What does it mean when the cool light is blinking on your thermostat?
What does it mean when the cool light is blinking on your thermostat? If the "cool on" or the snowflake icon is flashing, the thermostat is in delay mode, which can take up to 5 minutes. This delay is to protect your equipment from short cycling. What does a red flashing light on a furnace mean? If you see the red flashing light during regular operation, this usually means that the outdoor unit was shut off due to a problem and is currently “locked out” from normal operation. When you see the red flashing light, it is usually in a...