No/Low Heat From Heater or Defroster

DESCRIPTION
A low engine coolant level in the radiator can cause poor heater and defroster performance. If this condition exists, perform the following:

PROCEDURES
1. With cold engine, remove pressure relief cap.
2. With 50/50 mixture of Premium Cooling System Fluid E2FZ-19549-AA or-B in Oregon, F5FZ-19549-CC, in Canada, CXC-8-B, Recycled Coolant, or equivalent meeting Ford specification ESE-M97B44-A and water, fill degas bottle to indicated level and replace pressure relief cap. Note level.
3. Start the engine and run until the water thermostat opens.
4. Observe the engine coolant level in the degas bottle. The minimum level should be as specified in Step 2. if not, adjust engine coolant level by adding a 50/50 mixture of Premium Cooling System Fluid and water.
5. Check for leakage at:
- All hoses and hose connections.
- Radiator seams, radiator core and radiator draincock.
- Cylinder block core plug and drain plugs.
- Edges of all cooling system gaskets.
- Transmission oil cooler fittings.
- Vehicle heating system components.
- Water pump.
- Internal cylinder block, and cylinder head passages.

6. Examine oil level dipstick for evidence of engine coolant in engine oil.
7. Check radiator for evidence of transmission fluid in coolant (leakage at transmission oil cooler).
8. Install cooling system analyzer to assist in testing the engine cooling system. Follow the manufacturer's recommended connections and testing procedures.