Forum Discussion

Gallifrey's avatar
Gallifrey
Explorer
Nov 20, 2016

Dash Temperature Control: Hot or Cold, no inbetween

Hi, Now that it's a bit chillier, I've noticed the temperature control knob on my dash is almost either full-on hot or full-on cold. There's a few degrees where I can adjust it between the two, but...
Class A
Harvard's avatar
Harvard
Explorer
Nov 20, 2016
The cockpit control sends an analog signal to the flapper valve control module. If this module (forward of the firewall) has ever been subjected to moisture (as in condensation etc) it will corrode and fail to operate the flapper valve correctly.

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