When a heating or cooling failure becomes a health issue, a temperature record is stronger than saying the apartment was “freezing” or “unbearably hot.” Use consistent measurements and keep the repair timeline with them.

  1. Use a reliable indoor thermometer Place it in the living area away from direct sun, the stove, a vent, or an open window. Use the same location for repeat readings.
  2. Record date, time, indoor temperature, and thermostat setting Take a photo that shows the thermometer reading and, when useful, the thermostat. Keep a written log so you can see how long the unsafe condition lasted.
  3. Save local weather information Note the outdoor temperature from a reliable weather source. This helps show the severity of the condition and whether the system could keep up.
  4. Document system symptoms Video a thermostat that calls for heat while vents blow cold air, an AC unit that will not start, leaks around the equipment, or error messages—without opening panels.
  5. Track every maintenance contact Save emergency calls, work orders, no-shows, parts delays, portable-unit offers, and repair dates.
  6. Document health or relocation impacts carefully If you had to leave the unit, buy fans or heaters, use a cooling center, or seek medical care, save receipts and records. Do not disclose more medical information to management than necessary.

Where to Get Help

Important: Do not use ovens, grills, generators, or other unsafe devices to heat or cool a home. Carbon monoxide and fire hazards can be fatal.

RentalFacts.online: You can also document the property problem publicly through Report a Rental on RentalFacts.online.

This guide provides general U.S. rental-housing information, not legal advice. Landlord-tenant law, notice rules, repair deadlines, entry rules, deposit rules, and tenant remedies vary by state and locality.