Thermostat shows 'Waiting' or 'Delay' for several minutes before starting equipment

Note: This behavior is often normal and protects the compressor.

• Step 1 – Wait out the delay: Most Trane thermostats impose a 3–5 minute delay after power loss or mode change before starting the compressor.
• Step 2 – Avoid rapid changes: Do not repeatedly change modes or setpoints; allow the system to complete cycles.
• Step 3 – Check delay settings: In installer setup, verify the anti-short-cycle delay is set to a reasonable value (e.g., 3–5 minutes).
• Step 4 – If delay exceeds 10 minutes consistently: There may be a communication or safety lockout issue that needs professional diagnosis.