Edmunds Answers

Answers

  • laltazan 08/10/11 7:31 am PST

    The mode door, that controls blower position is vacuum operated. When you accelerate, engine vacuum drops and spring pressure returns the mode door to the default, which is defrost. There is a vacuum accumulator that stores vacuum to prevent this. Chances are one of the lines between the vacuum source and the mode door actuator is leaking. The most common places are at the engine firewall and under the battery.

ADVERTISEMENT

Top Heating / Cooling Air Conditioner Experts View More

Rank Leader Points
1. karjunkie 1450
2. MrShift@Edmunds 1330
3. docj 375
4. tony78 375
5. texases 325
6. laltazan 320
7. 0patience 315
ADVERTISEMENT