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 MANUALSSUBARU1996LEGACY WAGON 4WD F4-2.2L SOHCREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL MODULE HVACDESCRIPTION AND OPERATION
1996 Subaru Legacy Wagon 4WD F4-2.2L SOHC
Control Module HVAC: Description and Operation
1996 Subaru Legacy Wagon 4WD F4-2.2L SOHCSECTION Description and Operation
Fan Control Amplifier
The fan control amplifier is located on the cooling unit. It amplifies a 12-step base current flowing from the auto amplifier to change blower speed.
Hi Relay
The Hi relay is located on the heater unit. It receives a signal from the auto amplifier to operate the blower motor at high speed.
The fan control amplifier is located on the cooling unit. It amplifies a 12-step base current flowing from the auto amplifier to change blower speed.
Hi Relay
The Hi relay is located on the heater unit. It receives a signal from the auto amplifier to operate the blower motor at high speed.
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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.