The heater does not work below 3000 rpms

1993 TOYOTA PREVIA
15,000 MILES
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KATHYHART
  • MEMBER
  • 1 POST
I have a Toyota Previa 1994. The fan works fine but below that benchmark it blows cold air. Whats wrong? The heater works fine on the highway. If I drive above 3000 rpms it works fine. Around town it obviously does not work well. Does OK in first and second gear if I keep the rpms up.
Jan 21, 2012 at 10:07 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check the coolant level first.if it's low it won't heat. then check to see if cables are opening doors and for a faulty water pump or heater control valve.
Jan 21, 2012 at 10:39 AM
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