Fix Ecobee A/C Configuration

I have a pair of Ecobee thermostats that happily fire up the furnace, yet when summer arrives the central A/C only spins the fan—no cold air ever reaches the rooms. The system itself is sound; if I bypass the Ecobee at the air-handler everything cools properly, so the wiring, condenser, and refrigerant charge are fine. Something in the Ecobee configuration, wiring assignments, or advanced settings is clearly blocking the call for cooling.

Here is the exact scenario you’ll walk into:

• HVAC type: conventional central air conditioning with separate furnace and condenser
• Symptom: Ecobee calls for cooling, condenser starts, but supply air stays warm
• Heating mode works perfectly through the same Ecobee

Your task is to diagnose the root cause—whether that’s an incorrect wire mapped in the Ecobee terminal, an unmet O/B reversing-valve setting, an installer-level option, or a firmware quirk—and guide me through the fix so that a normal Cool call actually delivers cold air. Remote support is fine as long as we can screen-share the thermostat interface or use a video call at the air-handler.

Deliverables
• Step-by-step instructions (or live guidance) to correct the configuration
• Confirmation test showing supply temp dropping to spec once cooling is engaged
• A short note summarizing any setting changes so I can repeat them if I ever reset the unit

Once the air leaving the vents is cool again, the job is done.