Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) 4/4 heater not heating

Glad you got a result

Pictures below illustrate your findings. Although from Roadster's, it sounds like the mechanism is shared with other models.



The toothed wheel immediately behind heater control knob engages with holes in outer quadrant of pivoting lever shown below. The stepped end of inner part of bowden cable is clipped into hole on lever to transmit movement to heater control valve.



I guess the holes of inner quadrant are supposed to engage with spring ball detent. Not seemingly on mine though