Flying the C 172 with CM 1000, had everything set up and armed approach mode, it was below glidepath and within 20 degrees of ILS heading, and it sailed right on by like the LOC wasn’t even there. There was a LOC and GS beam, but it wouldn’t lock on it. Act’s like the approach mode is not working at all. Hand flew the ILS following the glide slope. and LOC
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