xjsc16x
Member
- Joined
- Aug 25, 2017
- Posts
- 82
- Reaction score
- 13
2002 Tahoe with dual zone manual controls (front on the dash and rear on the overhead). Truck was off the road for a few months, just now getting back into driving it and the heat is always blowing hot air.
Things I've done:
- confirm Air conditioning system is functional (compressor turns on, good pressure, lines going to and from the evaporator are ice cold)
- replaced blend door actuator with a new one off Rockauto
- took the actuator off and moved the rod myself and I can correctly change between cold and hot air
- relearn procedure at least 5 times now didn't do a thing
With the actuator off but still plugged in, I can see the the motor does move it a tiny bit but only maybe .5-1 degree. It's barely noticeable the amount it moves.
Is there any way I can chech the temperature contols or the signal coming to the actuator with a multimeter? What else can I do to diagnose this?
Thanks,
-Justin
Things I've done:
- confirm Air conditioning system is functional (compressor turns on, good pressure, lines going to and from the evaporator are ice cold)
- replaced blend door actuator with a new one off Rockauto
- took the actuator off and moved the rod myself and I can correctly change between cold and hot air
- relearn procedure at least 5 times now didn't do a thing
With the actuator off but still plugged in, I can see the the motor does move it a tiny bit but only maybe .5-1 degree. It's barely noticeable the amount it moves.
Is there any way I can chech the temperature contols or the signal coming to the actuator with a multimeter? What else can I do to diagnose this?
Thanks,
-Justin