coolant levels are fine..I have replaced the themastat...that didn't help...bought a new radiator cap... that didn't help..the car has never had an over heating problem AND the carbon levels are fine on the smog test so there is no problem with the gasket...humm...can I check the heater valve lever from the inside on this car? Should i check that first before paying to have the heater core checked out? thanks!!
Honda Q&A
Ask Your Question2003 Honda Civic Question: heater is blowing cold air on idle or downhill...
-
Answer #1
dandd December 02, 2010, 19:18Reply
MasterYes, I would do a flow test of your heater core, it may be clogged. Can you hear the blend door move from cold to hot when you change the temp setting, because a non-functioning blend door can cause this as well. I don't see a heater control valve listed, so I would suspect that you have a blend door system.
Flag ThisLike0
Shops and Dealerships near you
Featured Shops and Dealerships
- (571) 252-8400 21715 Auto World Circle
Answer Ranks
This week's top 10
| 1 globalhelper | 6 csubak30 |
| 2 pushrod | 7 Hal... |
| 3 ziptie12 | 8 elk |
| 4 milesauto | 9 gearhead89 |
| 5 ella1234 | 10 Eric Sevim |