Furnace Repair in Monroe, WI — Same-Day and Emergency Service Available

Your furnace stopped working. We're the local HVAC contractor Green County homeowners have called for over 135 years — available every day of the year, for every major brand.

When Your Furnace Goes Out, You Need Someone Today

A furnace failure in a Wisconsin winter is not a schedule-next-week problem. Lanz dispatches to Monroe and Green County every day of the year — including weekends and holidays. We service all makes and models, so you don't need to wonder whether we work on your system before you call.



If your furnace isn't producing heat, is cycling on and off, or has shut down completely, call us. We'll tell you what's wrong before any repair work begins.

365-Day Emergency Furnace Repair for All Brands

Emergency furnace repair is available every day of the year — not just business hours, not just weekdays. Whether your system is a Lennox, Carrier, Trane, Rheem, or any other major brand, our technicians diagnose and repair it.

Common Furnace Repairs We Handle in Monroe, WI

Most furnace failures come down to a handful of components. Our technicians diagnose the system first, identify the cause, and walk you through the repair and cost before any work begins.

Ignitor and Flame Sensor Failure

A failed ignitor or dirty flame sensor is one of the most common reasons a furnace won't start. The fix is typically straightforward — but the diagnostic matters, because similar symptoms can point to different causes.

Blower Motor Issues

If your furnace runs but produces little or no airflow, the blower motor or its capacitor is often the cause. We test the full airflow system to confirm the source before recommending a repair.

Thermostat and Control Board Failures

Sometimes the furnace itself is fine and the problem is upstream — a thermostat that's lost its connection or a control board that's no longer communicating with the system. We trace the fault to its source rather than guessing at components.

Clogged Filters and Airflow Restriction

A severely restricted filter can cause a furnace to overheat and shut down on a safety limit. If your system is short-cycling or shutting off before reaching temperature, restricted airflow is the first thing we check.

What a Furnace Service Call Looks Like

We diagnose before we repair. When a Lanz technician arrives, they assess the full system — not just the part that appears to have failed. You get a clear explanation of what's wrong and what it will cost before any repair work starts. No surprise invoice at the end.

If the repair cost approaches the value of a new system, we'll tell you that too. Free estimates on new Lennox systems mean you have a real comparison to make — not just a pressure decision on a cold day.

Furnace Repair or Furnace Replacement — We'll Help You Decide

Some furnaces are worth repairing. Others have reached the point where a replacement is the better investment. We give you an honest assessment of both options. If a new system makes more sense, we'll provide a free estimate on a Lennox replacement with financing available — no obligation to decide on the spot.

Serving Monroe and Green County for Furnace Repair

Lanz Furnace & Fireplace is based in Monroe, WI and provides furnace repair throughout Green County, including Monticello, New Glarus, and Brodhead. View the full list of areas we serve, or call our Monroe office to confirm we cover your location. The technician who shows up is your neighbor, not whoever was available in the queue.

Frequently Asked Questions — Furnace Repair in Monroe, WI