Hello,
It sounds like you could have a faulty blower motor resistor. That's why it is blowing only in one setting.
The blower motor resistor is located on the lower passenger side dash (see diagram below).
It is a very straightforward replacement process.
Here is a helpful article:
https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only
I have attached the diagrams for the blower motor as well as the resistor.
Please let me know of any questions.
Thank you.
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Thursday, July 29th, 2021 AT 10:53 AM