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Could be a faulty thermostat or maybe just low on coolant.

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13y ago
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Q: Why does the temperature gauge rise and fall in your car and at times you have no heat?
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Why does your temperature gauge rise and lower only when you have the heat on?

Why does your temperature gauge rise and lower only when you have the heat on?


Why is it when your temperature gauge does not move you do not get heat when your gauge moves you get heat in your Ford Taurus?

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