Caldina Heater temp issue

[matt dunn]

so sounds like its taking readings from thermistor sensor on dash, and thermistor sensor inside/under dash and trying to match the two by sending different temp air out the relative vents?

The one on the dash is a light sensor, not a temp sensor.

when it's up to temp it may put out warm air on your feet to keep the temp up,
and cool on your face to keep you awake.


What happens if you put it on full hot?

[MAGN1T]

Yoy're wasting your time doing all that shyte unless you've reset it first to confirm that it's still not working properly.
Reset as in disconnect the battery.

Really, and what is your source of this piece of misinformation???

There is no need to reset anything, resetting will accomplish nothing in this case as there is nothing to reset.

I suspect that this is the way it's supposed to be. However you can check for error codes by doing the following;

• With the ignition off simultaneously press AUTO & RECIRC/FRESH buttons.
• Turn ignition on.

Code(s) will be display on the temp display. If there is more than one code then press "FRONT" to cycle through them.

Post any codes you get here and I will check what they mean.

From the above......it's microprocessor controlled.

They get spiked and stop working properly.

So

If you don't reset it to clear the code and the corruption, you're completely wasting your time. It might not even be faulty, just corrupted.

Steve

[fivebob]

From the above......it's microprocessor controlled.

So you're just guessing (wrongly in this case). The first part of the test phase is a reset then it goes on to test all sensors and finally to test all the drives.

If you don't reset it to clear the code and the corruption, you're completely wasting your time.

The unit might be microprocessor controlled, however it does not store codes like a ECU does.

Also if you stop to think about this "fault" and the design of the airflow system, you would realise that it's going to be a mechanical issue not a microprocessor one.

Having looked into this further I believe this behaviour is probably by design and not a fault at all.