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2011 Jeep Cherokee - HVAC issues

my heat and ir will come on then stops comes back on a second and repeats shuts off then comes back on

As in the fan blowing the heat cycles on and off or the heat itself cycles on and off…I’m a little bit confused as your post isn’t clear…

the air and heat do work, just when i turn either on, it will work for 20 seconds then shut down 10 seconds and come back on and repeat

so the fans are cutting in and out? I would check the fuse for the blower, also check the resistor if you have a multimeter.

Thank you, mark

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