Q: The front heater works only at high RPMs and the back only blows cold air
My vehicle has an issue with heating. Actually, there are two separate heaters that are controlled separately. One is in the front and the other at the back. The back one isn't toatally unresponsive, but it doesn't heat just blows cold air. Whereas, the front works when the RPM is about 2500. Please give me some suggestions. Thanks.
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