toyota 4runner heater problem!!!

185,000 MILES • 6 CYL • 4WD • AUTOMATIC
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BUS36
  • MEMBER
  • 1 POST
i have a 2000 toyota 4 runner.. and the heater has gone out but the air conditioning still works. whats the problem
Nov 29, 2010 at 3:18 PM
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ERNEST CLARK
  • ✓Experienced Mechanic
  • 1,730 POSTS
First of all, do the controls work? If so, check heater control valve at the firewall. If that's good, check for a blockage in the heater core by attempting a flush. If that's good, you'll have to remove the HVAC unit and look for a stuck blend door or leaking vacuum line/solenoid.
Nov 29, 2010 at 3:49 PM
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