AC quit in a Rockford heat wave

Quick checks at the furnace and the condenser

1. At the thermostat: cooling mode, and a setpoint lower than the current room reading.
2. At the electrical panel: one breaker for the furnace, another for the outdoor condenser, and a separate shutoff box on the house wall next to the condenser. Reset a tripped breaker a single time.
3. At the furnace: its service switch has to be on, because the furnace blower is what pushes the cooled air upstairs.
4. At the filter slot: a clogged filter gets replaced now.
5. On the copper lines: frost or ice means switch the system off, set the fan to run, and let it melt. Restarting a frozen system risks the compressor.

Watch the people, not the thermostat

The airport reading is taken in open ground south of the city. A second-floor bedroom under a Rockford roof in July can run well past it. The National Weather Service describes two stages to watch for.

Heat exhaustion. Signs include heavy sweating with skin that feels cold, pale and clammy, a pulse that is fast but weak, nausea, unusual tiredness, dizziness, headache, or fainting. Get the person somewhere cooler, loosen tight clothes, and have them take small sips of water.

Heat stroke. Body temperature reaches 103°F or more, the skin turns hot and red, the pulse is fast and strong, and the person may become confused or pass out. That is a 911 call, not a wait-and-see.

A box fan feels like help, but the CDC cautions that electric fans may not prevent heat-related illness once it gets very hot. A few hours in an air-conditioned building does more: the public library, a big store, a cooling site, a relative with working central air.

Finding a cool place

Cooling sites around Rockford are announced heat wave by heat wave, and the locations and hours shift. Look at the current notices from the City of Rockford and from Winnebago or Boone County, and phone the site before heading over.

Paying the utility bill

The state's Low Income Home Energy Assistance Program runs through the Illinois Department of Commerce and Economic Opportunity. What the DCEO page says about it:

• Its main purpose is helping eligible households with home energy costs, mostly winter heating.
• Income limits are reset each year, capped at 60% of state median income.
• Applications go through a local agency, and the state lists those agencies by county.
• The Help Illinois Families call center number is 1-833-711-0374.

Which months bring Rockford's 85 degree afternoons

How often Rockford gets this hot

Across 2016-2025 the airport logged an average of 18.8 days a year at 90°F or higher, nearly all of them between June and August. This year's peak so far was 96°F on July 27, 2026. The top reading in the record we pulled is 105°F, set July 7, 2012. See every year of it.