Heater Cointrol On My Highlander

[Coon 0]

Any idea why my heater blows cold air when it's set around the ¾ mark? Above and below this setting it's ok. 2003 Toyota Highlander.

Thanks

[tipemup 0]

thermostat is prob bad, try burbing the system first and if that doesnt work its probably the stat

[Coon 0]

What do you mean burbing? And where is the stat on this thing? Thanks

[Jeremy airjer W 21]

It is not the thermostat! If the t-stat was bad there would be limited heat at any setting (if the stat was stuck open) which is not the case. Likely there is either a problem with the temp control switch or the hot and cold blend door actuator. I woulod suggest a call or trip to the dealer to see if it 1. a known issue and 2. if they are aware of a fix. Likely you will fall into the "need diagnostic time" catagory.

[Coon 0]

bummer..ok i'll let yas know...thanks