Cooling and heating system — troubleshooting (Opel Ascona C)

Symptom/ Cause(s)

• Lack of coolant in the system
• The electric fan does not work
• Internal or external clogging of the radiator
• A kink in one of the hoses impairs the circulation of coolant
• Thermostat is faulty
• The engine needs adjustment
• Ignition too late or automatic ignition advance controller not working
• The cylinder head gasket is leaking
• The engine has not yet been broken in
• Partial blockage of the exhaust system
• Engine oil level too low. Brakes sticking.

• The thermostat is faulty, the wrong brand, or missing altogether.
• Coolant loss
• The hose clamps have become loose
• The hoses are damaged or leaking
• The radiator is leaking
• The expansion tank cap is leaking
• Cylinder head gasket is leaking There is a crack(s) in the block or cylinder head.
• The heater does not provide enough heat
• Engine too cold (see above)
• The heater core is clogged
• Heater control rods and levers are incorrectly adjusted or damaged.