AO Platinum Member
Join Date: Feb 2002
Location: The land that Time forgot
This is normal.
The dial is connected to two small cables that open and close the heater control valve.
The heater control valve is just a circular hatch that rotates when you turn the dial (a bit like a keyhole cover).
Its total arc of movement is about 120 degrees between fully closed and fully open. When you turn the dial to "COLD" it rotates over the coolant inlet , so that hot coolant cannot travel into the heater matrix. When you turn the dial to "HOT" the hatch rotates opens and the hot coolant can get into the matrix.
The amount of rotation is fixed by the limits of the hatch. It only operates through about 120 degrees.. the dial has about 180 degrees.. so you won't ever get the dial operating through the full arc of movement (zero to max).
You can adjust the indicated range of where the dial operates by putting the dial on "Max" and then attaching the cable to the hatch when the hatch is fully open.. but it's just cosmetic. In this case the hatch will be fully closed when the dial is about 1/3 from "Cold".. You can't rotate the hatch through the range shown by the dial.
If you heater is cold, you could have a duff thermostat. The 'stat should run at where 76C would be on a CF1 engine (the one with "80" marked on the temperature gauge). It should run at where 86C would be on a CF2 engine (with "90" marked on the gauge).
Your dial's cable could also be broken of course.. so you heater valve is in the "closed" position and turning the dial doesn't open it. You need to take the lower dash out to fix it.. really a simple job.. but quite a lot of pieces to remove. There's an illustrated guide searchable on here ("heater matrix swap").
No bullets for Chaingun..
Last edited by Ralf S.; 30-01-13 at 06:40.