My Car Is Overheating and My Heater Is Blowing Cold Air: What's Wrong if My Overflow Tank Is Full?

When a car's engine overheats and the heater blows cold air despite a full overflow tank, the problem may lie in several areas:

  • Coolant System Issue: The coolant system may be compromised due to a leak or a faulty water pump, leading to insufficient coolant circulation and overheating.
  • Thermostat Malfunction: A malfunctioning thermostat can prevent the coolant from flowing through the engine properly, resulting in overheating.
  • Air Bubble in Cooling System: An air bubble in the cooling system can create a blockage, hindering coolant flow and causing overheating.
  • Clogged Radiator or Heater Core: Deposits or debris may clog the radiator or heater core, restricting coolant passage and causing overheating and cold air from the heater.
  • Faulty Temperature Sensor: A faulty temperature sensor can send incorrect signals to the control unit, resulting in inaccurate temperature readings and improper cooling system operation.

Related Questions:

  1. Why is my car overheating if the coolant level is full? (Coolant system issue or air bubble in the system)
  2. What are the symptoms of a faulty thermostat? (Engine overheating and heater malfunction)
  3. How can I fix an air bubble in the cooling system? (Burp the system or replace coolant)
  4. How do I check if my radiator is clogged? (Inspect the radiator for debris or blockages)
  5. What does a faulty temperature sensor do? (Provides incorrect temperature signals, leading to improper cooling)

Related Hot-Selling Products:

  • Prestone Coolant
  • Wix Fuel Filter
  • Fram Oil Filter
  • Bosch Spark Plugs
  • NAPA Brake Pads

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