How Do I Cool My House When My AC Is Broken?
Start by blocking heat before it enters: close every blind and curtain on sun-facing windows, which cuts solar gain by up to 45%. Then move air — run ceiling and box fans during the day, and open windows on opposite sides of the house at night when Frederick temps drop into the 70s. Skip the oven, stove, and dryer, take cool showers, and retreat to the basement, which stays 10–15°F cooler than upstairs. These steps can hold a house 5–10°F below where it would otherwise climb.
Cooling tactics without AC: effort versus payoff
| Tactic | Effort | How much it helps |
|---|---|---|
| Close blinds and curtains on sun-facing windows | Low | Blocks up to 45% of solar gain; biggest single daytime move |
| Night flush: open opposite windows plus a box fan | Low | Drops indoor temps 5–10°F using cool overnight air |
| Skip oven, stove, and dryer until after dark | Low | Keeps 2–4°F of appliance heat out of living spaces |
| Retreat to the basement | Low | Instantly 10–15°F cooler; best sleeping spot in a heat wave |
| Ceiling and box fans on occupied rooms only | Low | Feels 4°F cooler via evaporation; no effect on empty rooms |
| Cool showers and steady water intake | Low | Lowers body temperature directly when room air can't |
Work the house: block, flush, and avoid heat
Daytime is defense. Close blinds and curtains before the sun hits each side of the house — south- and west-facing windows matter most. Keep exterior doors shut, and turn off incandescent lights and idle electronics, which all add heat. Point fans at people, not rooms: a fan cools skin by evaporation, so running one in an empty room wastes electricity and adds motor heat.
Night is offense. Frederick typically drops into the 60s and 70s after dark even during 90°F+ stretches, so open windows on opposite sides of the house and set a box fan blowing hot air out of an upstairs window. This cross-ventilation flush can pull indoor temps down 5–10°F by morning. While you work the house, book your repair — knowing what an emergency AC call costs versus a standard morning slot tells you which one to schedule.
- Close sun-facing blinds by 8 a.m.; reopen everything once outdoor air is cooler than indoor.
- Run the box-fan exhaust upstairs and intake windows downstairs for a whole-house draft.
- Cook outside or microwave-only until evening; run the dishwasher and dryer overnight.
Protect people, and know when heat turns dangerous
Cooling bodies beats cooling rooms once indoor temps climb. Take cool (not cold) showers, drape a damp cloth on the neck and wrists, drink water steadily, and sleep in the basement — the coolest 10–15°F in the house. Infants, adults over 65, and anyone with heart or respiratory conditions should spend the hottest hours in air conditioning somewhere: a library, a mall, or a neighbor's house.
The hard line is 85°F indoors with vulnerable people home. Past that point, heat exhaustion risk rises fast, and dizziness, nausea, or confusion means the stopgaps have failed. That combination is a true AC emergency, and it justifies calling Frederick emergency AC repair after hours instead of waiting for a morning appointment.
- Check on elderly household members and neighbors twice a day during a heat wave.
- Watch for heat-exhaustion signs: heavy sweating, dizziness, nausea, or confusion.
- If the house holds above 85°F overnight with at-risk people, relocate them and call now.
Questions homeowners ask next
How Do I Cool My House When My AC Is Broken?
Close all blinds against the sun, run fans on occupied rooms, and flush the house with cool night air through opposite windows. Skip the oven and dryer, take cool showers, and sleep in the basement. These steps hold a house 5–10°F cooler until repair.
Do fans actually lower the room temperature?
No — fans cool people, not rooms, by speeding evaporation off your skin, which feels about 4°F cooler. Turn fans off in empty rooms; the motor adds heat. The exception is a window fan exhausting hot air at night, which does lower room temperature.
How hot is too hot to stay in the house?
Sustained indoor temps above 85°F are the danger line for infants, adults over 65, and people with heart or lung conditions. If cooling tactics can't hold below that, move vulnerable people to an air-conditioned location and treat the failure as an emergency.