Thermostat cycles equipment rapidly on and off (short run times) in cooling mode

Safety first: No wiring changes are required for basic adjustments.

Steps to troubleshoot:

• 1. Adjust cycle rate: In advanced settings, reduce the cooling cycles-per-hour setting to a lower value appropriate for your system.
• 2. Increase differential: If available, increase the cooling temperature differential so the system runs longer per cycle.
• 3. Check location: Ensure the thermostat is not in a draft or directly in the path of a supply vent.
• 4. Observe operation: After adjustments, monitor several cooling cycles to confirm longer, more stable run times.

When to call a professional: Persistent short cycling may indicate an oversized system or refrigerant issues that require an HVAC technician.