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9.2 - Temperature Sensors ( )

See warning at beginning of section 9.1 page *.

The Delanaire system uses three, all are electrically identical. They measure:

- ambient air temperature (mounted on the RH blower housing),
- in car temperature (above the glove box, behind a small aperture in the dash)
- and on the evaporator.

These have three wires to them, power (5Volts from the ACC), ground, and the output wire. The output voltage is very closely controlled, and varies between 2.785V at 0C, rising by 0.01V per degree. So, a sensor at 20C (about 68F) should read 2.985V, and at 30C (about 90F) should read 3.085V, and so on. These can be measured reasonably easily with a standard 20k/Volt moving needle "hobby" type multimeter, at least well enough for fault finding purposes.


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