If the cooling still doesn't come on, but has worked in the past, call a professional HVAC contractor to assist you. Make sure the circuit breaker switches for the furnace are on.If the thermostat indicates a call for cool, verify that the furnace door is securely closed and that the power switch on the furnace is set to On.This delay is to protect your equipment from short cycling. If the "cool on" or the snowflake icon is flashing, the thermostat is in delay mode, which can take up to 5 minutes. Check the thermostat's display to confirm that there's a call for cooling, usually indicated by the words "cool on" or a snowflake icon.Verify that the thermostat is switched to cool mode and has a cooling set point below the room temperature reading.If that's not the case, then try the following steps: If you're signed up for a saver switch through your utility company, they may be temporarily locking you out during peak demand hours.
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