Coolant Heater Check, Webasto

1. Using compressed air, clean any accumulated debris or dust from the heater and enclosure box. Inspect all components for wear or damage.
2. Check that the batteries are in good condition. If the voltage is too low or too high, the heater will automatically shut down. Check the wiring harnesses for damage. Replace the harnesses if necessary.
3. Check the air intake port for obstructions. Carefully check the air intake tube for any restrictions or damage, and repair or replace the tube if necessary.
4. Check the exhaust system for restrictions or corrosion. Replace any damaged parts.
5. Change the fuel filter, if so equipped. Inspect the fuel line for damage, restrictions, or loose connections. Repair or replace the line if it is damaged.
6. Inspect all coolant lines and clamps for leakage, restrictions, or damage. Replace the lines as needed. Inspect the coolant circulation pump for leakage. Repair or replace the pump if it is damaged.
7. Run the heater at least once a month for 10 minutes.
8. Check the water and fuel connections for leakage. Tighten the hose clamps if needed.