GX470 no defrost

[Ignignot]

The hot/cold air works correctly but nothing comes out of the windshield vents. Running the HVAC diagnostics i get 21, 23, 24, 33, 43.

I see there are 4 servos does anyone know which specific one controls the defrost?

 

[Comet]

I do not know which of the 4 does this. I only know if you replace 1, replace all 4 servos. I will be damned if I remove the entire dash ever again! Consider a replacement dash too if yours is cracked. I did not and regret it now.

 

[Ignignot]

Do any of the the aftermarket servos hold up ? Its almost $900 to get all 4 oem

 

[Comet]

I purchased OEM and did the “buy once, cry once” dance. Sorry, I do not know about the rock auto parts.

 

[Ignignot]

$1k to change all 4 servos and the fan OEM. Oof. Very tempted to go with SKP/four seasons for the actuators and get the Continental fan.