Q: Heater won't switch to other settings

asked by on June 26, 2016

The heater no longer let's me switch it off our feet or to any other settings or to the air-conditioning,can you give me some ideas of where to start ,it used to work fine but all of a sudden stopped letting me switch it to other settings,,and now that it's so hot outside I really need the

My car has 170000 miles.
My car has a manual transmission.

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