Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2012IMPREZA WRX STI F4-2.5L DOHC TURBOREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL ASSEMBLYSERVICE AND REPAIRCONTROL UNIT (MANUAL A/C MODEL)
2012 Subaru Impreza WRX STI F4-2.5L DOHC Turbo
Control Unit (Manual A/C Model)
2012 Subaru Impreza WRX STI F4-2.5L DOHC TurboSECTION Control Unit (Manual A/C Model)
Control Unit (Manual A/C Model)
REMOVAL
1. Disconnect the ground cable from battery.
2. Remove the ornament panel.
3. Remove the control wires from both sides of the heater and cooling unit.

4. Remove the screws and claws, and remove the control module from the ornament panel.

INSTALLATION
CAUTION: Securely assemble the plate at the end of the control wire to the heater case.
Install each part in the reverse order of removal.
CONTROL MODULE
Tightening torque: 2 N.m (0.20 kgf-m, 1.5 ft-lb)
REMOVAL
1. Disconnect the ground cable from battery.
2. Remove the ornament panel.
3. Remove the control wires from both sides of the heater and cooling unit.
4. Remove the screws and claws, and remove the control module from the ornament panel.
INSTALLATION
CAUTION: Securely assemble the plate at the end of the control wire to the heater case.
Install each part in the reverse order of removal.
CONTROL MODULE
Tightening torque: 2 N.m (0.20 kgf-m, 1.5 ft-lb)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.