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.
2021 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE
THERMO Control Valve Assembly
| Flow rate characteristics | Position 1 | Radiator port | 20.9 kPa (2.1 mAq) @ 100 L (26.4 US gal, 22.0 Imp gal)/min |
| Position 2 | Bottom port | 41.6 kPa (4.2 mAq) @ 100 L (26.4 US gal, 22.0 Imp gal)/min | |
| Position 3 (fully closed) | - | - | |
| Position 4 | Bottom port | 15.7 kPa (1.6 mAq) @ 30 L (7.9 US gal, 6.6 Imp gal)/min | |
| Heater port | 28.5 kPa (2.9 mAq) @ 20 L (5.3 US gal, 4.4 Imp gal)/min | ||
| Position 5 | Radiator port | 9.7 kPa (1.0 mAq) @ 100 L (26.4 US gal, 22.0 Imp gal)/min | |
| Heater port | 12.0 kPa (1.2 mAq) @ 20 L (5.3 US gal, 4.4 Imp gal)/min | ||
| Responsiveness | Fully closed - Fully open | sec | 2 or less |
| Sensor output range | V | 0.539 - 4.141 (mechanical stop position: 4.297) | |
| Rotor operation range | deg | 174 | |
| Fail-safe thermostat | Type | Temperature, pressure relief | |
| Starting temperature to open | °C (°F) | 105 - 109 (221 - 228) | |
| Starting pressure to open | kPa (mAq) | 210 - 290 (21.4 - 29.6) | |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.