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Electronic Climate Control ECC S70 2000

No separate fuses, just one for the ECC and one for the blower. If you put the blower and vent in the 'auto' position before you start the engine, do you get any blinking lights?

The blinking lights would indicate an error found, which could be a blend door or a sensor failure.

It is possible that the left temp control knob is no longer working. The recirc switch not working might be the blend door actuator, but you would have to pull the glove box to see that.
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Keeping it running is better than buying new






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