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95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Heater - hot air only when moving

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Old Jun 6, 2013 | 05:47 AM
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WO
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Heater - hot air only when moving
I have a 2002 4Runner with 166000 miles. The heater only blows hot air when the vehicle is in motion. When it is idling, even at a red light, the air goes back to cold, then when I drive it blows hot air again. Any thoughts on what the issue is? Thanks!
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Old Jun 8, 2013 | 05:15 PM
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From: Erie PA
Thermostate
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Old Jun 9, 2013 | 04:08 AM
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Do you have enough coolant? The rear lines can leak out without you even knowing it.
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Old Jun 9, 2013 | 06:32 AM
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From: Columbia River Gorge, Oregon...east side
What's the water pump and timing belt status? The TB drives the WP.
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