Heater Valve

WARNING: This page is about a different variant/trim than selected.

CAUTION: Check that the DTC B1452 (heating expansion valve circuit) is not displayed.

Visually check that there is no dirt or damage on the expansion valve - heater assembly. Clean or replace as necessary.
Attach the manifold gauge set. Ref. to AIR CONDITIONER (HEV)>REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET>PROCEDURE .
Preparation tool:

Manifold gauge set
Using the Subaru Select Monitor, select [Heating electric expansion valve] under [Air Conditioner] in the active test list. Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>ACTIVE TEST .

Set the vehicle to the following conditions.

Item	Condition
READY	ON (engine stopped)
Temperature control switch	HI (MAX HOT)
Fan dial	HI (MAX)
Ambient temperature	10 - 25°C (50 - 77°F)
Engine coolant temperature	40°C (104°F) or less
A/C switch	OFF
Driving cycle status (Confirm on Data Monitor.)	Heating

Manipulate the active test input value, and check whether the manifold gauge value changes.
NOTE: Check with active test input values in the range of 5 - 100%.
If the check results show that the value does not change, replace the expansion valve - heater assembly.