- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
take the test.
engine at or over 180F. (y./n)
full heat in other modes, (yes)
front defrost is weak.
weak front only,
1: recirculate is on, turn it off. (mixes cold with hot and net is warm)
2: damper failuire. (not going to defrost postion)
3: bad controls.
3a; some toys have a heater water valve, that i only opens 1/2 way
or is clogged. partially.
Airlock in the heater.. remove the uppermost hose and you will find little or no water comes out. Top up the hose and the part you took it off from using something like a large syringe and put it back spilling as little water as possible and hopefully you will get rid of the airlock.
i believe this is a vacuum operated system. if there is a problem with the vacuum supply to the control unit, it will automatically default to defrost. i would start by checking the vacuum source lines. good luck!
Check the a/c lines entering the firewall. Large hose should be cold and small line warm-hot.If o/k, may have vacumm leak to underdash control. If vacumm is lost the system will revert to heat and defrost. Could also be the air blend door is stuck. Maybe something dropped down defrost vent on dash. If this helps Please rate
Are the heater hoses warm or is just one of them warm? The reason i ask is because it looks like you've addressed everything but the heater core.It is possible that as a result of flushing the system that loose debris has clogged the passages to/of the heater core and would explain the loss of heat. hope this helps!
If you have Automatic Temperture Control then you will need a blower resistor module which could be around $100 to $200. If you have a manual temperture control then it can be just a simple $20 blower resistor.