dealer page only)
SH
HVAC · Based in Campbellsport
Checked Score 40/100How it adds up
- Customer reviews33.6 / 454.49★ adjusted average from 12 reviews
- Review volume6.7 / 1512 reviews
- Years in business0 / 15Not confirmed yet
- Emergency service0 / 10Not confirmed
- BBB rating0 / 10No BBB rating on file
- Credentials0 / 5None on file
How we rate businesses★ 4.7Google (12)
Campbellsport air conditioning contractor.
Does: air conditioning
Still confirming: services offered, whether they serve Fond du Lac