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Obstructed Coolant Flow

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

Possible locations or causes of obstructed coolant flow are as follows:

  1. Inoperative water pump
  2. Inoperative engine thermostat (stuck or sticking closed)
  3. Pinched or kinked heater hoses
  4. Improper heater hose routing
  5. Plugged heater hoses or supply and return ports at the cooling system connections
  6. Plugged heater core or heater core tubes

If proper coolant flow through the engine cooling system and heater core is verified, and heater outlet air temperature is low, a mechanical problem may exist.

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