Repairing an air conditioner blowing hot air involves checking core mechanical systems. Step 1: Verify thermostat settings are correct and lower the target temperature. Step 2: Inspect the indoor air filter and replace it if it is choked with dust to prevent frozen evaporator coils. Step 3: Check the outdoor condenser unit to ensure airflow is unblocked and the capacitor is functioning. Step 4: If refrigerant lines are frosted over, turn the system off immediately to let it thaw completely before restarting. Verification: Confirm supply vent air temperature drops significantly once troubleshooting steps are completed.
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