My thermostat won't go below 70 degrees Celsius. What can I do to fix this?

If your thermostat refuses to lower the cooling setpoint below 70 degrees (note that 70 degrees Celsius is an extremely lethal 158 degrees Fahrenheit, so this usually refers to Fahrenheit or a severe programming restriction), the issue is typically caused by a high-temperature lock, energy-saving restrictions, or a faulty scale setting. Many modern programmable and smart thermostats feature administrator locks, hotel mode limits, or eco-mode boundaries designed to prevent users from setting temperatures below a specific energy-saving threshold. To fix this, access your thermostat's on-screen settings menu, check for any active keypad locks, eco boundaries, or PIN restrictions, and disable them. If the thermostat is stuck in Celsius instead of Fahrenheit, you can change the display units in the settings menu. You can verify success when you can adjust temperatures freely.