2003 Honda Civic heater works intermittantly

2003 HONDA CIVIC
88,000 MILES • 4 CYL • FWD • AUTOMATIC
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DWERNER
  • MEMBER
  • 3 POSTS
would a thermastat make the heater not work at stop lights heater hoses one very hot the other not so hot
Oct 27, 2009 at 5:01 AM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
Hi dwerner,

Without the thermostat, the heater might not work correctly when the idling speed is low.

Check if the heater valve is opening correctly.
Oct 28, 2009 at 5:34 AM
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