DETAILS:

On some vehicles, the front heater may not provide warm air when front heat is selected. A Water Valve was added to assist in bleeding air from the rear heater during vehicle production. If the Water Valve is in the "CLOSED" position, the front heater will not provide heat.

Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE

1. Verify customer complaint.
2. Locate the Water Valve in the front heater hose (under cowl at passenger side bulkhead).
   
   
    
3. Move the Water Valve to the "OPEN" position.
   WARNING:
   • NEVER REMOVE THE COOLING SYSTEM CAP OR LOOSEN THE RADIATOR DRAIN PLUG WHILE THE ENGINE IS RUNNING, OR WHEN THE ENGINE AND RADIATOR ARE HOT. SCALDING COOLANT AND STEAM MAY SHOOT OUT AND CAUSE SERIOUS INJURY. IT MAY ALSO DAMAGE THE ENGINE AND COOLING SYSTEM.
   • TURN OFF THE ENGINE AND WAIT UNTIL IT HAS COOLED. EVEN THEN, BE VERY CAREFUL WHEN REMOVING THE CAP. WRAP A THICK CLOTH AROUND IT AND SLOWLY TURN IT COUNTERCLOCKWISE 2.5 TURNS. STEP BACK WHILE THE PRESSURE ESCAPES.
   • WHEN YOU ARE SURE ALL THE PRESSURE IS GONE, TURN THE CAP USING THE CLOTH, AND REMOVE IT.
4. Inspect the coolant level in the cooling system reservoir, and if necessary, add coolant to the "FULL" mark.
5. Start the engine and run it until the cooling fan operates.
6. Set the heater controls to MAX. front heat.
7. Confirm that heat is coming out of the front heater vents, and the heater is operating normally.
8. Inspect the engine and HVAC System for coolant leaks.
9. Stop the engine and allow it to cool.
10. Inspect the coolant level and if necessary, add coolant to the "FULL" mark.
11. Verify repair.

WARRANTY INFORMATION

Note: This information applies to verified customer complaints on vehicles covered under normal warranty. Refer to the SRT microfiche for warranty term information.

Note: Additional diagnostic time cannot be claimed for this repair.

CONSUMER NOTICE:

The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by "do-it-yourselfers." Consumers should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies, consumers should contact their nearest authorized Mazda dealership.