Plumbing Services in Decatur, IL

Full-Service Plumbing & HVAC for Decatur Homeowners & Small Businesses

Since 1976, Mike Williams Plumbing, Heating, Air Conditioning & Sewer has been the central Illinois home services company Decatur residents count on. Our contractors bring 180 years of combined experience to every job, and we’ve held an A+ rating as an Accredited member of the Illinois Better Business Bureau since 1999. We handle both plumbing and HVAC under one roof, so you never have to juggle multiple contractors when something goes wrong.

Our founding motto still guides how we work: all home services should be faster, cleaner, and better. That standard applies to every service call we take in Macon County.

Call (217) 673-0758 to schedule same-day plumbing or HVAC service in Decatur, IL. We’re available 24/7 for emergencies and back every job with a 100% satisfaction guarantee.

Why Decatur Homeowners Call Us First

When something breaks, you want a company that shows up prepared, communicates clearly, and stands behind the work. Here’s how we deliver on that:

• 100% Satisfaction Guarantee: Every plumbing and HVAC service we perform is backed by a full satisfaction guarantee. The job isn’t done until you’re happy with it.
• Fully Stocked Trucks: Our technicians arrive with the parts and equipment needed to complete most jobs on the first visit, saving you the hassle of a return appointment.
• Same-Day Service: We aim to reach you the same day you call, because most home comfort problems can’t wait.
• 24/7 Emergency Service: Burst pipe, failed furnace, or a drain backing up at midnight: we’re available around the clock for plumbing and HVAC emergencies.
• Home Respect Standards: Our technicians wear shoe covers, explain what your system needs before they start, and treat your home the way they’d want their own treated.
• EPA-Certified & Licensed: We’re EPA-certified, licensed, and insured to service and install HVAC systems throughout Macon County.
• 4.6-Star Rating: Across 144 reviews, customers consistently highlight our professionalism, clear communication, and fair pricing.

Members of our Priority Maintenance Club receive priority same-day scheduling, a 10% discount on all services, and three free safety inspections each year: two HVAC and one plumbing. It’s the simplest way for Decatur homeowners to stay ahead of seasonal maintenance without managing multiple service contracts.

HVAC Services in Decatur, IL

Central Illinois winters are punishing. Arctic cold and relentless wind make a properly sized, well-maintained heating system a safety issue, not just a comfort preference. Summers push the other direction: hot, humid conditions that make reliable air conditioning essential. Our technicians are regularly trained to work on all major HVAC brands and models, and we serve both residential and commercial customers across the Decatur area.

Our HVAC services include:

• Heating services
• Cooling services
• Heat pump systems
• Indoor air quality
• HVAC maintenance
• Commercial HVAC

Heating & Heat Pump Service for Macon County Homes

Ducted natural gas furnaces are the most common heating choice for Decatur homes and businesses, and we’ve been installing them here since 1976. We stock a broad range of gas furnaces, from affordable replacement systems to advanced condensing units, and our technicians can service any brand already in your home. Regular furnace maintenance extends equipment life and keeps your system running efficiently when temperatures drop hardest.

Heat pump systems use a reversing valve to switch between efficient heating in winter and air conditioning in summer. We provide professional maintenance and repair for heat pumps regardless of brand, helping keep them running at full efficiency year-round.

Our services include:

• Gas furnace installation & repair
• Heat pump service
• Boiler service
• Emergency heating repair

Central Air Conditioning Installation & Repair

We’ve been installing and repairing central AC systems in the Decatur area since 1976. Our technicians are EPA-certified and locally licensed to service and install central air conditioning systems for Macon County homeowners and businesses. Every member of our service team is insured and can diagnose and repair any central AC system, regardless of brand or age.

Decatur air conditioning services include:

• AC installation
• AC repair

Plumbing Services in Decatur, IL

Older homes across Macon County face a familiar set of plumbing challenges: aging pipes, sewer line wear, and sump pump systems working hard to manage drainage in central Illinois soil conditions. The City of Decatur has announced a lead water line replacement program beginning in 2027 that will address thousands of service lines connected to old lead goosenecks and galvanized pipes. If your home was built before 1945, it’s worth having a trusted local plumber assess what’s underground before those issues become emergencies.

Our plumbing services cover the full range of what Decatur homeowners need:

• Water Heater Installation & Service: We install and service electric tank, gas-fired tank, advanced gas tankless, and heat pump water heater types, and we stock the parts to correct most problems on the first visit.
• Sump Pump Installation & Service: We’re a designated Decatur sump pump system provider, offering installation and service for homes that depend on reliable flood protection.
• Drain & Sewer Line Cleaning: From slow drains to full blockages, we clear and service sewer lines for residential and commercial properties.
• Leak Repair & Pipe Replacement: We locate and fix leaks, and handle full pipe replacement when the situation calls for it.
• Water Heater Service: Installation, repair, and replacement across all major water heater types.
• Sump Pump Systems: Installation, inspection, and emergency service for sump pump systems throughout Macon County.

We’re available 24 hours a day for emergency plumbing repairs, including burst pipes and after-hours sewer and drain cleaning. When something can’t wait, neither do we.

Schedule Your Decatur, IL Service Today

Get same-day scheduling, 24/7 emergency availability, and a 100% satisfaction guarantee on every job. Call us or request service online, and we’ll work to get a technician to you today.

Ready to schedule? Call (217) 673-0758 to reach Mike Williams Plumbing, Heating, Air Conditioning & Sewer and book your plumbing or HVAC service in Decatur, IL.