Troubleshooting

• Heater does not work
  • Step 1: Mechanical inspection
  • Step 2: Main fuse
  • Step 3: Overheating fuse
  • Step 4: Battery
  • Step 5: Fuel pump
  • Step 6: Relay
  • Step 7: Relay voltage
  • Step 8: Heater air blower
  • Step 9: Heater air blower speed
  • Step 10: Glow/spark plug
  • Step 11: Fuel pump
• No warm air flow
  • Step 1: Warm air duct
  • Step 2: Fuel delivery
  • Step 3: Glow-spark plug
• Heater smokes
  • Step 1: Exhaust pipe
  • Step 2: Fuel pump
  • Step 3: Combustion air intake
  • Step 4: Combustion air blower motor
• Insufficient heat output
  • Step 1: Fuel pump
  • Step 2: Temperature regulating system
  • Step 3: Engine heat exchanger
  • Step 4: Engine cooling air housing
• Heater dies
  • Step 1: Electrical connections
  • Step 2: Exhaust pipe
  • Step 3: Thermo switch
  • Step 4: Fuel pump
• Run-on continues
  • Step 1: Thermo switch
• Heater does not work at low outside temperature
  • Step 1: Battery
  • Step 2: Fuel pump
  • Step 3: Glow-spark plug
  • Step 4: Thermo switch