Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Communication Breakdown; Situational Awareness; Time Pressure; Troubleshooting
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Illness / Injury; Flight Deck / Cabin / Aircraft Event Passenger Misconduct; Ground Event / Encounter Weather / Turbulence
Flight Crew Returned To Gate; General Flight Cancelled / Delayed; General Release Refused / Aircraft Not Accepted
Aircraft
I attempted multiple conversations with local zone/gate leadership and I was advised that we WOULD use an aircraft that just had returned to the gate due to excessive heat in the cabin.  The aircraft gate returned as Aircraft X which was ZZZ to ZZZ1 and was planning to go out immediately as Aircraft Y ZZZ to ZZZ2. It appears that flight Aircraft X was swapped with flight Aircraft Y.  I was not able to locate any repairs on Aircraft Z after its return to block.  I spoke with [the Captain] who was taking the ZZZ2 trip and after making some calls; he refused the equipment.The ZZZ1 passengers came off the plane yelling; to almost screaming; and were visibly wet and beyond agitated.  The ZZZ emergency line had to be called for backup at the gate return to protect our team.I overheard a conversation between the ZZZ1 FAs and the flight deck that they could hear the screaming over the intercom from the passengers.This is not humane treatment for our coworkers nor should our passengers have to deal with extreme heat.
Captain reported returning to the gate and refusing the aircraft due to excessive temperature in the cabin.