mitsumotors
NAXJA Forum User
- Location
- Winnipeg
My heater control(that select vent, defrost, floor, etc.) does not stay were i put it when driving at highway speeds. it usually defaults to the defroster and if i let off the gas for a second it goes to what i have selected but when i get back on the gas it usually goes back to defrost. it seems that the vacuum is not holding the vacuum diaphram open to hold the heating passage door open. its kinda random though. sometimes it is not a problem at all. i'm assuming that the little vacuum diaphram thingy is weak or leaking or something. what do you guys think?