HVAC, Electrical & Generator Services in Illinois and Wisconsin

Looking for reliable HVAC, electrical, and generator services in your area? GSHA Services proudly serves a wide range of Illinois and Wisconsin communities by ZIP code and city. Explore our comprehensive coverage below to find your city and ZIP code.

Explore Our Services

Visit our HVAC Installation or Electrical Services pages for more details on our offerings, or contact us today to schedule service.

Lennox installation by county: as a Lennox Premier Dealer, GSHA installs and services Lennox furnaces, air conditioners, heat pumps and mini-splits in McHenry County, Lake County, Kane County, DuPage County, Cook County and Will County. Each county page lists the communities we serve there, local permit rules and utility rebate programs.

KOHLER generators by county: see our KOHLER generator page and the KOHLER service area.

The lists below cover 456 ZIP codes and match the service area set in our online booking system. If your ZIP code is listed you can book online; if it is not, call us and we will confirm whether we can reach you.

Illinois ZIP Codes & Cities

  • 60002 – Antioch
  • 60004 – Arlington Heights
  • 60005 – Arlington Heights
  • 60006 – Arlington Heights
  • 60007 – Elk Grove Village
  • 60008 – Rolling Meadows
  • 60009 – Arlington Heights
  • 60010 – Barrington
  • 60011 – Barrington
  • 60012 – Crystal Lake
  • 60013 – Cary
  • 60014 – Crystal Lake
  • 60015 – Deerfield
  • 60016 – Des Plaines
  • 60017 – Des Plaines
  • 60018 – Des Plaines
  • 60019 – Des Plaines
  • 60020 – Fox Lake
  • 60021 – Fox River Grove
  • 60022 – Glencoe
  • 60025 – Glenview
  • 60026 – Glenview
  • 60029 – Golf
  • 60030 – Grayslake
  • 60031 – Gurnee
  • 60033 – Harvard
  • 60034 – Hebron
  • 60035 – Highland Park
  • 60038 – Palatine
  • 60040 – Highwood
  • 60041 – Ingleside
  • 60042 – Island Lake
  • 60043 – Kenilworth
  • 60044 – Lake Bluff
  • 60045 – Lake Forest
  • 60046 – Lake Villa
  • 60047 – Lake Zurich
  • 60048 – Libertyville
  • 60050 – McHenry
  • 60051 – McHenry
  • 60053 – Morton Grove
  • 60055 – Palatine
  • 60056 – Mount Prospect
  • 60060 – Mundelein
  • 60061 – Vernon Hills
  • 60062 – Northbrook
  • 60064 – North Chicago
  • 60065 – Northbrook
  • 60067 – Palatine
  • 60068 – Park Ridge
  • 60069 – Lincolnshire
  • 60070 – Prospect Heights
  • 60071 – Richmond
  • 60072 – Ringwood
  • 60073 – Round Lake
  • 60074 – Palatine
  • 60076 – Skokie
  • 60077 – Skokie
  • 60078 – Palatine
  • 60081 – Spring Grove
  • 60083 – Wadsworth
  • 60084 – Wauconda
  • 60085 – Waukegan
  • 60087 – Waukegan
  • 60088 – Great Lakes
  • 60089 – Buffalo Grove
  • 60090 – Wheeling
  • 60091 – Wilmette
  • 60093 – Winnetka
  • 60094 – Palatine
  • 60095 – Palatine
  • 60096 – Zion
  • 60097 – Wonder Lake
  • 60098 – Woodstock
  • 60099 – Zion
  • 60101 – Addison
  • 60102 – Algonquin
  • 60103 – Bartlett
  • 60104 – Bellwood
  • 60105 – Bensenville
  • 60106 – Bensenville
  • 60107 – Streamwood
  • 60108 – Bloomingdale
  • 60110 – Carpentersville
  • 60111 – Clare
  • 60112 – Cortland
  • 60115 – DeKalb
  • 60116 – Carol Stream
  • 60117 – Bloomingdale
  • 60118 – Dundee
  • 60119 – Elburn
  • 60120 – Elgin
  • 60122 – Elgin
  • 60123 – Elgin
  • 60124 – Elgin
  • 60125 – Carol Stream
  • 60126 – Elmhurst
  • 60128 – Carol Stream
  • 60129 – Esmond
  • 60130 – Forest Park
  • 60131 – Franklin Park
  • 60132 – Carol Stream
  • 60133 – Hanover Park
  • 60134 – Geneva
  • 60135 – Genoa
  • 60136 – Gilberts
  • 60137 – Glen Ellyn
  • 60138 – Glen Ellyn
  • 60139 – Glendale Heights
  • 60140 – Hampshire
  • 60141 – Hines
  • 60142 – Huntley
  • 60143 – Itasca
  • 60145 – Kingston
  • 60146 – Kirkland
  • 60147 – La Fox
  • 60148 – Lombard
  • 60150 – Malta
  • 60151 – Maple Park
  • 60152 – Marengo
  • 60153 – Maywood
  • 60154 – Westchester
  • 60155 – Broadview
  • 60156 – Lake in the Hills
  • 60157 – Medinah
  • 60159 – Schaumburg
  • 60160 – Melrose Park
  • 60161 – Melrose Park
  • 60162 – Hillside
  • 60163 – Berkeley
  • 60164 – Franklin Park
  • 60165 – Stone Park
  • 60168 – Schaumburg
  • 60169 – Hoffman Estates
  • 60171 – River Grove
  • 60172 – Roselle
  • 60173 – Schaumburg
  • 60174 – St. Charles
  • 60175 – St. Charles
  • 60176 – Schiller Park
  • 60177 – South Elgin
  • 60178 – Sycamore
  • 60179 – Hoffman Estates
  • 60180 – Union
  • 60181 – Villa Park
  • 60184 – Wasco
  • 60185 – West Chicago
  • 60186 – West Chicago
  • 60187 – Wheaton
  • 60188 – Carol Stream
  • 60189 – Wheaton
  • 60190 – Winfield
  • 60191 – Wood Dale
  • 60192 – Hoffman Estates
  • 60193 – Schaumburg
  • 60194 – Schaumburg
  • 60195 – Schaumburg
  • 60196 – Schaumburg
  • 60197 – Carol Stream
  • 60199 – Carol Stream
  • 60201 – Evanston
  • 60202 – Evanston
  • 60203 – Evanston
  • 60204 – Evanston
  • 60208 – Evanston
  • 60209 – Evanston
  • 60290 – Chicago
  • 60301 – Oak Park
  • 60302 – Oak Park
  • 60303 – Oak Park
  • 60304 – Oak Park
  • 60305 – River Forest
  • 60398 – Franklin Park
  • 60399 – Wood Dale
  • 60403 – Crest Hill
  • 60404 – Shorewood
  • 60410 – Channahon
  • 60421 – Elwood
  • 60423 – Frankfort
  • 60431 – Joliet
  • 60432 – Joliet
  • 60433 – Joliet
  • 60435 – Joliet
  • 60436 – Joliet
  • 60439 – Lemont
  • 60440 – Bolingbrook
  • 60441 – Lockport
  • 60442 – Manhattan
  • 60446 – Romeoville
  • 60447 – Minooka
  • 60448 – Mokena
  • 60450 – Morris
  • 60451 – New Lenox
  • 60452 – Oak Forest
  • 60453 – Oak Lawn
  • 60454 – Oak Lawn
  • 60455 – Bridgeview
  • 60456 – Hometown
  • 60457 – Hickory Hills
  • 60458 – Justice
  • 60459 – Burbank
  • 60462 – Orland Park
  • 60463 – Palos Heights
  • 60464 – Palos Park
  • 60465 – Palos Hills
  • 60467 – Orland Park
  • 60477 – Tinley Park
  • 60480 – Willow Springs
  • 60481 – Wilmington
  • 60487 – Tinley Park
  • 60490 – Bolingbrook
  • 60491 – Homer Glen
  • 60499 – Bedford Park
  • 60501 – Summit
  • 60502 – Aurora
  • 60503 – Aurora
  • 60504 – Aurora
  • 60505 – Aurora
  • 60506 – Aurora
  • 60510 – Batavia
  • 60511 – Big Rock
  • 60512 – Bristol
  • 60513 – Brookfield
  • 60514 – Clarendon Hills
  • 60515 – Downers Grove
  • 60516 – Downers Grove
  • 60517 – Woodridge
  • 60519 – Eola
  • 60520 – Hinckley
  • 60521 – Hinsdale
  • 60522 – Hinsdale
  • 60523 – Oak Brook
  • 60525 – La Grange
  • 60526 – La Grange Park
  • 60527 – Willowbrook
  • 60532 – Lisle
  • 60534 – Lyons
  • 60536 – Millbrook
  • 60537 – Millington
  • 60538 – Montgomery
  • 60539 – Mooseheart
  • 60540 – Naperville
  • 60541 – Newark
  • 60542 – North Aurora
  • 60543 – Oswego
  • 60544 – Plainfield
  • 60545 – Plano
  • 60546 – Riverside
  • 60554 – Sugar Grove
  • 60555 – Warrenville
  • 60558 – Western Springs
  • 60559 – Westmont
  • 60560 – Yorkville
  • 60561 – Darien
  • 60563 – Naperville
  • 60564 – Naperville
  • 60565 – Naperville
  • 60566 – Naperville
  • 60567 – Naperville
  • 60569 – Aurora
  • 60570 – Hinsdale
  • 60572 – Aurora
  • 60585 – Plainfield
  • 60586 – Plainfield
  • 60597 – Fox Valley
  • 60598 – Aurora
  • 60599 – Fox Valley
  • 60610 – Chicago
  • 60612 – Chicago
  • 60613 – Chicago
  • 60614 – Chicago
  • 60618 – Chicago
  • 60622 – Chicago
  • 60625 – Chicago
  • 60626 – Chicago
  • 60630 – Chicago
  • 60631 – Chicago
  • 60634 – Chicago
  • 60639 – Chicago
  • 60640 – Chicago
  • 60641 – Chicago
  • 60642 – Chicago
  • 60643 – Chicago
  • 60644 – Chicago
  • 60645 – Chicago
  • 60646 – Chicago
  • 60647 – Chicago
  • 60651 – Chicago
  • 60656 – Chicago
  • 60657 – Chicago
  • 60659 – Chicago
  • 60660 – Chicago
  • 60663 – Chicago
  • 60666 – Chicago (O’Hare)
  • 60677 – Chicago
  • 60678 – Chicago
  • 60681 – Chicago
  • 60682 – Chicago
  • 60706 – Harwood Heights
  • 60707 – Elmwood Park
  • 60712 – Lincolnwood
  • 60714 – Niles
  • 61008 – Belvidere
  • 61010 – Byron
  • 61011 – Caledonia
  • 61012 – Capron
  • 61015 – Chana
  • 61016 – Cherry Valley
  • 61019 – Davis
  • 61020 – Davis Junction
  • 61024 – Durand
  • 61038 – Garden Prairie
  • 61047 – Leaf River
  • 61049 – Lindenwood
  • 61052 – Monroe Center
  • 61061 – Oregon
  • 61063 – Pecatonica
  • 61065 – Poplar Grove
  • 61068 – Rochelle
  • 61072 – Rockton
  • 61073 – Roscoe
  • 61080 – South Beloit
  • 61084 – Stillman Valley
  • 61088 – Winnebago
  • 61101 – Rockford
  • 61102 – Rockford
  • 61103 – Rockford
  • 61104 – Rockford
  • 61107 – Rockford
  • 61108 – Rockford
  • 61109 – Rockford
  • 61111 – Loves Park
  • 61112 – Rockford
  • 61114 – Rockford
  • 61115 – Machesney Park

Wisconsin ZIP Codes & Cities

  • 53005 – Brookfield
  • 53007 – Butler
  • 53008 – Brookfield
  • 53018 – Delafield
  • 53029 – Hartland
  • 53036 – Ixonia
  • 53038 – Johnson Creek
  • 53045 – Brookfield
  • 53046 – Lannon
  • 53051 – Menomonee Falls
  • 53052 – Menomonee Falls
  • 53056 – Nashotah
  • 53058 – Oconomowoc
  • 53064 – Palmyra
  • 53066 – Oconomowoc
  • 53069 – Okauchee
  • 53072 – Pewaukee
  • 53089 – Sussex
  • 53094 – Watertown
  • 53101 – Bassett
  • 53102 – Benet Lake
  • 53103 – Big Bend
  • 53104 – Bristol
  • 53105 – Burlington
  • 53108 – Caledonia
  • 53109 – Caledonia
  • 53110 – Cudahy
  • 53114 – Darien
  • 53115 – Delavan
  • 53118 – Dousman
  • 53119 – Eagle
  • 53120 – East Troy
  • 53121 – Elkhorn
  • 53122 – Elm Grove
  • 53125 – Fontana
  • 53126 – Franksville
  • 53127 – Genesee Depot
  • 53128 – Genoa City
  • 53129 – Greendale
  • 53130 – Hales Corners
  • 53132 – Franklin
  • 53137 – Helenville
  • 53139 – Kansasville
  • 53140 – Kenosha
  • 53141 – Kenosha
  • 53142 – Kenosha
  • 53143 – Kenosha
  • 53144 – Kenosha
  • 53146 – New Berlin
  • 53147 – Lake Geneva
  • 53148 – Lauderdale
  • 53149 – Mukwonago
  • 53150 – Muskego
  • 53151 – New Berlin
  • 53152 – North Prairie
  • 53153 – North Lake
  • 53154 – Oak Creek
  • 53156 – Palmyra
  • 53157 – Pell Lake
  • 53158 – Pleasant Prairie
  • 53159 – Powers Lake
  • 53168 – Salem
  • 53170 – Silver Lake
  • 53171 – Somers
  • 53172 – South Milwaukee
  • 53176 – Trevor
  • 53177 – Sturtevant
  • 53178 – Sullivan
  • 53179 – Twin Lakes
  • 53181 – Union Grove
  • 53182 – Waterford
  • 53183 – Wales
  • 53184 – Walworth
  • 53185 – Wind Lake
  • 53186 – Waukesha
  • 53187 – Waukesha
  • 53188 – Waukesha
  • 53189 – Waukesha
  • 53190 – Whitewater
  • 53191 – Williams Bay
  • 53192 – Wilmot
  • 53194 – Woodworth
  • 53195 – Zenda
  • 53199 – Kenosha
  • 53207 – Milwaukee
  • 53209 – Milwaukee
  • 53214 – Milwaukee
  • 53217 – Milwaukee
  • 53218 – Milwaukee
  • 53219 – Milwaukee
  • 53220 – Milwaukee
  • 53221 – Milwaukee
  • 53222 – Milwaukee
  • 53223 – Milwaukee
  • 53224 – Milwaukee
  • 53225 – Milwaukee
  • 53226 – Milwaukee
  • 53227 – Milwaukee
  • 53228 – Milwaukee
  • 53235 – Milwaukee
  • 53402 – Racine
  • 53403 – Racine
  • 53404 – Racine
  • 53405 – Racine
  • 53406 – Racine
  • 53505 – Avalon
  • 53511 – Beloit
  • 53520 – Brodhead
  • 53523 – Cambridge
  • 53525 – Clinton
  • 53534 – Clinton
  • 53536 – Darien
  • 53538 – Fort Atkinson
  • 53545 – Janesville
  • 53546 – Janesville
  • 53548 – Janesville
  • 53549 – Jefferson
  • 53551 – Lake Mills
  • 53563 – Milton
  • 53576 – Orfordville
  • 53585 – Sharon

Authorized brand dealer pages by county

Find GSHA’s dealer page for your brand in your county.

McHenry County, IL

Lake County, IL

Cook County, IL

Kane County, IL

DuPage County, IL

Will County, IL

Boone County, IL

Not Listed?

If you do not see your ZIP code or city above, contact us or call (224) 220-3660. We may still serve your area or help you find a custom solution.

ZIP code coverage last reviewed September 20, 2026 against our online booking service area.

GSHA Services, LTD | Licensed HVAC, Electrical & Generator Professionals Serving Illinois & Wisconsin

Carrier AC installation and repair across our service area. GSHA Services installs current Carrier air conditioners and services and repairs existing R-410A systems throughout the Illinois and Wisconsin communities listed above. See the current Carrier models and installed prices or book air conditioning repair.

Lennox installation by county. GSHA Services is a Lennox Premier Dealer; see the Lennox pages for McHenry County, Lake County, Kane County, DuPage County, Cook County and Will County for the communities served, permit rules and utility rebate programs in each county.