AC Repair in Janesville, WI
Air conditioners here run from June through August. If yours quits, tell us what it's doing and a licensed contractor who covers Rock County will get in touch.
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Three months of heavy use, and storms in between
Janesville only asks a lot of your air conditioner from June through August, but it asks hard. Afternoons averaging 81°F mean the compressor runs long stretches to hold the house steady, and it does that for three months straight with little rest between cycles.
Rock County has also logged 41 hail events and 78 damaging wind events over the past ten years. Hail up to 2 inches can bend the thin fins on your outdoor coil, and wind can pull debris into the unit or knock it out of level. Either one can show up as an AC that runs but does not cool like it should.
- 3 months
- June through August, your air conditioner is on duty
- 81°F
- the average summer afternoon it cools against
- 41 hail events
- in ten years, and hail bends the fins on outdoor coils
- 78 wind events
- in ten years, and wind drives debris into outdoor units

NOAA nClimDiv, 1991–2020 normals
A new air conditioner would save little on running costs in Rock County, so the repair decision comes down to the unit's condition.
Estimates for a typical Rock County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, Wisconsin fuel prices and NOAA climate normals. Your home will differ.
Repair makes sense when a part like a capacitor or contactor has failed.
Replacement makes sense when the compressor has failed or the system uses R-22 refrigerant, which is no longer made.
Wisconsin requires contractors to register with the state.
That registration puts the business on file with the state, nothing more. Nobody tested this contractor's HVAC knowledge to get that number, and no state board is grading their repair work. Wisconsin also blocks Rock County and its cities from layering on their own license requirement, so the registration is the only state-level record that exists for this trade here.
For an air conditioner repair, the part that actually matters is federal. Any technician who opens the refrigerant lines to recover, recharge, or replace a component has to hold EPA Section 608 certification, and that rule applies the same in Wisconsin as it does everywhere else in the country. That certification is what says someone was tested on handling refrigerant safely, which the state registration never claims to cover.
Sources: Wisconsin Legislative Reference Bureau · Wisconsin Department of Safety and Professional Services
- Why is my AC not blowing cold air?
- Most often the filter is clogged and starving the system of airflow, or the refrigerant level is low from a leak. A dirty filter makes the evaporator coil freeze over, and once that happens you get weak air that isn't cold even if you swap the filter right away. It's also worth checking the thermostat is set to cool and not just fan. If the filter looks fine and the air is still warm, a contractor needs to check refrigerant levels and the coil, since a leak won't fix itself.
- Why is my AC leaking water?
- The condensate drain line is probably clogged. Your AC pulls moisture out of the air as it cools, and that water is supposed to run out through a drain line to the outside. Algae and debris build up in that line over time and block it, so the water backs up and drips inside instead. A frozen evaporator coil that's now thawing can also cause a sudden puddle, which usually points back to low refrigerant or restricted airflow.
- Why won't my AC turn on?
- Start with the thermostat batteries and the breaker for the outdoor unit, since those cause more no-start calls than anything else. If the breaker keeps tripping when you reset it, don't keep resetting it, that usually means the compressor or a wire is drawing too much current. Summers here only run June through August, so a unit that sat off for months can also fail to start just from a stuck capacitor or contactor that needed to move again.


