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Would this circuit board work for model IS550/A? The circuit board number on my opener is 31180A - R1. I just want to be sure that the replacement part 36521R.S will work with my opener model.
Yes, this will work.
How many devices( keyless entry's or transmitters ) can you program to this reciever
You can program up to seven wireless devices.
Will this work on model #CM8600IC/A
Yes, it will.