HVAC Services in Grafton, WI

Grafton Comfort Problems, Solved the Right Way

Whether it is a furnace that will not light in an Ozaukee County cold snap or an AC that cannot keep up with July humidity off Lake Michigan, Grafton homeowners can reach On Time Heating & Cooling around the clock at (262) 671-8999. A live person answers and a tech is dispatched with a real arrival window.

Founded in 2019 and still owner-run by Shane Herro, On Time has earned a 5.0★ Google rating across 480+ reviews by doing the unglamorous things right: honest diagnostics, properly sized installs, and showing up when we said we would.

HVAC and Water Heater Services for Grafton

• Furnace repair, replacement & tune-ups
• Air conditioning service & installation
• Cold-climate heat pumps & dual-fuel setups
• Boiler repair & replacement
• Ductless mini-splits for additions and problem rooms
• Water heater service & tankless conversions
• Indoor air quality & duct cleaning

Lake-Adjacent Weather Is Hard on Equipment

Grafton's mix of established village blocks and newer subdivisions means we see everything from layered renovations on older systems to builder-grade equipment reaching its first replacement cycle. Wisconsin freeze-thaw plus humid summers punish weak components, so we measure before we recommend: load calculations for sizing, static pressure for airflow, combustion analysis for safety.

Decide With Confidence

Our Free Second Opinion reviews any competing repair or replacement quote line by line, free. Wisetack financing offers 0% intro APR for qualified buyers with a soft-pull prequalification. The On The Dot Club keeps tune-ups on schedule with priority dispatch and repair discounts.

Book Grafton Service

Call (262) 671-8999 or book online. We also cover Thiensville, Bayside, and Fox Point.